The silica content and viscosity of the magma increase as it rises through the continental crust, finally generating andesitic-rhyolitic magmas as a result of partial melting of the crust. That's accurate.
An andesitic magma is what?Stratovolcanoes frequently release thick lava flows made of andesite magma, some of which can be several kilometers long. Strong explosive eruptions from andesite magma can also result in pyroclastic flows, surges, and massive eruption columns. At temperatures between 900 and 1100 ° C, andesites erupt.
Magma becomes andesitic in what way?Wet partial melting of the mantle results in the formation of andesitic magma. Water is in contact with the mantle beneath the ocean. The mantle will heat up and water will be forced into it when subduction, or continental plates sliding apart, takes place.
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3. a. Identify a compound with a formula of C9H12 and an 1H NMR spectrum of 1.0 (t, 3H), 1.7 (sext, 2H), 2.6 (t, 2H), 7.2 (m, 5H). 4
b. Identify a compound with a formula of C9H12 and an 1H NMR spectrum of 0.95 (d, 6H), 1.7 (m, ninelines, 1H), 2.5 (s, 1H), 3.42 (d, 2H) . 4
The compound with a formula of C9H12 and an 1H NMR spectrum of 1.0 (t, 3H), 1.7 (sext, 2H), 2.6 (t, 2H), 7.2 (m, 5H) is likely to be a cyclic alkane, such as cyclononane.
b. The compound with a formula of C9H12 and an 1H NMR spectrum of 0.95 (d, 6H), 1.7 (m, ninelines, 1H), 2.5 (s, 1H), 3.42 (d, 2H) is likely to be an isomer of cyclohexene, such as cyclohexene itself or any of its derivatives like cyclohexene oxide.
What is a compound?A chemical compound is described as a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.
In conclusion, compounds consists of tow atoms or ion.
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The volume of the wood is
3.86
Correct unit
Which of the following compounds has the largest lattice energy?a. CsIb. CsFc. LiFd. LiIe. MgO
The correct option is E. MgO of the following compounds has the largest lattice energy.
Lattice energy can be defined as the electricity required to convert one mole of an ionic strong into gaseous ionic constituents. as a substitute, it is able to be described as the power that need to be furnished to one mole of an ionic crystal so that it will separate it into gaseous ions in a vacuum thru an endothermic procedure.
In chemistry, the lattice strength is the power change upon formation of 1 mole of a crystalline ionic compound from its constituent ions, which are assumed to to start with be inside the gaseous kingdom. it's miles a measure of the cohesive forces that bind ionic solids. "it is also referred as lattice enthalpy.
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find a 2nd degree interpolating polynomial p (x) for the points (-1,2), (1,3), (3,-1). then give the value for p (4).
The value for p (4) is -4.875 for a 2nd degree interpolating polynomial [tex]p(x)= \frac{-5x^2}{8} + \frac{(x)}{2} + \frac{(25)}{8}[/tex] for the points (-1,2), (1,3), (3,-1).
What are polynomial?
Algebraic expressions called polynomials include coefficients and variables. Indeterminates are another name for variables. For polynomial expressions, we can do mathematical operations like addition, subtraction, multiplication, and positive integer exponents but not division by variables. Polynomial is formed composed of the phrases Nominal, which means "terms," and Poly, which means "many." An expression that consists of variables, constants, and exponents that is combined using mathematical operations like addition, subtraction, multiplication, and division is referred to as a polynomial (No division operation by a variable). The expression is divided into three categories: monomial, binomial, and trinomial depending on how many terms are included in it.
Given points are (-1,2), (1,3), (3, -1).
