Answer:
The correct answer is 119.
Explanation:
We are given the bond length of XY is 212.
The covalent radius of Y = 93.
Now this means that the bond length(R) is sum of the radio of X and Y Atom.
So, R(XY)=r(X)+r(Y)
212 = r(X)+93
r(X)= 119.
Therefore, the covalent radius of X is 119.
I hope this helps, have a good day! :D
Bond length is the distance between two bonded atoms. The covalent radius of X in XY molecule with bond length 212 and Y with a covalent radius of 93, is 119.
What is covalent radius?Covalent radius is the measure of the atomic size bonded with another atom through covalent bond. Covalent bonds are formed between non-metals with comparable electronegativities.
Bond length of molecule is the distance between the two bonded atom. Mathematically bond length of a covalent compound is the sum of covalent radius of the two bonded atoms.
The bond length of the molecule XY is given as 212 and the covalent radius of Y atom is 93. The bond length 212 is the sum of covalent radius of Y and covalent radius of X.
Covalent radius of X = 212 - 93 = 119.
Therefore, covalent radius of X atom in the XY molecule with bond length 212 and Y atom with covalent radius of 93 is 119 thus, option a is correct.
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A certain chemical reaction releases 27.4 kJ/g of heat for each gram of reactant consumed. How can you calculate what mass of reactant will produce 880. J of
heat?
Set the math up. But don't do any of it. Just leave your answer as amath expression.
A chemical reaction of exothermic kind releases energy in the form of heat and light.
We are given that reactant releases 27.4kJ/g for every gram of reactant consumed.
We are required to find number of grams of reactant that has been consumed
It is also given that 880J of energy is released
Hence, grams of reactants consumed is 880/27.4gm
Disclaimer:
It has been asked by the student to leave the question as mathematical expression.
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18. What is the mass of an object with a density of 2.44g/ml and a volume of
25ml?
a. 61g
b. 61.0g
c. 10.2g
d. 0.098g
The mass of the object with a density of 2.44g/ml and a volume of
25ml is 61g
Density is mass per unit volume.The mass is as follows;d=m/vm=dvm= 2.44 g/ml ×25 ml=61gThe measure of how densely a substance is packed together is called density. It is defined as the mass per unit volume.A measurement of density contrasts the mass of an object with its volume. The amount of matter in a certain volume of an object is referred to as high density. A substance's density describes how thick it is in a given space. Density is essentially a measurement of how tightly things are packed. It is a particular physical trait of that thing.To learn more about density visit:
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Calculate the mass of potassium hydroxide, KOH, required to prepare 174.59 cm3 of a 0.864 mol dm-3 solution.
Taking into account the definition of molar concentration and molar mass, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by:
Molarity= number of moles÷ volume
Definition of molar massThe molar mass of substance is defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Mass of potassium hydroxideIn this case, you know that:
Molarity= 0.864 mol/dm³Volume= 174.59 cm³= 0.17459 dm³ (being 1 cm³= 0.001 dm³)Replacing in the definition of molar concentration:
0.864 mol/dm³= number of moles÷ 0.17459 dm³
Solving:
0.864 mol/dm³ ×0.17459 dm³= number of moles
0.1508 mol= number of moles
The molar mass of KOH is 56.1 g/mol. So, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 56.1 grams, 0.1508 moles of the compound contains how much mass?
mass= (0.1508 moles×56.1 grams)÷ 1 moles
mass= 8.45988 grams
In summary, the mass of potassium hydroxide, KOH, required to prepare 174.59 cm³ of a 0.864 mol/dm³ solution is 8.45988 grams.
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Which of the following describes a difference between thunderstorms and hurricanes?
A Hurricanes last for a shorter period of time than thunderstorms.
B
Thunderstorms have much stronger winds than hurricanes.
с Thunderstorms don't have a spiral wind formation and hurricanes do.
D
Hurricanes form over warm land while thunderstorms form over water.
Answer:
The answer to your question is C. Thunderstorms don't have a spiral wind formation and hurricanes do. Hope this helps.
Explanation:
Is there anything wrong in this definition, if so, write the correct form: Intensive properties do not depend on the amount of matter present. Such properties include the melting point, boiling point, density, and ability to conduct electricity and to transfer energy as heat. Intensive properties are the same for a given substance regardless of how much of the substance is present.
