Crunch the mole numbers

Exercise and reference answers

Questions

1. Answer

   58.44

   Question

   NaCl formula mass: Na 22.99 amu + Cl 35.45 amu = ? amu

2. Answer

   106.35

   Question

   Three Cl atoms at 35.45 amu each add up to ? amu

3. Answer

   18

   Question

   One mole of water weighs about ? g

4. Answer

   0.12

   Question

   Moles in 4.7 g of potassium at 39.10 g/mol, to 2 decimals

Instructions

Work each one out and type the number on the pad.

Explanation