Question

Calculate the number of moles present in 646g of ammonia

Answer 1

Answer:

38 moles

Explanation:

NH3

molecular weight = 14+3×1=17

number of moles = gram weight÷molecular weight

= 646÷17

= 38 mol.

Answer 2

Given - Mass of ammonia: 646 gram

Find - Number of moles present in 646 gram of ammonia.

Solution - Number of moles present in 646 gram of ammonia can be calculated by the formula: mass/molar mass of ammonia.

Molar mass of ammonia is 17 gram/mol

Keeping the values in formula

Number of moles = 646/17

Number of moles = 38

Hence, 38 moles are present in 646g of ammonia