Question

Determine the mass in grams of 125 mol of neon

Answer 1

multiply the number of moles by the molar mass (which is 20.1797)
so:
125*20.1797=2522.4625 grams

Answer 2

2.52 ×10³ grams

Step-by-step explanation:

First we need to know the molar mass of Neon which correesponds to the value of its atomic weight and is 20.180 grams/mol

To calculate the mass of 125 moles of Neon we must hence multiply the mass of one mol by the number of moles:

125 moles x 20.180 g/mol = 2522.5 grams

To write the result with the correct number of significant figures (three) you can write the result in scientific notation: 2.52 ×10³ grams