In a chemical reaction, exactly 2 mol of substance A react toproduce exactly 3 mol of substance B.
2A = 3B
How many molecules of substance Bare produced when 28.2 g of substance A reacts? The molar mass ofsubstance A is 17.9 g/mol.
Step 1. Convert the mass of A tomoles.
__________________________________molA
Step 2. Convert the number ofmoles of A to the number of moles of B.
___________________________________molB
Step 3. Convert the number ofmoles of B to molecules of B.
___________________________________molecules ofB.
