Cromium and tantalum both have the BCC crystal structure, and Ta forms a substitutional solid solution for all concentrations at room temperature. Compute the unit cell edge length for a 26 wt% Cr - 74 wt% Ta alloy. The room-temperature density and atomic weight of Cr are 7.19 g/cm3 and 52.00 g/mol, the room-temperature density and atomic weight of Ta are 16.6 g/cm3 and 180.95 g/mol, respectively.
Answer:
0.3139 nm
Explanation:
First of all, let's Calculate the average density of the Cr −Ta alloy;
Formula to get it is;
ρ_avg = 100/[(C_cr/ρ_cr) + (C_ta/ρ_ta)]
We are given;
C_cr = 26%
C_ta = 74%
ρ_cr = 7.13 g/cm³
ρ_ta = 16.6 g/cm³
Thus;
ρ_avg = 100/[(26/7.13) + (74/16.6)]
ρ_avg = 12.34 g/cm³
Similarly, let's Calculate the average atomic weight;
A_avg = 100/[(C_cr/A_cr) + (C_ta/A_ta)]
We are given;
A_cr = 52 g/mol
A_ta = 180.95 g/mol
Thus;
A_avg = 100/[(24/52) + (74/180.95)]
A_avg = 114.88 g/mol
Formula for the volume of the unit cell is;
V = n(A_avg)/(N_A × ρ_avg)
Where;
n is number of atoms in the cell which in this case = 2
N_A is avogadro's number = 6.022 × 10^(23)
Thus;
V = (2 × 114.88)/(6.022 × 10^(23) × 12.34)
V = 30.92 × 10^(-24) cm³
Length of the unit cell edge length is given by the formula;
a = ∛V
Thus;
a = ∛(30.92 × 10^(-24))
a = 0.00000003139 cm
Converting to metre, we have;
a = 0.3139 × 10^(-9) m = 0.3139 nm
HELP ILL MARK BRAINLIEST
What makes a White Dwarf Star different from Main Sequence, Giant, and Supergiant stars?
Answer:
Formation. Main-sequence stars, including the sun, form from clouds of dust and gas drawn together by gravity. ... The core that is left behind will be a white dwarf, a husk of a star in which no hydrogen fusion occurs. Smaller stars, such as red dwarfs, don't make it to the red giant state.
Explanation:
36) Which element is larger?
Potassium (K)
or
Calcium (Ca)
37) Which element is larger?
Magnesium (
Mg)
or
Calcium (Ca)
38) Which element is more electronegative?
Oxygen (0)
or
Fluorine (E)
39) Which element is more electronegative?
Chlorine (CD)
or
Fluorine (F)
40) Which element has a higher ionization energy?
Silicon (SI)
or
Phosphorus (P)
41) Which element has a higher ionization energy?
Nitrogen (N)
or
Phosphorus (P)
42) Which element is more reactive?
Sulfur (S)
or
Chlorine (CI)
43) Which element is more reactive?
Potassium (K)
or
Calcium (Ca)
36 ) Potassium
37 ) Calcium
38 ) fluorine
39 ) fluorine
40 ) Phosphorus
41 ) Phosphorus
42 ) Sulphur
43 ) Sodium
How heavy is a gallon of water
Answer:
Approximately 8.3 pounds.
Explanation:
LO
82
KE<200 after three years and Rs.
82. Compound interest. The
A sum of money becomes Rs.
4400 after six years on
is:
400482.82 KF
32017, KF0018?
00018282 KF0018282 KF0018282 K
SKO 282 KF0018282 KF001Non KF0018
018282'KF0018282 KF0018
R 00786 2 KF00182825
0182
500182
82 KF0018282 KF
Answer: Rs. 1,100
Explanation:
Compound interest calculation at three years:
2,200 = Amount * (1 + r) ³
Compound interest at six years.
4,400 = Amount * (1 + r) ⁶
Divide them to eliminate variables:
4,400/ 2,200 = (Amount * (1 + r) ⁶) / (Amount * (1 + r) ³)
2 = (Amount * (1 + r) ³)
If (Amount * (1 + r) ³ is 2 then Amount at 3 years is:
2,200 = Amount * 2
Amount = 2,200 / 2
= Rs. 1,100
The theoretical yield of Baso, is 58.35 g. If 44.34 g of BaSO4 are produced from the reaction shown above, what is the percent yield of Ba50_?