Help will give brainly!!
Answer:
The definition and all examples are correctly mentioned only one mistake is spotted which is transfer of energy as heat included in Intensive Property which is wrong.
Explanation:
Intensive Property: Intensive properties are those properties which are Independent of the amount substance present.
For e.g. The melting point of ice on standard temperature & pressure is constant i.e. 0°C.
1 gram of ice will melt at 0°C so will be 1 kilogram ice. Hence melting point & similarly boiling point also is an Intensive Property.
before talking about Density let's understand Extensive properties.
Extensive Property: Extensive properties are those properties which are Dependent of the amount substance present.
for e.g. Volume, Weight, Mass, Length, Energy, Enthalpy, Entropy etc.
When One extensive divided by another extensive Property then perticular that property of substance is also intensive property.
Now we know that,
[tex] \sf Density = \frac{Mass}{volume} [/tex]
Where mass & volume both are extensive properties, hence density is an intensive property.
Ability to conduct electricity is called as Thermal Conductivity which is an intensive property.
The thermal conductivity of a perticular material does not change it varies material to material.
Transfer of energy as heat, let's have quick look at heat & temperature relation given by,
[tex]C = \frac{Q}{\Delta T} [/tex]
Where C is specific heat capacity which is an intensive property & specific heat is the ratio of added heat to the change in temperature & Heat is an Extensive property.
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A rectangular piece of copper, 2.13 cm by 0.79 cm by 1.14 cm, weighs 17.11g. What is the density of the copper?
The Density of the copper is 8.91 g/cm³.
What is the density of the copper?The density of a substance is obtained from the ratio of the mass and the volume of the substance.
The formula of density is given below:
Density = mass/volumeThe mass of the copper is 17.11 g
The volume of the rectangular piece of copper is calculated as:
volume = length * breath * height
Volume of the rectangular piece of copper = (2.13 * 0.79 * 1.14) cm³
Volume of the rectangular piece of copper = 1.92 cm³
Density of the copper = 17.11 g/1.92 cm³
Density of the copper = 8.91 g/cm³
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Determine the number of protons and electrons in
each lon
Al3+
Enter your answers as integers separated by a comma.
#p¹, #e=
Number of protons in Al^3+ are 13 and number of electrons are 10.
Every atom has a proton, a subatomic particle, in its nucleus. The particle is electrically charged positively.A negatively charged subatomic particle known as an electron can either be free or attached to an atom.The number of protons in the nucleus is equal to the atomic number.The number of electrons in a neutral atom is equal to the number of protons.Here aluminium is not an atom. it is presented as ion.
Atomic number of aluminium is 13
therefore, number of proton = 13
This aluminium ion Al^3+ has a positive charge of three. Aluminum, which has an atomic number of 13, has lost three electrons when it has a positive charge of 3.
therefore number of electrons in aluminium ion = 13 - 3 = 10
+3 charge will not affect the number of proton. thus number of proton will remain same as atomic number of aluminium.
Therefore, number of proton in aluminium ion are 13 and number of electrons in aluminium ion are 10.
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Name the material sent into space by a supernova
Answer:
Nebula Was Sent Into Space By Supernova
This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.
Answer: This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.
Explanation:
how many grams is there if you have 2.85x10^-4 with 176g/mol
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
The mass of a certain molecule is its molecular mass, which is expressed in daltons. Because they contain various isotopes of an element, multiple molecules of the same substance can have distinct molecular weights.
mole = 2.85x10^-4
mol. weight = 176g/mol
Formula,
mole = weight taken / mol. wt of the compound
2.85x10^-4 = weight taken / 176g/mol
weight taken = 2.85x10^-4 x 176g/mol
=0.05016 grams
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
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What is the limiting reactant if 0.5 g Al is reacted with 0.5 g CuCl2?
What is the theoretical yield of copper produced by this reaction?