Then 2nd degree polynomial p(x) [tex]=\frac{(x-1)(x-3)}{(-1-1)(-1-3)} *2 + \frac{(x+1)(x-3)}{(1+1)(1-3)}*3 +\frac{(x+1)(x-3)}{(3+1)(3-1)}*(-1)[/tex]
[tex]= \frac{(x^2-3x-x+3)}{(-2*-4)} *2 + \frac{(x^2-3x+x-3)}{(2*-2)}*3 +\frac{(x^2-x+x-1)}{(2*4)}*(-1)[/tex]
[tex]= \frac{(x^2-4x+3)}{4} - \frac{(x^2-2x-3)}{4}*3 -\frac{(x^2-1)}{8}[/tex]
[tex]= \frac{-5x^2}{8} + \frac{(x)}{2} + \frac{(25)}{8}[/tex]
Now,
[tex]p(x)= \frac{-5x^2}{8} + \frac{(x)}{2} + \frac{(25)}{8}[/tex]
[tex]p(4)= \frac{-5*4^2}{8} + \frac{(4)}{2} + \frac{(25)}{8}[/tex]
[tex]p(4)= \frac{-80}{8} + 2 + \frac{(25)}{8}[/tex]
[tex]p(4)= -10 + 2 + \frac{(25)}{8}[/tex]
[tex]p(4)= -8 + \frac{(25)}{8}[/tex]
[tex]p(4)= \frac{-64+25}{8}[/tex]
[tex]p(4)= \frac{-39}{8}[/tex]
[tex]p(4)= -4.875[/tex]
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which of the following pairs list a set of miscible liquids. x. octane (c8h18) and water y. acetic acid (ch3cooh) and water z. octane (c8h18) and cyclohexane (c6h12)
Pairs of miscible liquids include acetic acid (CH₃COOH), water, octane (C8H18), and carbon tetrachloride (CCl₄).
What kind of liquids mix easily?Miscible liquids are defined as substances that combine and form one layer when left undisturbed for a while. Consider how alcohol and water interact. Ethenyl acetate has a low dielectric constant. Water, on the other hand, has a comparatively high dielectric constant.
Miscible liquids are those that can easily combine to create a homogeneous solution. Examples are milk with water and alcohol. Liquids that are immiscible do not combine to form a single phase. Example: Honey, oil, and water—the oil floats on top of the water.
Are acetone and water miscible?Acetone is one of the most widely used organic solvents and has many applications in both research and business. The majority of these applications take advantage of the well-known fact that acetone and water can be combined in any ratio in ambient conditions.
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7. The states of matter are also included in many balanced equations. Describe the similarities and differences between the notations: (l) and (aq).
A liquid is any fluid that is practically incompressible, whereas an aqueous substance is a liquid that contains the solvent water.
What is states of matter?The different arrangements of certain particle groups under varied stresses and temperatures are referred to as states of matter. There are only three classical states of matter: solid, liquid, as well as gas. Historically, such descriptions have concentrated on a material's structure and volume.
While all liquids are, by definition, liquids, not all liquids seem to be aqueous solutions. The main distinction between a liquid and an aqueous substance is that a liquid is any fluid that is practically incompressible, whereas an aqueous substance is a liquid that contains the solvent water.
Therefore, a liquid is any fluid that is practically incompressible, whereas an aqueous substance is a liquid that contains the solvent water.
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the main reason that ch3oh has a higher boiling point than ch3sh is that ch3oh blank.target 1 of 3 the main reason that ch3ch3 has a higher boiling point than ch4 is that ch3ch3 blank.target 2 of 3 the main reason that cse2 has a higher boiling point than cs2 is that cse2 blan
Explanation:
Target 1 of 3: has hydrogen-bonding interactions.
Target 2 of 3: has dipole-dipole interactions.
Target 3 of 3: has stronger London dispersion forces.
identify the reactant acid and base in each of the following reactions by letters. 1. the acid is fill in the blank 1 the base is fill in the blank 2 2. the acid is fill in the blank 3 the base is fill in the blank 4
1. The acid is HCl (a) and the base is Na+ (b)
2. The acid is H3C-OH (a) and the base is NH2- (c)
In an acid-base reaction, an acid donates a hydrogen ion (H+) to a base, which accepts it. In the reaction, HCl (a) donates a hydrogen ion to Na+(b), which accepts it, forming NaCl (d) and HCN (e). This reaction is a classic example of a neutralization reaction, where an acid and a base react to form salt and water.
Acid-base reactions involve the transfer of a proton (H+) from an acid to a base. In the first reaction, H3C-OH (a) is the acid as it donates a proton to the base, which is Na+ (b). This results in the formation of H3C-O-(d), a salt, and Na+(e), which is now the conjugate base of the original acid.
In the second reaction, H3C-OH (a) still donates a proton to the new base, which is now NH2- (c), forming H3C-O-(d) and NH3 (f). NH3 (f) is the conjugate base of the original acid, H3C-OH (a).
It's important to note that an acid must have a hydrogen ion (H+) that can be donated, and a base must have an available lone pair of electrons to accept a proton in order for an acid-base reaction to occur.
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The complete question is:
Identify the reactant acid and base in each of the following reactions by letters.