BaCl2(aq)+Na2SO4(aq)—>2NaCl(aq)+BaSO4(s)
a85.17%
b75.99%
c31.67%
d52.03%
Answer:75.99
Explanation:saw it on quizlet
When the theoretical yield of Baso, is 58.35 g And, there is 44.34 g of BaSO4 are produced so the percent yield is option b 75.99%.
Calculation of the percent yield:Since
The theoretical yield of Baso, is 58.35 g. And, there is 44.34 g of BaSO4 are produced
So, here the percent yield is
= Actual yield / theoretical yield
= 44.34 / 58.35
= 75.99%
Hence, the option b is correct.
Learn more about reaction here: https://brainly.com/question/4241156
You explored the relationship between molarity, the number of moles, and solution volume. However, when you prepare a solution, you are unable to directly measure the number of moles of solute. Instead, you can mass the solute and convert between the number of moles and mass using the molar mass of a substance as a conversion factor. The molar mass of a substance can be calculated based on its molecular formula; otherwise, it can be calculated from the mass and number of moles as follows: Molar Mass = Mass solute (in g)Moles solute In order to prepare a certain volume of solution with a desired concentration, you would need to determine the required mass of solute. What mass of CaCl2 would you need to prepare a 100. mL solution at a concentration of 0.240 M ? Express the mass in grams to three significant figures.
Answer:
2.64gram
Explanation:
Molarity, which refers to the molar concentration, is calculated thus:
Molarity = number of moles (n) ÷ volume (L)
According to the question, volume = 100 mL, molarity = 0.240 M.
Since 1L = 1000mL
100 mL = 100/1000
= 0.1L
Hence;
0.240 = n/0.1
n = 0.1 × 0.240
n = 0.024mol
Mole = mass/molar mass
Molar mass of CaCl2 = 40 + 35.5(2)
= 40 + 71
= 111g/mol
mass = molar mass × mole
mass = 110 × 0.024
Mass = 2.64gram
What type of reaction is AB+C=CB+A
which of these is not a process of chemical weathering?
1.cracked sidewalk.
2.wearing away of the inscriptions on a New York City Monument.
3.Rusty Nail.
4.dissolving of limestone which makes caves.
What is an electrolytic cell?
Answer:
An electrolytic cell is a cell that converts electrical energy into chemical energy.
Any device in which electrical energy is converted to chemical energy or vice versa is referred to as an electrolytic cell. A typical cell consists of two metallic or electronic conductors held apart and in contact with an electrolyte, which is usually a dissolved or fused ionic compound.
What is an electrolytic cell ?An electrolytic cell is a type of electrochemical cell that uses an external source of electrical energy to force a chemical reaction that would not occur otherwise. A voltage applied between the cell's two electrodes, an anode and a cathode immersed in an electrolyte solution, serves as the external energy source.
Electrons in the form of an electric current are deliberately pumped through the chemicals in the section to induce an oxidation-reduction reaction. An electrolytic cell is a setup used to electrolytically decompose water into hydrogen and oxygen.
Electrochemical cells that generate an electric current are known as voltaic or galvanic cells, whereas those that generate chemical reactions, such as electrolysis, are known as electrolytic cells.
Thus, Any device in which electrical energy is converted to chemical energy or vice versa is referred to as an electrolytic cell.
To learn more about electrolytic cell, follow the link;
https://brainly.com/question/4030224
#SPJ5
Which represents the overall (net) reaction of this mechanism: step 1: H2O2 + I- → H2O + OI- step 2: H2O2 + OI- → H2O + O2 + I- Note that I- acts as a catalyst in this reaction.
A. 2H2O2 → 2H2O + O2
B. H2O2 → H2 + O2
C. H2O2 + I- → OI- + H2O
D. H2O2 + OI- → H2O + O2 + I-
Answer:
A. 2H₂O₂ → 2H₂O + O₂
Explanation:
1. H₂O₂ + I⁻ → H₂O + OI⁻2. H₂O₂ + OI⁻ → H₂O + O₂ + I⁻If we make a net sum of both reactions, we're left with:
H₂O₂ + I⁻ + H₂O₂ + OI⁻ → H₂O + OI⁻ + H₂O + O₂ + I⁻Grouping species:
2H₂O₂ + OI⁻ + I⁻ → 2H₂O + OI⁻ + O₂ + I⁻There is OI⁻ at both sides, so it is eliminated -same goes for the catalyst, I⁻-.
