the physical properties of minerals result from their ____?
Answer: Internalized Crystal Structure
Explanation:
"The exact and unique arrangement of atoms, ions or ionic groups is the characteristic feature of each crystallized mineral."
- S.K. Haldar & Josip Tisljar, authors of Mineralogy and Petrology
A mineral's unique and specific crystal structure determines the physical properties such as color, hardness, density, luster, crystal form, cleavage and fracture.
A car is traveling 65.0 miles per hour. Convert this to meters per second.
Answer:
29.0576
Explanation:
To convert miles per hour to meters per second you divide the speed value by 2.237.
The U.S. Environmental Protection Agency (EPA) sets limits on
healthful levels of air pollutants. The maximum level that the EPA
considers safe for lead air pollution is 1.5 μg/m³
By applying Avogadro's constant, the number of lead atoms present in your lungs is equal to 2.49 × 10¹³ atoms of lead.
What is a conversion factor?A conversion factor can be defined as a number that is typically used to convert (change) a number in one (1) set of units to another, either by dividing or multiplying.
Generally speaking, an appropriate conversion factor to an equal value must be used when it is necessary to perform any mathematical conversion.
Conversion:
1.5 μg lead = 1 m³ of air.1 m³ = 1000 Liters (L)1 mole of lead = 207.2 grams of lead.1 gram (g) = 10⁶ microgram (μg).1 mole of lead = 6.022 × 10²³ lead atoms.Next, we would convert the volume of lungs in liters to meter cube (m³):
Volume of lungs = 5.6/1000
Volume of lungs = 5.6 × 10⁻³ m³.
Assuming the whole volume of lungs is filled with air, the number of lead atoms present is given by:
Number of lead atoms = 5.6 × 10⁻³ × 1.5
Number of lead atoms = 8.55 × 10⁻³ μg of lead.
Next, we would convert the mass of lead into moles of lead as follows:
Moles of lead = 8.55 × 10⁻³ × 1/207.2 × 1/10⁶
Moles of lead = 8.55 × 10⁻³/(207.2 × 10⁶)
Moles of lead = 4.13 × 10⁻¹¹ mole of lead.
Finally, we would determine number of lead atoms present by using Avogadro's constant:
Number of lead atoms = 4.13 × 10⁻¹¹ × 6.022 × 10²³
Number of lead atoms = 2.49 × 10¹³ atoms of lead.
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Complete Question:
The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants. The maximum level that the EPA considers safe for lead air pollution is 1.5 μg/m³. If your lungs were filled with air containing this level of lead, how many lead atoms would be in your lungs? (Assume a total lung volume of 5.60 L.)
how many moles are present in 1.0 m3 O2 at STP
Answer:
Explanation:0.089mol
at STP 22.4l of any ideal gas is the volume of one mole which means the number of moles in 02 is222.4=0.089.
Forest food web………….
Forest Food web consists of the producers, main consumers, secondary consumers, scavengers, and decomposers. Food web is the collection of the large number of food chains.
What are some examples of food webs?Numerous food chains make up a food web. As animals seek food, a food chain only follows one way. As an example, a hawk consumes a snake following the consumption of a frog, a grasshopper, and grass. A food web illustrates the numerous relationships between plants and animals.
What are the different types of food web?1. Primary consumers
2. Secondary consumers
3. Tertiary consumers
4. Decomposers or phytoremediators
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Concerning the rate law, Rate = K[A]²[B], what are appropriate units for the rate
constant k?
The correct answer is M^-1s^-1.
The proportionality constant in the rate law expression, known as the rate constant or the particular rate constant, represents the relationship between the rate of the reaction and the concentration of the reacting species. Because it equals the rate of the reaction when the concentration of the reactants is assumed to be unity, it is known as the specific rate constant. The speed and direction of a chemical reaction are measured by a reaction rate constant. We are aware that the values of the Rate constant vary with temperature.
