A face centered cubic cell has an edge length of 495 pm. What is that atomic radius?
Answers
Answer:
r = ¼a√2
Explanation:
For a face centered cubic cell, which we call FCC, the atoms at the face diagonals touch each other.
Now, If we denote the edge length of cube to be "a" and the radius of the atom is denoted as "r", as seen in the attached FCC cell:
(√2)a = 4r
Divide both sides by 4 to get;
r = ¼a√2
Related Questions
Determine the number of particles present in 8.6 moles of Aluminum
Answers
Answer:
5,18*10^{24}
Explanation:
N=n*Na
N=8.6*6.02*10^{23}
N=5,18*10^{24}
A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C.
Solve the problem for the pressure of oxygen.
in kPa plz
Answers
Answer:
The pressure of gas in kilopascals is 55.9
Explanation:
variables given :
volume
temperature
moles
unknown variables :
pressure
Select the correct algebraic form for the equation to be used for this calculation.
p= nRT/V
Solve the problem for the pressure of oxygen.
Answer:
55.9 kPaPLEASE HELP ASAP I'LL MARK BRAINLIEST
Thank you :)
8. A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013.
Does this statement describe the meteor’s speed or velocity? 1pt
9. Why did you choose the answer above (explain why)? 1pt
Answers
Answer:
Its velocity was 7.8 km/s northward.
Explanation:
Because the meteor was only 45 m wide and was 27,700 km above Earth's surface it was not visible with the aid of a telescope.
In the cycle, after a new moon, _______________ means light appears on the _____________ side of the moon and continues to ________________.
Answers
Answer:
Explanation:
In the cycle, after a new moon, waxing means light appears on the right side of the moon and continues to increase.
(06.06 MC)
A gas has a mass of 3.82 g and occupies a volume of 0.854 L. The temperature in the laboratory is 302 K and the air pressure is 104 atm Calculate the molar
mass of the gas.
Answers
Answer:
Explanation:
3.12
Answer:
its 3.12
Explanation:
Pb(NO3)2
how do i solve this
Answers
You can see the periodic table one by one.
Pb(NO3)2 = PbN2O6
So there are
1Pb
2N
6O
and so you find the molecular mass from the periodic table and add all the numbers
Molacular mass of
Pb = 207
N = 14
O = 16
multiply it with the number of atoms
1Pb = 207 × 1 = 207
2N = 14 × 2 = 28
6O = 16 × 6 = 96
Molecular mass total = 207 + 28 + 96 = 331
So the molecular mass is 331.
Given the reaction: 2 H2 + O2 => O2 = 2 H2O.
What is the total mass of water formed when 497.80 g of oxygen reacts with hydrogen?
Answers
1:2 mol ratio so multiple by 2
= 31.1125 mol of water
Mass = mol x Mr
= 31.1125 x 18 = 560.025g
Which type of weathering occurred to form the Malham Pavement
Answers
Answer:
carbonation
Explanation:Please dont delete my answer again cause its correct, I had the same question on my test so I know its righ!!!!
The amount of matter in an object is ___ and a common unit is the ___.
A. mass, mL
B. volume, mL
C. volume, gram
D. mass, gram
Answers
Answer:
The answer is D
Explanation:
Mass is the amount of matter in an object and gram is the common unit of measurement of mass
Water can exist in all three states of matter.
Describe the arrangement and movement of particles in each of the three states of matter. Explain what happens to the particles in a liquid during boiling.
I'll give someone brainly and thanks if they answered the question correctly. 30 points!!
Answers
Answer:
The particles in a liquid move very quickly due to heat while it is boiling and gradually turns to gas
How do ionic bonds form between atoms?
Answers
Lightning storms trigger wildfires that burn up a lot of the plants and grasses in the ecosystem. Trees are mostly spared. what is the cause of this
Answers
Answer:
B
Explanation:
:)
Using the average atomic masses given inside the front cover of this book, calculate the number of atoms present in each of the following sample. a. 1.50 g of silver, Ag
b. 0.0015 mole of copper, Cu
C. 0.0015 g of copper, Cu
d. 2.00 kg of magnesium, Mg
e. 2.34 oz of calcium, Ca
f. 2.34 g of calcium, Ca
g. 2.34 moles of calcium, Ca
Answers
Answer:
c. 0.0015 g of coopet, cu
Explanation:
HELP NEEDED
How many nanoliters are in 1 liter. Show work
Answers
1 000 000 000 nanoliters
Helpppppppp I will mark brainliest
Answers
Answer:
9.8 m/s squared
Explanation:
HELP ASAP I will mark brainliest
Answers
Answer: The last one I think
Explanation:
Answer:
10623.0
Explanation:
Because 3541 is speed per hour
You need to find 3 hours
so multiply 3541 x 3
3541 x 3 = 10623
10623.0How many particles are present in a 56.9 mole sample of calcium hydroxide?
Answers
Answer:
Particles? Calcium hydroxide does not exist as discrete molecules, but as a network solid. The only way you would have separate particles, is if the calcium hydroxide was dissolved in a boatload of water. Ca(OH)2 is not all that soluble in water. Nonetheless, assume a lot of water, enough to dissolve 56.9 moles.
