Answer :

Final answer:

The weight of 6.00L of ammonia gas at STP is calculated to be 4.59g using the molar volume of a gas at STP and the molar mass of ammonia.

Explanation:

To compute the weight of 6.00L of ammonia gas, we need to know that one mole of any gas at Standard Temperature and Pressure (STP) occupies a volume of 22.4L. The molar mass of ammonia (NH3) is 17.03g/mole. First, compute the number of moles of ammonia: 6.00L * (1 mol/22.4L) = 0.27 mol. The weight of the ammonia is then: 0.27 mol * 17.03 g/mol = 4.59 g.

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