The given rate law is:
Rate = k[A][B]
The units of rate are always Ms^-1 and the units of [a] are mol so: mol*s^-1
Putting the units in the given rate law:
Rate = k[A][B]
Ms^-1=k×(M)×(M)
k=Ms^-1/M^2
k=M^-1s^-1
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Write an equation that shows the formation of the bromide ion from a neutral bromine atom.
The equation that shows the formation of the bromide ion from a neutral bromine atom is as follows: Br + e- → Br-
What is an ion?Ion is the atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
An atom becomes an ion when it loses or gains electrons.
According to this question, bromine atom is neutrally charged but quicky becomes charged into an ion when it gains one electron. The equation is represented as follows:
Br + e- → Br-
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Order these materials from best to worst conductors of heat
Chalk, Air, Iron, stainless steal, copper, concrete, diamond and oak.
Answer:copper,stainless steel,iron,diamond,oak,calk,air
Explanation:your metlas is your meterials that absorbs most heat'
If the bond length in a XY molecule is 212,
what will be the covalent radius of atom X, if
the covalent radius of Y atom is 93.
O
119
2.27
128
3
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 typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid. convert to grams
A typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid and 321 mg makes 0.321 g.
Define Aspirin.The nonsteroidal anti-inflammatory medicine (NSAID) aspirin, often referred to as acetylsalicylic acid (ASA), is used to treat a variety of inflammatory disorders by lowering pain, fever, and/or inflammation. These conditions include Kawasaki disease, pericarditis, and rheumatic fever.
Long-term usage of aspirin is also used to help those at high risk avoid further heart attacks, ischemic strokes, and blood clots. Effects of pain or fever often start within 30 minutes. Aspirin functions similarly to other NSAIDs but also inhibits platelet function.
What risks does aspirin pose?Your doctor should be consulted when deciding whether or not to take aspirin because it depends on your cardiovascular risk, according to Wong. While aspirin is often taken safely by many people, it can also result in life-threatening stomach, intestinal, and brain bleeding.
convert mg to gram1 mg = 1/1000 g
so,
321 mg = 321/ 1000g
= 0.321g
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I need help please:
Zootopia:
This movies theme is on stereotypes within culture and the influence police have on the Publics perception. Explain how this can happen and it’s impact on civil and criminal justice.
Answer:
down below
Explanation:
The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.
What is concentration of N2O5 in the following first order reaction in which the rate is 2.4*10^-5 mole/L and rate constant is 3 * 10 ^ - 5 * S ^ - 1 ?
0.8mole/L is concentration of N2O5.
As the reaction is first order ,
so the order with respect to N2O5 is 1.
general,
Rate of equation is written as
rate = k [N2O5]^1
k is the rate constant = 3 * 10 ^ - 5 * S ^ - 1
rate = 2.4*10^-5 mole/L
N2O5 is concentration term
2.4*10^-5 mole/L = 3 * 10 ^ - 5 * S ^ - 1 [ N2O5]
N2O5 = [0.8 mole/L]
=0.8mole/L
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What new combined branch of study was developed from the
study of matter within living systems?
According to the research, the correct option is Biochemistry. It is a new combined branch of study that was developed from the study of matter within living systems.
What is Biochemistry?It is an integrating science or scientific discipline that studies at the molecular level the characteristics and functions of the chemical components of living beings.
In this sense, it is responsible for the study of substances such as proteins, lipids, carbohydrates that are present in living organisms and the fundamental chemical reactions for vital processes.
Therefore, we can conclude that according to the research, the correct option is Biochemistry. It is a new combined branch of study that was developed from the study of matter within living systems.
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Calculate the density, in g/mL, of a liquid that has a mass of 0.115 g and a volume of 0.000275 L.
Density of the liquid is 0.418g/mL
The liquid sample has a volume of 0.000275 L. We can convert this to mL (because we are asked to find the density in g/mL):
mass of liquid= 0.115 grams
volume of the liquid, V= 0.000275L
Density is defined as the ratio of mass per unit volume
Now we must convert the unit of volume from L to ml as liter is SI unit which goes with Kilogram
volume in ml = 0.000275 ml/l x 1000 =0.275 ml
Density d = mass/volume
= 0.115/ 0.275
= 0.418 g/mL
Hence the density of the liquid is 0.418 g/mL
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Which process allows liquid water on the surface to enter the atmosphere?
evaporation
condensation
sublimation
transpiration
What is Judy Hopps reception like once she joins the Zootopia police force? Why is this?