1. The limiting reactant is CuCl₂
2. The theoretical yield of copper is 0.24 g
Balanced equation2Al + 3CuCl₂ —> 2AlCl₃ + 3Cu
The following were obtained from the balanced equation:
Molar mass of Al = 27 g/mol Mass of Al from the balanced equation = 2 × 27 = 54 gMolar mass of CuCl₂ = 63.55 + (2 × 35.5) = 134.55 g/mol Mass of CuCl₂ from the balanced equation = 3 × 134.55 = 403.65 gMolar mass of Cu = 63.55 g/mol Mass of Cu from the balanced equation = 3 × 63.55 = 190.65 gFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂ to produce 190.65 g of Cu
1. How to determine the limiting reactantFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂
Therefore,
0.5 g of Al will react with = (0.5 × 403.65) / 54 = 3.74 g of CuCl₂
From the above calculation, we can see that a higher amount (i.e 3.74 g) of CuCl₂ than what was given (i.e 0.5 g) is needed to react completely with 0.5 g of Al.
Thus, CuCl₂ is the limiting reactant.
2. How to determine the theoretical yield of copperFrom the balanced equation above,
403.65 g of CuCl₂ reacted to produce 190.65 g of Cu
Therefore,
0.5 g of CuCl₂ will react to produce = (0.5 × 190.65) / 403.65 = 0.24 g of Cu
Thus, the theoretical yield of Cu is 0.24 g
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C4H8(g)⟶2C2H4(g)
has an activation energy of 262 kJ/mol.
At 600.0 K, the rate constant, , is 6.1×10−8 s−1. What is the value of the rate constant at 820.0 K?
The value of the rate constant at 820.0 K is 0.2 s^-1
Applying the Arrhenius equation, which is...
k = Ae-Ea/RT
Applying the formula, we get
lnk2 = lnk1 - (Ea/R)(1/T2 - 1/T1)
Applying the values, we get
ln k2 = ln 6.1x10^-8 - (2.62x10^3/8.314)(1/820 - 1/600)
Calculating the value, we get...
ln k2 = -0.31
Taking power e, we get
k2 = 0.2 s^-1
Arrhenius equation relates the temperature and activation energy of a reaction.It is helpful in studying the different parameters related to reaction.Activation energy is the minimum required to attain to form the product.To learn more about the activation energy visit:
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235 miles converted to kilometers
Answer:
378.196
Explanation:
Multiply the length value by 1.609.
235 miles = 378.196 kilometers
Answer:
378.196 Kilometers
Explanation:
For an approximate result, multiply the length value by 1.609.
235*1.609 = about 378.2
A 4.000-mL urine sample from a person suffering from diabetes mellitus has a mass of 4.007 g.
Express your answer using four significant figures.
The concentration of the urine is determined as 1.002 g/ml.
What is concentration?The concentration of a chemical substance expresses the amount of a substance present in a mixture.
What is the urine concentration?The concentration of the urine is determined from the ratio of mass to volume of the urine or density of the urine.
Urine Concentration = mass / volume
Urine concentration = 4 .007 g / 4 ml
Urine concentration = 1.002 g/ml
Thus, the concentration of the urine is determined as 1.002 g/ml.
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The complete question is below:
determine the concentration of the urine.
Can you please help me
The difference between oxygen and ozone
Differences between oxygen and ozone
oxygen exists as a diatomic molecule whereas ozone exists as triatomic molecules.oxygen mass is 32 amu on the other hand ozone has 48 amuOxygen has no odor but ozone has a very sharp odor. when oxygen atoms react with oxygen molecules then ozone forms. The average length of an O=O double bond is 121 pm on the other hand ozone exists in resonance ozone is a polar molecule and have stronger intermolecular forces. The contribution of the electron pair from the central oxygen atom leaves a small positive charge on the central O atom. hence ozone molecules become dipole whereas diatomic oxygen is non-polar.To know more about oxygen visit :
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What is the difference between
a. Acid and Base
b. Weak acid and strong acid
c. Organic acid and minerals acid
d. Neutral salt and minerals acid
Base is a proton acceptor, whereas acid is a proton giver.
Strong acid and strong base depend upon ionization.
