Q1. Calculate the number of moles of each substance in samples with the following masses:

a) 2.4 g of He

b) 250 mg of Carbon

c) 15 g of sodium Chloride

d) 40 g of Sulphur

Q2. Calculate the mass in grams of each of the following samples:

a) 1.2 moles of K

b) 75 moles of H2

c) o. 25 moles of steam

d) 0.15 mole of Cuso4

Question

Alvaro Valenzuela

Chemistry

18 July, 09:51

Q1. Calculate the number of moles of each substance in samples with the following masses:

a) 2.4 g of He

b) 250 mg of Carbon

c) 15 g of sodium Chloride

d) 40 g of Sulphur

Q2. Calculate the mass in grams of each of the following samples:

a) 1.2 moles of K

b) 75 moles of H2

c) o. 25 moles of steam

d) 0.15 mole of Cuso4

+5

Answers (1)

Know the Answer?

Adrian Mccall · Answer 1

1) a) 2.4/4=0.6

b) 250x10^ (-3) / 12=1/48g

c) 15/58.5=10/39

d) 40/256.8=50/321g

a) 1.2x39.1=46.92g

b) 75x2=150g

c) 0.25x18=4.5

d) 0.15x159.6=23.94g