Can somebody please help me
Answer:
A.
Explanation:
Spiders are creepy.
That your answer.
What is the chemical equation for frying an egg
The given chemical reaction is :
Calcium Oxide (s) + Water (l) → Calcium Hydroxide (s)
Molecular Changes : A chemical reaction is one in which the replying substances experience changes at the molecular position. This means that bonds between tittles of the reactants are broken, and tittles are changed or rearranged to produce commodity new. Chemical reaction can be reversible or unrecoverable.
What happens when frying an egg ?
Frying an egg is a chemical response. It's an illustration of an endothermic response or bone that takes in heat to make the response do. An egg is made up of proteins and water, and the thralldom also contains fat. When an egg is hotted , the proteins begin to change their structure. Protein motes are veritably complex, made up of long chains of structure blocks called amino acids. These chains are also folded and twisted to make complicated molecular structures. Hotting the egg adds energy, which causes the motes to begin to move and lose their shape. Bonds holding the shape of the protein motes together begin to break, unfolding the proteins and allowing them to spread out. New bonds are formed, and water evaporates out of the egg, changing it into a semi-solid. The egg has experienced anon-reversible chemical response, as it can not be changed back into its raw state.
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What are the characteristics of a metallic bond?
A. Electrons are shared unequally between two atoms.
B. Electrons move freely among positively charged ions.
C. Electrons are shared equally between two atoms.
OD. Electrons are transferred from one atom to another.
Answer: my answer would be a
Explanation: so i did some research and all of it came up with the answer (A).
Determine the type of investigation.
How does an iPod receive messages?
comparative
none is correct
experimental
descriptive
Answer:
comparative
Explanation:
The massage just pop on the ipod
2013 Cengage Learning
3. A student measured the dimensions of a table and recorded the length as 103.50 cm and the width
as 73.75 cm. According to the student's calculator, the area is 7633.125 cm². What value should the
student report as the area? Explain your answer.
Dimensions of a table and recorded the length as 103.50 cm and the width
as 73.75 cm
AREA = L × B
AREA = 103.50 × 73.75
area = 7,633.125 cm²
but the student should report 7633 cm² because the width measurement (73.75 cm) has 4 significant figures while the length measurement (103.50 cm) has 5 significant figures and when multiplying the answer should have the same number of significant figures as the number with the least number of sig figs.
Significant Figures can help determine the accuracy of a number by the number of significant figures it contains.so the correct answer should be 7633 cm².
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Which of the following statements correctly describes density?
Answer:
Helper
Explanation:
is the expaltin of the explatin
How do you find the number of
electrons in a neutral atom?
Hydrogen has one electron, helium has two electrons, and lithium has three electrons. Hydrogen and lithium are both reactive, but helium is unreactive. How could the quantum mechanical model of the atom explain this pattern of behavior?
The valence shell of an atom if completed octet or the maximum number of electrons it can fill then it will be stable. Helium is not reactive because it is highly stable and its valence shell is fully filled.
What is helium?Helium, is the second element in the periodic positioned in the noble gas group. It have an electronic configuration of K=2. The only orbital it have is K and it is completely filled. That's why it is stable.
According to quantum mechanical model of atom, each orbital have a certain capacity to accommodate electrons and an orbital is considered as a wavefunction.
When the valence orbitals fulfill the electrons, then the atom is no longer need an electron or never donate from the completely filled state. Hence it becomes unreactive.
The valence shell of hydrogen and lithium is not completely filled and they are reactive to gain electron to attain stability. Therefore, helium is unreactive because of its stability.
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Kp equals 25 at 500c. The pressure of butane is 20. atm and isobutane is 0.0 atm Calculate the pressure of both gases at equilibrium.