Ca(OH)2 --> Ca2+ + 2OH-
56.9 moles Ca(OH)3 x (3 moles ions / 1 mol Ca(OH)2) = 170.7 mol ions
==================
Percent composition of CuNO3......molar mass = 125.5 g/mol
Cu.... 1 x 63.5 / 125.5 x 100 = 50.6% Cu
N ......1 x 14.0 / 125.5 x 100 = 11.2% N
O .....3 x 16.0 / 125.5 x 100 = 38.2% O
(hope this helps can i plz have brainlist :D hehe)
Explanation:
The ion which forms from element 36 is known as
A. Krypton ion
B. Kryptonite
C. kryptonide ion
D. this ion does not exist
Answers
Krypton is a chemical element with the symbol Kr and atomic number 36.
How many atoms of oxygen are in 1.5 moles in H2SO4?
Answers
Answer:
In the given formula, there is 1 carbon atom and there are 2 oxygen atoms. So, in total there are 3 atoms.
Explanation:
For each of the following unbalanced equations indicate how many moles of the second reactant would be required to react exalt with 0.275 mole of the first reactant. Balance the equation.Co(s) + P4 (s) Co3P2 (s)
Answers
Answer:
0.183 mol
Explanation:
so balenced equation is 6Co+4P=2(Co3P2)
so so the ratio is 6:4
so .275/6*4
=0.183 mol I think
The Answer will be: 0.183 mol
so that the balanced equation is 6Co+4P=2(Co3P2) When the ratio is 6:4so that .275/6*4
=0.183 mol.
When According to the A balanced chemical is equation has been equal numbers of atoms that are for each element they are involved in the reaction and its represented on the reactant and its product sides.Also that This is a better requirement that makes the equation must be satisfied and also that to be consistent with the law of conservation of the matter. then It may occur that it is confirmed by simply summing the numbers of atoms and also molecules on it either side of the arrow and it's comparing these sums to ensure that they are equal.( 1 CO 2 molecule × 2 O atoms CO 2 molecule) + ( 2 H 2 O molecule × 1 O atom H 2 Molecule ) = 4 O atoms
Learn more about:
https://brainly.com/question/13719614
At 7 a.m., the science classroom had a temperature of 68˚F. By 3 p.m., the temperature had increased to 75˚F. Calculate the rate of temperature change from 7 a.m. to 3 p.m.
Answers
Hai!
I believe it would have to be 2.3.
Brainliest maybe?
what type of bond holds different water molecules together
Answers
How many grams of gasoline were
burned if 1.63 x 1023 molecules of
water were produced? Only report
number (no units) and use correct sig
figs.
Answers
Answer:
31.0 g C8H18
Explanation:
Gasoline is equivalent to C8H18
to convert molecule to gram you have to convert molecules to mols first.
Using Avocado's number we can figure that out.
(1.63 x 10²³ molecules C8H18) (1 mol C8H18/ 6.022 x 10²³) = 0.271 mols C8H18
Then we convert mols to grams using the molar mass of C8H18
C - 8(12.011) = 96.088 g/mol
H - 18(1.008) = 18.144 g/mol
add that together: 114.232 g/mol
(0.271 mol C8H18) (114.232 g/ 1 mol C8H18) = 31.0 g
31.0 g C8H18
P.S: SORRY IF THIS DOESNT HELP!! I dont know if they are talking about the actual formula for gasoline.
1)Water takes this form above 100c (solid, liquid or gas)
2) Water takes this form below 0c (solid, liquid, or gas)
3) Water takes this star between 0 and 100c (solid, liquid, or gas)
4) Water changes to this state above 100c (solid, liquid, or gas)
Science wasn’t a subject so I chose chemistry but this is for my science class
Answers
Answer:
I say the 1st one I'm so terrible sorry if I'm wrong
Explanation:
Water can take many forms. At low temperatures (below 0°C), it is a solid. When at “normal” temperatures (between 0°C and 100°C), it is a liquid. While at temperatures above 100°C, water is a gas (steam).
The state the water is in depends upon the temperature. Each state (solid, liquid, and gas) has its own unique set of physical properties.
Which of the following is not a part of the digestive system
A. Mouth
B.Esophagus
C.Intestines
D.Kidneys
Answers
Answer:
Kidneys •_•
Hope this helped <3
The rest of the choices are in the digestive tract
Which two types of waves require matter in order to travel?
О A. Light Waves
О B. Water Waves
О C. Electromagnetic Waves
О D. Sound Waves
Answers
Answer:
water waves and sound waves
A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?
Answers
Answer:
c6h6
Explanation:
Water can dissolve many other molecules.
Question 2 options:
True
False
Answers
Answer:
true
Explanation:
took the test
1. Which has the greater blue or indigo light?
Answers
Answer:
Indigo wavelength is between
420
and
450
nm.
Blue wavelength is between
450
and
495
nm.
So blue has a greater
λ
than indigo.
Explanation:
Answer:
Indigo has greater frequency.
Have a great day!
What is the percent composition by mass of suifur in Na2SO?
(Molar mass of Na2SO.= 142 g/mol)
Answers
Answer:
22.5%
Explanation
% composition = Molar mass of S
------------------------ x 100
Molar mass of Na2SO4
= 32.065
------------ x 100
142
=0.225 x 100
= 22.5%