2H₂O₂ → 2H₂O + O₂Thus the answer is option A.
The center part of an atom is called the
Answer: Nucleus (Hope it is Right!)
Given the atomic mass of select elements, calculate the molar mass of each salt.
Element Molar mass
(g/mol)
Beryllium (Be) 9.012
Magnesium (Mg) 24.31
Cobalt (Co) 58.93
Cadmium (Cd) 112.41
Bromine (Br) 79.90
Match the numbers to the appropriate blanks in the sentences below. Make certain each sentence is complete before submitting your answer.
View Available Hint(s)
ResetHelp
1. The molar mass of MgBr2 is The molar mass of M g B r 2 is blank..
2. The molar mass of BeBr2 is The molar mass of B e B r 2 is blank..
3. The molar mass of CoBr2 is The molar mass of C o B r 2 is blank..
4. The molar mass of CdBr2 is The molar mass of C d B r 2 is blank..
Is water made of plant cells or animal cells
•plant
•animals
•niether
Answer:
i think niether
Explanation:
How many particles are in 4g of NaCl? (1mol of NaCl = 58g) – 2 step conversion
Answer:
4.16 * 10²⁴ particles
Explanation:
1. We convert from grams to moles
4 g NaCl / 58 g of NaCl = 0.0689655172 moles
-> 0.0690 moles
2. Now we will convert from moles to particles by multiplying by avogadro's number..
0.0690 * 6.022 *10²³ = 4.15518 * 10²⁴ particles or 4.16 * 10²⁴ particles
Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.
How might a rock form very quickly, and then remain stable, or unchanged, for a very long period of time? Include a specific example in your explanation.
Answer:
igneous rocks
Explanation:
One type of rock that forms very quickly would be igneous rocks. These are rocks that form after a volcanic eruption, where the molten magma melts everything into lava which then hardens shortly after. This creates a new rock that is a mixture of many other materials called Igneous rocks. Once hardened they usually remain stable and unchanged for a very long time until the next volcanic eruption. An example if the eruption of Tambora which after finishing has created lots of igneous rocks and has not erupted again since 1815.
A rock form easily through volcanic eruption, and remain stable, or unchanged, for a very long period of time because of strong bonding in constitute minerals.
What is rock?Rock is a solid substance which is naturally occur in the environment, it is made up from minerals. Mainly three types of rocks are present, which are igneous rock, metamorphic rock and sedimentary rock.
We obtain rocks generally by the volcanic eruption and as it is made up of minerals and different minerals have different crystal structure and bonding in these minerals are very strong which not break easily. That's why rocks remain stable or unchanged for a very long time. Only volcanic eruption will break rocks because only they have that much of energy to break. Examples of hard rocks are granite, syenite, unikite, andesite, etc.
Hence, due to strong bonds rocks will stay stable for long time.
To know more about hard rocks, visit the below link:
https://brainly.com/question/7475939
The primary source of chemical energy in the body is
ADP
Ο ΑΤΡ
Ο Ο Ο Ο
O DNA
O AMP
How many moles are in a solution if I have 2.21 M of NaCl in 1.14 L?
A.1.12 mol
B.2.52 mol
C.4.15 mol
D.7.89 mol
Answer:
The correct answer is B.2.52 mol
Explanation:
The molarity of a solution (M) expresses the number of moles of solute there is in 1 liter of solution. If we have the molarity (M) and the volume in liters (L), we simply multiply M x V to obtain the moles, as follows:
M = 2.21 = 2.21 moles/L
V = 1.14 L
M x V = 2.21 moles/L x 1.14 L = 2.5194 moles ≅ 2.52 moles
Antonio and Addie want to know if perfume fumes affect plant height. They place five identical bean plants in five identical light boxes. In four of the boxes, they place 200 milliliters (mL) of perfume at different distances from the plants, and they make observations twice a week for one month. Which choice best identifies the observation data that should be included in their data table?
Answer:
I think its C I'm sorry if I'm wrong good luck guys!
Explanation:
How can scientists make orange juice smell pleasant?
