☰ Contents · Chemistry (General chemistry)

Amount of substance. The mole and molar mass

Lessons 5 · 1 lessons · S. Masharipov, A. Mutalibov, E. Murodov, H. Islomova. General chemistry, Grade 11, 1st edition. G‘afur G‘ulom Publishing and Printing House, Tashkent, 2018
Answers are for parents and teachers.
1
How many moles are there in 5.6 g of iron (M = 56 g/mol)?
2
Find the mass of 4 mol of CO₂ (M = 44 g/mol).
3
Calculate the molar mass of Al₂(SO₄)₃ (Aᵣ: Al 27, S 32, O 16).
4
Find the mass fraction (%) of calcium in CaCO₃ (M = 100 g/mol).
5
Write the number of molecules in 2 mol of water.