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Alex777 [14]
3 years ago
10

It is found that 250 ml of gas at stp has a mass of .675 g what is the molar mass

Chemistry
1 answer:
katrin2010 [14]3 years ago
4 0

Answer:

61.3 g/mol  

Step-by-step explanation:

We can use the <em>Ideal Gas Law</em> to solve this problem:

       pV = nRT

Since n = m/M, the equation becomes

       pV = (m/M)RT     Multiply each side by M

    pVM = RT              Divide each side by RT

         M = (mRT)/(pV)

<em>Data: </em>

m = 0.675 g

R = 0.0.083 14 bar·L·K⁻¹mol⁻¹

T = 0 °C = 273.15 K

p = 1 bar

V = 250 mL = 0.250 L

<em>Calculation: </em>

M= (0.675 × 0.083 14 × 273.15)/(1 × 0.250)

M= 15.33/0.250

M= 61.3 g/mol

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