1. HCl (a) + Na+(b) CN- (c) -> Na+(f) Cl-(d) + HCN(e)
The acid is ___.
The base is ___.
2. H3C-OH(a) + Na+(b) NH2-(c) -> H3C-O-(d) Na+(e) + NH3(f)
The acid is ___.
The base is ___.
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match the bond type with a description of how that bond may be predicted based upon information from the periodic table.
Ionic: One element has a much higher electronegativity than another (elements towards the right bonding with elements toward the left on the Periodic table)- Covalent: Two elements have nearly equal .
When the elements C and O are linked together, as in the crystal calcite, what type of minerals results?The molecular composition CaCO3 for the common primary minerals indicates that the molecule is made up with one calcium, 1 carbon, and three oxygens.In calcite, a molecular ion termed calcite, with a negative charge, is created when one carbon & three oxygen atoms are linked together by covalent bonds.
O and Si are they covalent or ionic?Synopsis. The SiO bond character is primarily ionic, but as the SiOSi angle is decreased from linearity to values close to the tetrahedral angle, covalent bond contribution become more prominent and the basicity rises.
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millipore sigma links to an external site.is a large reputable chemical manufacturers who allow free access to their sds. chemicals can be found by simply typing their name in the search field on the top right of the webpage. find the sds link in the resulting webpage next to a chemical description that best fits what you will be using in lab. to demonstrate the variability of sds, look up the sds (using the links above) of the three dyes used in this project: allura red ac, tartrazine, and brilliant blue fcf. review sds sections 2 and/or 3 to answer the questions below. note: two of the dyes don't have sds on both sites.
According to the MilliporeSigma chemical manufacturers statement, we aim to promote global human health and quality of life for our clients. Leading life science products and services are required to uphold this promise.
What do Tartrazine and Allura red represent?Introduction. Azo dyes are frequently used to enhance the visual appeal of food by enhancing its look. Among these, the yellow colorant tartrazine (E102) and the red dye allure (E129) are frequently employed in beverages, juices, baked goods, meat, and sweets products.
Allura Red AC: Is it dangerous?AS DEFINED BY OSHA 29 CFR 1910.1200 AS A HAZARDOUS SUBSTANCE. Possibility of having permanent effects. Although it is not believed that ingesting the substance will have any negative effects, it could nevertheless have a negative impact on the person's health after consumption, especially if they already have organ damage.
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Each of the following reactions shows a solute dissolved in water. Classify each solute as strong electrolyte, weak electrolyte, or nonelectrolyte.
1:uploaded image
2:uploaded image
3:uploaded image
4:uploaded image
5:uploaded image
Drag each item to the appropriate bin.
A, BC, DE, XY, Z
Strong Electrolytes Weak Electrolytes Nonelectrolytes
In chemistry, a solute is a substance that is dissolved in a solvent, usually water, to form a solution. Electrolytes are solutes that can conduct electricity in solution.
There are three types of electrolytes:
Strong Electrolytes: These are substances that completely ionize in solution, meaning they dissociate into separate ions. Examples of strong electrolytes include strong acids like hydrochloric acid (HCl), strong bases like sodium hydroxide (NaOH), and most salts like sodium chloride (NaCl).
Weak Electrolytes: These are substances that partially ionize in solution, meaning they only partially dissociate into ions. Examples of weak electrolytes include weak acids like acetic acid (CH3COOH) and weak bases like ammonia (NH3).
Nonelectrolytes: These are substances that do not ionize in solution and do not conduct electricity. Examples of nonelectrolytes include sugar (C12H22O11) and ethanol (C2H5OH).
It is important to note that the strength of electrolytes can be affected by factors such as the concentration of the solution, temperature, and the presence of other solutes.
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germicidal chemicals . multiple select question. are generally more reliable than heat have mechanisms of action that are well characterized usually react irreversibly with proteins, dna, cytoplasmic membranes, or viral envelopes are often poorly understood with regards to mechanisms of action
Germicidal chemicals generally:
Have mechanisms of action that are well characterized
React irreversibly with proteins, DNA, cytoplasmic membranes, or viral envelopes.
