Mass of 2 mol of NH3 is 34 grams.
The number of moles of a substance is equal to the ratio of its given mass in a chemical reaction to the mass of one mole of that substance. One mole of any substance will be equals Avogadro's number, that is, 6.023 × 1023. It is also used to express concentration units such as mole per litre or molecular weight.
Mass which is symbolized as m, it is a dimensionless quantity that is representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram.
To calculate the mass of NH3 we use the below formula;
number of moles = <u>weight of the substance </u>
Molecular weight
weight = number of moles × Molecular weight
weight = 2 × 17 ⇒ 34 grams
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