Use Avogadro's number, 6.02E23, to calculate the number
of particles found in 0.004 moles of carbon dioxide
CO2
Answer:
2.408 × 10²¹ is the correct answer!!K2HPO4 is a highly water-soluble salt. It can be used as a buffering agent, food additive, or
fertilizer. The neutralization of phosphoric acid with potassium hydroxide can be used to form
potassium hydrogen phosphate.
H3PO4 + 2KOH K2HPO4 + 2H2O
100 g of phosphoric acid (H3PO4) is reacted with excess potassium hydroxide. The final mass
of K2HPO4 produced is found to be 163 g.
What is the percent yield?
Answer:
91.7%
Explanation:
The percent yield when it could be used as a buffering agent should be considered as the 91.74%.
Calculation of the percent yield:Since we know that
Number of moles = Mass in gram / Molar mass
And,
Molar mass of H3PO4 = 97.994 g/mol
So,
Number of moles of H3PO4
= 100 g / 97.994 g/mol
= 1.02 mol
Now
Molar mass of K2HPO4 = 174.2 g/mol
So,
Theoretical yield of K2HPO4 = 174.2 g/mol * 1.02 mol
= 177.684 g
So finally
Percent yield = Actual yield * 100 / Theoretical yield
= 163 g * 100 / 177.684 g
= 91.74%
hence, The percent yield when it could be used as a buffering agent should be considered as the 91.74%.
learn more about percentage here: https://brainly.com/question/14849541
The osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant R. Suppose the osmotic pressure of a certain solution is measured to be 20.atm at an absolute temperature of 321.K. Write an equation that will let you calculate the molarity c of this solution. Your equation should contain only symbols. Be sure you define each symbol other than R.
Answer:
20 atm / (R . 321 K . i) = M
Explanation:
Osmotic pressure is a colligative property which is determined by the solute.
Solutes over solutions, can increase the osmotic pressure which is calculated like this:
P = M . R . T
where P is pressure, M is molarity, R the Universal Constant Gases and T, the absolute Temperature. We also have to consider the Van't Hoff factor, i, numbers of ions dissolved. Ionic salts determine more osmotic pressure than organic compounds, where i = 1. Then, the complete formula is:
π = M . R . T . i
To determine molarity, osmotic pressure divide all the terms:
20 atm / (R . 321 K . i) = M
R = 0.082 L.atm/mol.K
If you see all the units in R, they will be cancelled, so finally the answer will be mol/L, which is molarity. The i term has no unit!.
#3. How does a fever aid an immune response?
Answer:
it can tell and show what pathogen is in you as well what type and mutation so then your body can fight back and remember the genetic dna so then you will be immune in some way.
Explanation:
Question;
How does a fever aid an immune response?
Answer:
One type of immune cell jumps into the fray after body temperature rises, according to experiments in mice. A fever fights infection by helping immune cells to crawl along blood-vessel walls to attack invading microbes
what is the chemical equation for methamphetamine
Answer:
C10H15N is the chemical equation for methamphetamine
Please help it really important, I will mark brainliest please
Answer:
S0rRy i d0nT kn0w fRenCh
2 CuCl2 + 4 KI → 2 CuI + 4 KCl + I2
When 13.5 moles of CuCl2 reacts with 19.86 moles of KI, how many moles of I2 are formed?
Answer: 6.75 moles
Explanation:
This is a simple stoichiometry proboe. that I would set up like this:
(13.5 moles CuCI2) (1 mol I2 / 2 moles CuCi2)
That means you all you have to do for this problem is divide by 2 and cancel out the unit moles CuCI2, which leaves you with 6.75 moles I2.
Hope this helps :)
Choose the combination of factors that creates fog. Record the description of the factors in the Student Guide,
Relative Humidity
Air Temperature
Air Pressure
Check
Pause
Answer:
Relative Humidity
Air Temperature
Explanation:
Relative humidity and air temperature are the factors that creates fog. When the moist and warm air makes contact with the cooler air, water vapor condenses due to low temperature of that region that causes for the formation of fog. So we can say that relative humidity and air temperature are the main factors for the formation of fog in that region.
Answer:
High Cold High
Explanation:
The undersea mountain chain where magma rises from and where new ocean floor is produced is called?
Answer:
mid-ocean ridges
Explanation:
Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.