The pressure of butane is 20 P(butane) = 0.77 atm and pressure of P(isobutane) = 19.2 atm
Isomerization reactionIsomerization is the transformation of a molecule into a different isomer, and it can take one of two forms: cis or trans. Protein isomerization was first described in 1968 as a method of dramatically altering protein conformation by disrupting polypeptide secondary structure.
Isomerism is caused by two main factors: Difference in atom linking mode. Difference in the spatial arrangement of atoms or groups. The difference in the mode of atom linking is one of the two main causes of isomerism. Difference in the spatial arrangement of atoms or groups.
Types :The two main types of isomerism are structural or constitutional isomerism, in which the bonds between the atoms differ, and stereoisomerism or spatial isomerism, which occurs when the bonds are similar but the relative positions of the atoms differ.
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I understand the question you are looking for
For the isomerization reaction:
butane ⇌ isobutane
Kp equals 25 at 500°C. If the initial pressures of butane and isobutane are 20. atm and 0.0 atm, respectively, what are the pressures of the two gases at equilibrium?
A) P(butane) = 20 atm and P(isobutane) = 0.80 atm
B) P(butane) = 19.2 atm and P(isobutane) = 0.77 atm
C) P(butane) = 0.77 atm and P(isobutane) = 19.2 atm
D) P(butane) = 0.80 atm and P(isobutane) = 20. atm
Give the electron configuration using the crystal field theory of the following complexes and show your configuration in the the crystal field diagram (N.B calculate the oxidation number of metals 1st).
1. [Co(NH3)5Cl]Br2
2. Na3[Fe(CN)6]
The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
What is the crystal field theory?According to the crystal filed theory, the ligands serve as point charges and when they are introduced to the symmetrical octahedral crystal field, the field splits and the there is a barry center with electrons that are above and below the barry center depending on their energy.
Hence, we can see that cobalt II ion is a d7 specie with electron configuration; [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^7[/tex]. The iron III ion is a d5 specie having electron configuration[tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^5[/tex]. The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
The crystal field diagram of each of the ions is shown in the image attached.
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Help help help please
Question 9(Multiple Choice Worth 2 points)
(03.01 LC)
Which of the following is an example of matter?
O Electricity
O Heat
O Sound
O Water
Calculate the ratio of the mass ratio of S to O in SO to the mass ratio of S to O in SO2 . Consider a sample of SO in which the mass of S = 32 g and the mass of O = 16 g . Assume that in SO2 that there is also 32 g of S .
The correct answer is The mass ratio of S to O in SO divided by the mass ratio of S to O in SO2 is 2 :1.
When two elements can combine to form two or more different compounds, the mass of one element compared to the fixed mass of the other will always be in a ratio of small whole numbers.
As we all know,
Oxygen mass = 16 g
Sulfur mass = 32 g
Sulfur mass in SO = 32 g
The mass of oxygen in SO is 16 g.
Sulfur to oxygen mass ratio in SO =..... (1)
Sulfur mass in SO2 = 32 g
Oxygen mass in SO2 = (2 16)g = 32 g
Sulfur to oxygen mass ratio in SO2 =..... (1)
The S/O ratio in SO is 2: 1.
The S/O ratio in SO2 is 1: 1.
Taking the ratios 1 and 2, we get:
the mass ratio of S to O in SO to mass ratio of S to O in SO2 is 2 : 1
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How many moles are in 9.27 x 10^22 atoms of silicon
The number of moles are in 9.27 x [tex]10^{22}[/tex] atoms of silicon is 0.153
The number of atoms is given as follows;
Atoms= nxNa
9.27x[tex]10^{22}[/tex]=nx6.022x[tex]10^{23}[/tex]
n=9.27x[tex]10^{22}[/tex]/6.022x[tex]10^{23}[/tex]
n=1.53x[tex]10^{-1}[/tex]
n=0.153
The number of moles n, is 0.153
The International System of Units uses the mole (symbol: mol) as the unit of material quantity. The number of elementary entities of a certain substance are present in an item or sample is determined by the quantity of that material.The mole, symbol mol, is the unit of amount of substance.Mole is a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, ions, etc.To learn more about mole visit:
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