Germicidal chemicals are substances used to kill or eliminate microorganisms, including bacteria, viruses, fungi, and parasites. They are often used in healthcare settings, industrial processes, and households to disinfect surfaces and control the spread of infectious diseases. Germicidal chemicals work by breaking down or disrupting the structural components of microorganisms, such as proteins, DNA, cytoplasmic membranes, and viral envelopes. The mechanism of action of these chemicals is generally well understood, and they are designed to react irreversibly with these components, effectively killing the microorganisms. However, it is important to note that not all germicidal chemicals are created equal and some may have limited efficacy against certain microorganisms. Additionally, the choice of germicidal chemical will depend on the specific use-case and the desired outcome.
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fill in the blank.in the case of toxic substances the standard measurement of toxicity is known as a ld50 the lethal dose causing the death of ___% of the organisms exposed to the substance
Lethal Dose, or LD, is its initials. The lethal dose (LD50) of a substance is the dose of that substance that, when administered all at once, will kill 50% (or half) of a set of test animals.
In toxicology, why is LD50 significant?The median lethal dose (or LD50) is the amount of a test chemical that will kill 50% of the animals in a dose group. Industrial chemical acute hazard comparisons have been done using LD50 values.
What governs LC50 in its fundamentals?A substance's LC50 value is the concentration at which it will kill 50% of the tested organisms. Any exposure duration can have its LC50 established, although 96 hours is the most typical.
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The Calculation to find the milligrams of ferrous ion, Fe^2+, in 325 mg (0.325 g) of anhydrous ferrous sulfate, FeSO_4, is 0.325 g FeSO_4 x 55.85 g Fe^2+/151.85 g FeSO_4
= 0.120 g Fe^2+
or 120. mg Fe^2+ 325 mg of which hydrate of iron (II) sulfate below contains 65 mg Fe^2+? This conforms to the label on the tablet box: 65 mg of Fe^2+ for every 325 mg "iron (II) sulfate"
A. FeSO_4*4H2O
B. FeSO_4*5H2O
C. FeSO_4*7H2O
D. FeSO_4*9H2O
The correct answer is C. [tex]FeSO_4*7H_2O[/tex], as it contains 65 mg of [tex]Fe^{2+}[/tex] for every 325 mg "iron (II) sulfate", which conforms to the label on the tablet box.
The number of water molecules in the hydrate affects the molar mass of the compound, and therefore, the number of moles of ferrous ion [tex]Fe^{2+}[/tex] in a given mass of the hydrate. So, by finding the molar mass of each hydrate, and then comparing the number of moles of [tex]Fe^{2+}[/tex] in each one, we can determine which hydrate contains 65 mg [tex]Fe^{2+}[/tex]. The anhydrous form of ferrous sulfate, [tex]FeSO_4[/tex] , contains only one molecule of [tex]Fe^{2+}[/tex] per formula unit. However, when it forms hydrates, it can contain multiple water molecules in addition to the [tex]FeSO_4[/tex] molecule. The number of water molecules in the hydrate affects the molar mass of the compound and therefore the number of moles of [tex]Fe^{2+}[/tex] in a given mass of the hydrate.
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question content area draw the structures of the products of the neutralization reaction between pyridine and propanoic acid.
The neutralization reaction between pyridine and propanoic acid produces two products, 2-pyridin-3-ylpropanoic acid and ammonium propanoate. The structure of 2-pyridin-3-ylpropanoic acid is shown below:
H
|
C-C-C-C-O-C-N-H
|
H
The structure of ammonium propanoate is shown below:
H
|
C-C-C-C-O-N-H+
|
H
A Lewis structure, named after Gilbert N. Lewis, is an arrangement of atoms in a molecule or ion that shows the number of electrons that are shared between atoms and is used to explain the bonding and molecular structure of a compound.
In a Lewis structure, the electrons are represented by dots or lines and the atoms are represented by the chemical symbols of each element.
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suppose you are asked to find the area of a rectangle that is 2.1- cmcm wide by 5.6- cmcm long. your calculator answer would be 11.76 cm2cm2 . now suppose you are asked to enter the answer to two significant figures. (note that if you do not round your answer to two significant figures, your answer will fall outside of the grading tolerance and be graded as incorrect.) enter your answer to two significant figures and include the appropriate units. activate to select the appropriates template from the following choices. operate up and down arrow for selection and press enter to choose the input value typeactivate to select the appropriates symbol from the following choices. operate up and down arrow for selection and press enter to choose the input value type nothingnothing
11.76 cm² to two significant figures will give the area of the rectangle as 11.8 cm².
