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alexdok [17]
3 years ago
9

386 g ÷ 20cm3 what is density

Chemistry
2 answers:
kondor19780726 [428]3 years ago
5 0
Density=mass/volume 
d=386g/20
d= 19.3g/cm
tatyana61 [14]3 years ago
3 0
22.3 is the answer to this question
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Answer:

70.77 g/mol is the molar mass of the unknown gas.

Explanation:

Effusion is defined as rate of change of volume with respect to time.

Rate of Effusion=\frac{Volume}{Time}

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Molar mass of unknown gas = M'

The rate of diffusion of gas, we use Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:

\text{Rate of effusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}

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M' = 70.77 g/mol

70.77 g/mol is the molar mass of the unknown gas.

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