Acid is a hydrogen ion donor and base is a hydrogen ion acceptor.When an acid is dissolved in water, all of its molecules disintegrate, making the acid powerful. When an acid is dissolved in water, only a small number of its molecules disintegrate, making the acid weak.A strong acid is an acid in which all of the acid is dissolved in water, its molecules disintegrate.A weak acid is an acid in which only a few molecules break apart when the acid is dissolved in water.Mineral acids are inorganic compounds consisting of different chemical element combinations, whereas organic acids are organic molecules mostly composed of carbon and hydrogen atoms. This is the main difference between mineral acids and organic acids.Mineral acids are inorganic compounds consisting of different chemical element combinations, The acid for which pH is close to 7 is a neutral acid.To learn more about acids visit:
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Review the terms and their definitions in the Mini Glossary. Write a sentence explaining how your body gets energy from food
Food energy is transformed into energy that the body's cells can utilise during cellular respiration. Energy is converted to ATP during cellular respiration, which transforms glucose and oxygen into carbon dioxide and water.
What kind of energy is used by your body to develop and maintain itself?
Your body can move its muscles when you ingest food, which enables you to breathe, walk, run, leap, lift objects, and perform all the other survival-related tasks. The mechanical energy of moving muscles is created from the chemical energy of food.
What kind of energy is used by your body to develop and maintain itself?Your body can move its muscles when you ingest food, which enables you to breathe, walk, run, leap, lift objects, and perform all the other survival-related tasks. The mechanical energy of moving muscles is created from the chemical energy of food.
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A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 90.2 pg. What is the total mass
in micrograms of cofactor A in a yeast colony containing 10^5cells?
The total mass in micrograms of cofactor A in a yeast colony containing 10^5cells is 2.47 ug.
As a cofactor for several oxidative and biosynthetic activities in intermediate metabolism, coenzyme A (CoASH) has a distinct function. When acyl-CoA thioesters are produced from organic carboxylic acids, the acid is activated for additional biotransformation processes and enzyme recognition is facilitated.
A coenzyme is an organic, non-protein molecule that an enzyme needs in order to carry out its catalytic function. An enzyme is a protein that serves as a catalyst to speed up biological reactions without changing itself in the process.
24.7 pg./cell x 105 cells x 1 ug/106 pg.
= 24.7x10-1 ug
= 2.47 ug
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The distance between Miami and Key Largo is 70. miles. If a mile is 5,280ft and 1 inch is 2.54 cm, calculate this distance in kilometers.
If the distance between Miami and Key Largo is 70 miles, this distance is equivalent to 112.65 kilometers.
What is distance?Distance is the amount of space between two points, usually geographical points, usually (but not necessarily) measured along a straight line.
According to this question, the distance between Miami and Key Largo is 70 miles.
Miles and kilometers are both units of measurement for distance. The conversion factor is as follows:
1 mile = 1.609 kilometres
70 miles is equivalent to 70 × 1.609 = 112.65 kilometers
Therefore, the distance between Miami and Key Largo is 70 miles, this distance is equivalent to 112.65 kilometers.
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A 0.4042 g sample of a pure soluble bromide compound is dissolved in water, and all of the
bromide ion is precipitated as AgBr by the addition of an excess of silver nitrate. The mass of
the resulting AgBr is found to be 0.6797 g.
What is the mass percentage of bromine in the original compound?
%
70.80 % is the mass percentage of bromine in the original compound.
Mass of AgBr = 0.6797 g
Moles of AgBr = 0.6797 g / 187.77 g/mol
= 0.0036198 mol
Silver Nitrate + Bromine ---------> Silver Bromide + Nitrate
According to reaction, 1 mole of AgBr is obtained from 1 mole of bromide ions , then 0.0036198 moles of AgBr will be formed from :
1/1 * 0.0036198 mol = 0.0036198 mole of bromide ions
Mass of 0.0036198 moles of bromide ions :
0.0036198 moles * 79.09 g/ mol
= 0.2862 g
Mass of the sample = 0.4042 g
Mass percentage = 0.2862 * 100 / 0.4041
Mass percentage (%) = 70.80 %
Hence, the mass percentage of bromine in the original compound is 70.80%
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what percentage of a sample is remaining if you use the decimal (0.2536) and the fraction (3/7) of that sample
The percentage left is 57%.
What is the percentage remaining?We know that a fraction is a part of a whole. Let us in this case take the whole as one and then the fraction that we remove out of it is 3/7. We now have to find the percentage that remains.