How to reduce numbers to two significant figures?To reduce a number to two significant figures, you need to perform the following steps:
Determine the first significant figure by finding the first non-zero digit from the left.Count the total number of digits after the first significant figure.If there are more than two digits after the first significant figure, round the number to the second significant figure.If there are less than two digits after the first significant figure, leave the number as is.To reduce 11.76 to two significant figures, you need to determine the first two non-zero digits and the location of the decimal point. The first two non-zero digits are 11, and the decimal point is between the 1 and the 7. Therefore, the reduced number is 11.8 (since the rounding rule is to round up if the third digit is 5 or greater). So, 11.76 reduced to two significant figures is 11.8 cm².
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Electrons accelerated by a potential of 70 V are incident perpendicularly on the surface of a single crystal metal. The crystal planes are parallel to the metal surface and have a (cubic) lattice spacing of 0.352 nm. Sketch how the intensity of the scattered electron beam would vary with angle.
The angle, sine theta, divided by lambra from this formula yields a parabola, which is our final answer.
The wavelength of an electron can be calculated by dividing h by under root 2 m e v. The plank is now constant. It is equal to 6.68 multiplied by 10, raised to minus 34, and divided by under root 2. The m will be the electron mass, which is 9.1 multiplied by 10, raised to minus 31. The electron charge is 1.6 multiplied by 10, raised to minus 19, and v is the potential difference, which is equal to 70 volts in the equation.
∧= [tex]\frac{h}{\sqrt{2meV} }[/tex] (where, h is plancks constant, m is the mass of electron, e is the charge on electron and V is the potential difference).
By putting the values in the formula we will get:-
∧= [tex]\frac{6.68*10^{-34} }{\sqrt{2*9.1*10^{-31} }*1.6*10^{-19}*70 } = 0.1468[/tex]
We will get the driburg wavelength of electron by solving these. Lambda equals 0.1468 multiplied by ten. Raised to minus 9 metre, we get 0.1468 nanometer when converting to nanometer. Now, according to the breslow, the well-known breslow formula, 2 d sine theta, equals m lambda.
d's value is equal to a, which is already given. The refraction order is equal to 1 for 0.35 t nanometers. We can calculate the value of theta, which is the refraction angle, by taking the sine inverse of m lambda, dividing it by two, and multiplying it by d. Now, if we solve sine inverse again, the value of m will be 9.1 multiplied by 10, raised to Minus 31 point: the value of lambda, which we already found, is 0.1468 nanometer divided by 2, and the value of d is 0.352 nanometer. We will get the refraction angle by solving this here. Theta equals 11.9860 degrees. I now gives the intensity of the scatter beam.
2dsintheta= m∧
Theta=[tex]\frac{9.1*10^{-31} *0.1468*0.352}{2} = 11.9860[/tex]
The intensity of the scatter beam can now be calculated as I not e square divided by m square c multiplied by sine square theta divided by r square. So we must draw the intensity verses, the intensity of the scateriversis, (See Picture). The angle, sine theta, divided by lambra from this formula yields a parabola, which is our final answer.
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true/false. ifferentiate between chemical and electrical synapses differentiate between different glial cell types and explain their function within the nervous system differentiate neurons bases on different physical, chemical, and connectiv
True.
Electrical synapses involve the release of neurotransmitters from one neuron that bind to receptors on another neuron, causing a change in the electrical potential of the post-synaptic neuron and transmitting information. Electrical synapses involve the direct flow of ions between neurons, allowing for rapid and synchronized firing of action potentials.
About ElectricElectric is a series of physical phenomena related to the presence and flow of electric charge. Electricity causes a variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. Electrical energy or electric power is one of the main types of energy needed for electrical equipment or energy stored in an electric current with units of amperes and voltage.
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which of these substances will not form a covalent network solid? select the correct answer below: carbon dioxide silicon silicon dioxide carbon graphite
The correct answer is that Carbon Dioxide will not form the covalent network solid.
At normal pressure and temperature, carbon dioxide is a colorless, non-flammable gas. Carbon dioxide has a significant role in the composition of our planet's air, while being far less prevalent than nitrogen and oxygen in the atmosphere. One carbon atom and two oxygen atoms make up the molecules of carbon dioxide (CO2).Polar covalent bonds are the kind of bonds that exist between the atoms of a carbon dioxide molecule. A carbon atom is bonded to two oxygen atoms in a carbon dioxide molecule by four covalent connections, with each oxygen atom having two covalent links. No attraction between solvent molecules and carbon atoms is likely to be stronger than the attraction between covalently bonded carbon atoms.
