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miss Akunina [59]
3 years ago
15

Barium has a body-centered cubic structure. If the atomic radius of barium is 222 pm, calculate the density of solid barium?

Chemistry
1 answer:
Flauer [41]3 years ago
5 0

Answer: density =3.377g/cm³

Explanation:

Density =( molecular weight × effective number of atoms per unit cell) / (volume of unit cell × avogadro constant)

D= (M ×n) /(V×A)

M= 137g/mol

n= 2 (For BCC)

V=a³ , where a= 4r/√3

a= (4×222)/√3

a=512.69pm

a= 512.69×10^-10cm

V= ( 512.69×10^-10)^3

V= 1.3476×10^-22cm³

D= (137×2)/(1.3476×10^-22 × 6.02^23)

D= 3.377g/cm³

Therefore the density of barium is 3.377g/cm³

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In photosynthesis, plants convert what type of energy into what other type of energy? please help
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Answer:

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3 years ago
How to I make a strength potion?
jolli1 [7]

Answer:

Hopefully this helps!

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4 0
3 years ago
How many grams of argon would it take to fill a large light bulb with a volume of 0.745 L at STP?
EastWind [94]

Answer:

Mass = 1.33 g

Explanation:

Given data:

Mass of argon required = ?

Volume of bulb = 0.745 L

Temperature and pressure = standard

Solution:

We will calculate the number of moles of argon first.

Formula:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

By putting values,

1 atm ×0.745 L = n × 0.0821 atm.L/mol.K× 273.15 K

0.745 atm. L = n × 22.43 atm.L/mol

n = 0.745 atm. L / 22.43 atm.L/mol

n = 0.0332 mol

Mass of argon:

Mass = number of moles × molar mass

Mass = 0.0332 mol × 39.95 g/mol

Mass = 1.33 g

8 0
3 years ago
A quality of gas under a pressure of 600.0mm Hg has a volume of 39.7 liters. What is it’s volume at standard pressure when the t
Leokris [45]

Answer:  it would be 23820 liters i dont know thats my best answer, hope it helps!

Explanation:

you have to multiply it or divide it.

Hope it helps!! :)

3 0
3 years ago
2 Points
user100 [1]

Answer:

B

Explanation:

She stopped for 4 minutes

She was decreasing in speed

3 0
3 years ago
Read 2 more answers
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