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4 years ago

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If the mass of a material is 75 grams and the volume of the material is 16 cm3, what would the density of the material be?

2 answers:

DedPeter [7]4 years ago

8 0

Answer:
density = 4.6875 gm / cm³

Explanation:
Density of the material can be calculated using the following rule:
Density = mass / volume

We are given that:
mass = 75 grams
volume = 16 cm³

Substitute with the givens in the above equation to get the density as follows:
density = mass / volume
density = 75 / 16
density = 4.6875 gm / cm³

Hope this helps :)

qwelly [4]4 years ago

7 0

P=75/16=4.6875 g/cm³

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The question is incomplete, here is the complete question:

Gaseous compound Q contains only xenon and oxygen. When a 0.100 g sample of Q is placed in a 50.0-mL steel vessel at 0°C, the pressure is 0.229 atm. What is the likely formula of the compound?

A. XeO

B. $XeO_4$

C. $Xe_2O_2$

D. $Xe_2O_3$

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<u>Explanation:</u>

To calculate the molecular mass of the compound, we use the equation given by ideal gas equation:

PV = nRT

Or,

$PV=\frac{w}{M}RT$

where,

P = Pressure of the gas = 0.229 atm

V = Volume of the gas = 50.0 mL = 0.050 L (Conversion factor: 1 L = 1000 mL)

w = Weight of the gas = 0.100 g

M = Molar mass of gas = ?

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = Temperature of the gas = $0^oC=273K$

Putting value in above equation, we get:

$0.229\times 0.050=\frac{0.100}{M}\times 0.0821\times 273\\\\M=\frac{0.100\times 0.0821\times 273}{0.229\times 0.050}=195.4g/mol\approx 195g/mol$

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Answer:

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Answer:

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