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use the spectroscopy interactive to determine which element has an emission spectrum that contains mostly longer wavelengths: helium hydrogen sodium neon
The correct option is A. Helium uses the spectroscopy interactive to determine which element has an emission spectrum that contains mostly longer wavelengths.
Spectroscopy method the dispersion of mild into issue colors. In easy words, it's miles a technique to measure how much mild is absorbed by a chemical substance and at what depth of mild passes thru it. As in step with analytical science, every detail or compound has a completely unique function spectrum.
Spectroscopy is the sector of examination that measures and translates the electromagnetic spectra that end result from the interplay between electromagnetic radiation and matter as a feature of the wavelength or frequency of the radiation. examine the absorption and emission of mild and other radiation by way of the count, as related to the dependence of those approaches on the wavelength of the radiation.
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at elevated temperatures, sodium chlroate deocmpsoes to produce sodium chloride and oxygen gas a 0.8765 g sample of impure sodiujm chlorate was heated until the production of oxygen gas ceased he oxygen gas collecte dover water occupied
When sodium chlorate is heated at elevated temperatures, it decomposes to form sodium chloride and oxygen gas.
In the experiment, a 0.8765 g sample of impure sodium chlorate was heated until the production of oxygen gas ceased. The oxygen gas collected over water occupied a volume of 45.74 mL at a temperature of 20°C and a pressure of 745 mmHg.
The number of moles of oxygen gas collected can be calculated using the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. Thus, the number of moles of oxygen gas produced is 0.0059 moles.
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Two students each measured the density of a quartz sample three times: Student A Student B 1. 3.20 g/mL 2.82 g/mL The density found in the Handbook 2. 2.58 g/mL 2.48 g/mL of Chemistry and Physics for quartz 3. 2.10 g/mL 2.59 g/mL is 2.65 g/mL mean 2.63 g/mL 2.63 g/mL. Are the errors for these students random or systematic? Explain.
The errors in the observations of students are random errors as there is no co linearity in the observations.
What are errors?Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.
There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.
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Which of the following pairs of atoms and ionsare isoelectronic? Check all that apply.
Answer: Na , Ar
Po2- , Rn
Explanation:
Isoelectronic species are atoms or ions that have the same number of electrons. This means they have similar electron configurations and therefore exhibit similar chemical behavior. In the given options, the pairs of atoms and ions that are isoelectronic share the same electron configuration. From the given options, Na⁺ and Ne, N³⁻ and F⁻, and P³⁻and S²⁻ are isoelectric.
The pairs of atoms and ions that are isoelectronic are:
Na⁺ and Ne: Both have the electron configuration of 1s² 2s² 2p⁶, so they have the same number of electrons.
N³⁻ and F⁻: Both have the electron configuration of 1s² 2s² 2p⁶, so they have the same number of electrons.
P³⁻and S²⁻: Both have the electron configuration of 1s² 2s² 2p^6 3s² 3p⁶, so they have the same number of electrons.
Therefore, the correct pairs of isoelectronic atoms and ions are Na⁺ and Ne, N³⁻ and F⁻, and P³⁻and S²⁻.
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please select all plausible lewis dot structures which are theoretically possible. note: this question has multiple correct answers.
A Lewis dot structure is a representation of the valence electrons of an atom or molecule.
The dots represent the electrons in the outermost shell, and it is possible to draw multiple Lewis dot structures for a molecule if there are different arrangements of valence electrons that are theoretically possible.
For example, for the molecule BF3, the following Lewis dot structures are possible:
(i)
F : B : F
: ::
. . . .
(ii)
F : B :: F
: :
. . . .
(iii)
F : B : : F
: .
. . . .
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which of the following corresponds to the pair of atoms that are isotopes? group of answer choices 3215x and 3417x 3215x and 3216x 3215x and 3115x 3215x and 3117x
32/15 X and 31/15 X are the following corresponds to the pair of atoms that are isotopes.
What atom pairs make up isotopes?Isotopes, also known as isotopic nuclides, are two atoms with the same atomic number but different masses (the same number of protons but different numbers of neutrons). Isotopes behave differently physically and chemically because the mass of these atoms is altered by their varied neutron counts.
Which pair of isotopes is this?A pair of atoms must belong to the same element in order for them to be isotopes. They must both contain the same number of protons in order to constitute the same element. They have the same atomic number if they have the same number of protons. Z stands for the atomic number.
