Question

Compute the weight (mass) of 6.00L of ammonia gas, nh3, STP

Answer 1

weight of ammonia is 4.55 gram

Answer 2

The mass of ammonia gas for given amount at STP is 4.556 grams

Explanation:

We are given:

Volume of ammonia gas = 6.00 L

At STP:

22.4 L of volume is occupied by 1 mole of a gas

So, 6.00 L of volume is occupied by = $\frac{1}{22.4}\times 6=0.268mol$ of a gas

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of ammonia = 17 g/mol

Moles of ammonia = 0.268 moles

Putting values in above equation, we get:

$0.268mol=\frac{Mass of ammonia}}{17g/mol}\\\\\text{Mass of ammonia}=(0.268mol\times 17g/mol)=4.556g$

Learn more about STP:

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