Thus'
Fraction that remains = 1 - 3/7 = 4/7
Hence;
Percentage that is left = 4/7 * 100
= 57%
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Question in picture
Question in picture
The correct answer is a sphybridisation in z coordinate.So to form sphybridisation we need a s orbital and a p orbital .
In genomics, hybridization is the process by which two complementary single-stranded DNA or RNA molecules bond together to form a double-stranded molecule.The bonding is determined by the correct base pairing between the two single-stranded molecules. When one s and one p orbital in the same main shell of an atom combine to form two new equivalent orbitals, this is referred to as sphybridization.
The newly formed orbitals are known as sphybridized orbitals. It forms linear molecules with a 180° angle. Atomic orbitals include both s and p orbitals. These orbitals represent the most likely region in which we can find an electron of that atom. The primary distinction between s and p orbitals is that s orbitals are spherical in shape, whereas p orbitals are dumvell-shaped.So to form sp hybridisation we need a s orbital and a p orbital .
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A nugget of gold occupies 5.64 mL of water and weighs 108.8521g. Its density is
The density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
The density of a gold nugget can be calculated by using the following formula:
Density of nugget = Mass of gold nugget/Volume occupied by gold nugget
Here,
the mass of gold is given to be 108.85 grams and the volume occupied by gold is given to be 5.64 ml or 5.64 cm^3.
Putting these values in the above equation
Density = 108.85 g / 5.64 cm^3
Density = 19.29 g/cm^3
Thus, the density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
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A German automobile's gas mileage is 18km/L. Convert this quantity to miles per gallon.
Answer:
42
Explanation:
miles per gallon = kilometers per liter × 2.35
What data would be most helpful to support the claim that the population of a certain plant is dependent on the rainfall in its habitat?
OPTIONS
The average amount of water absorbed by the roots and given off by the leaves of these plants
The amount of water retained in the soil in the area where the plants live
Rainfall amounts and number of these plants in a certain habitat over several years
The heights and number of leaves produced by these plants under different moisture conditions
Explanation:
make up some of your own signs which can warns people about the dangers of river an ocean a large snake hiding in the bush
lim f(x) x-3 lim f(x) x-1– lim f(x) x-17+ lim f(x) x3 lim f(x) x5
how do I find the limits using graphs
Explanation:
try this option (all the details are in the attachment).
Give the meaning of the term electronegativity
Answer:
Electronegativity is the power of an atom (in a molecule) to attract electrons to itself. It increases from left to right in the periodic table.
Part C
Convert 8x10-4 kg to micrograms.
Express your answer with the appropriate units. Use the appropriate metric symbols for the units.
VO 5 ΑΣΦ
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Which of the following best describes a community?
• A. An interacting group of populations that occupy the same area
© B. A group of organisms that interbreed and have common
characteristics
• C. A group of organisms that interact with nonliving parts of the
environment
• D. All of the individuals of the same species that inhabit an
area
The following best describes a community
community is best describes as An interacting group of populations that occupy the same area
individuals of the equal species dwelling together contain a populationA network includes a doubtlessly interacting populations of different speciespopulation consists of individuals of the same species that live inside the same area, proportion the same habitat and sources, and probably interbreed with each other.A community and the nonliving elements with which it interacts is known as a ecosystemspecies is all of the populations of a particular type of organism.If a populace is experiencing exponential boom, it approach the larger the population, the faster it growsTo know more about population visit :
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9. The surface of the Moon is covered in craters, mountains, and———
plains from ancient volcanoes,
in Space
Moon geological research is based on observations made using telescopes on Earth, measurements made by spacecraft in orbit, lunar samples, and geophysical data.
Oxygen (O), silicon (Si), iron (Fe), magnesium (Mg), calcium (Ca), aluminum (Al), manganese (Mn), and titanium are among the substances known to exist on the lunar surface (Ti). The most plentiful ones include silicon, iron, and oxygen. The estimated oxygen concentration is 45%. (by weight). Due to solar wind deposition, carbon (C) and nitrogen (N) seem to be present only in very small amounts.
Impact craters, associated ejecta, a few volcanoes, hills, lava flows, and depressions filled with magma are the main features of the lunar surface.
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