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which of the following is the balanced net ionic equation for an oxidation-reduction reaction between ag (aq) and ni(s) based on the half-reactions represented above?
Ni2+ = 2Ag(s)+(aq)+Ni(s) (aq) Based on the half-reactions, the balanced net ionic equation for an oxidation-reduction reaction between ag (aq) and ni(s) is 2Ag+(aq)+Ni(s) 2Ag(s)+Ni2+(aq).
What is produced by the reaction between solid copper and aqueous silver nitrate?The balanced equation below represents the reaction between solid copper and aqueous silver nitrate, which results in solid silver and blue solution: 2AgNO Cu(s) (aq) Cu(NO )(aq) (aq) 2Ag(s) based on the equation's balance.
What happens when potassium and strontium chloride are combined in water?A precipitate of strontium sulfate is created when aqueous strontium chloride (SrCl2) and aqueous potassium sulfate (K2SO4) react (SrSO4).
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when an object is burned what happens to its matter
Answer: The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.
Explanation:
For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Step 1: Hz(9) + ICI(9) HI(g) + HCl(9) (slow) Step 2: HI(9) + ICI(9) + HCl(9) +1,(9) Which of the following represents the overall chemical equation for the reaction and the rate law for elementary step 2?A. The overall reaction is H2(g) + 2 ICI(g) HCl(9) +12(9); the rate law for step 2 is rate = k[H] [HT ICI). B. The overall reaction is H2(g) + 2 ICI(g) + 2 HCI(g) +12(9)the rate law for step 2 is rate = k[H] [ICI). C. The overall reaction is H2(g) + ICI(9) ► HCI(g) +13(); the rate law for step 2 is rate = k[H2) (ICI). D. The overall reaction is H2(g) +2 ICI(9) + 2 HCl(9)+1(); the rate law for step 2 is rate = k[HT (ICI).
The proper answer is D. H2(g) + 2 ICI(g) + 2 HCI(g) + 1() is the equation for the total reaction, while the rate law of step 2 is rate = k[H2] [ICI].
Chemical equation: what is it?Chemical equations are kind of symbolic illustrations of chemical reactions where the reactants and products are stated in term of their corresponding chemical formulas.
What rules regulate chemical equations?Chemical equations should be balanced, meaning that each element must have an equal amount of atoms on the both sides of an equation. As a consequence, the mass of both reactants and the mass of a reaction's products must match.
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an alloy is a mixture of metals. suppose that a certain alloy is made by mixing 300 grams of an alloy that contains 72% copper with 20 grams of pure copper. answer the questions below. do not do any rounding.
The resulting alloy mixture the copper is 73.75% or 236 grams copper in the resulting alloy mixture.
= 300 x 72%
= 300 x 70/100
= 216
Resulting mixture = 300 + 20 = 320
= 216 + 20 / 320 x 100
= 236/320 x 100
= 295/4
= 73.75%
i. 236 gram copper in the resulting mixture.
ii. 73.75% copper in resulting mixture.
An alloy is a mixture of two or more elements, where at least one of the elements is a metal. These alloys have different properties compared to their pure metal counterparts and are used in a variety of applications. For example, steel is an alloy made up of iron and carbon, which is stronger and more durable than pure iron. Other common alloys include brass (copper and zinc), bronze (copper and tin), and aluminum (aluminum and other elements).
The specific combination of elements and the ratios in which they are mixed determine the properties of the alloy. These properties can include strength, durability, resistance to corrosion, and electrical conductivity. Alloys are widely used in the manufacturing of various products, from automobiles and buildings to medical devices and electronics. With the ability to tailor the properties of alloys, they play a crucial role in many technological advancements and industries.
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which of the following bonds has the ability to rotate? n (amide) to c (alpha) c (alpha) to c (carbonyl) c (carbonyl) to n (amide)
N (amide) to C (alpha), (b) C (alpha) to C (carbonyl).
Do amide bonds spin around?The chemically unequal nitrogen protons exchange as the amide bond spins. The ensuing dynamic NMR spectra offer a potent and well-proven method for deriving the kinetic parameters using variable-temperature NMR experiments because they are quite sensitive to the pace of this exchange.
Which bond types are present in amide?Peptide bonds include amide bonds. It is created when the carboxyl group of one amino acid bonds with the amine group of another amino acid, losing one water molecule in the process.
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