Answer:
3.0 M
Explanation:
The molarity formula is M = n/v
where M is the molarity, n is the number of moles, and v is the volume in litres.
step 1: convert the grams of KNo3 to moles. To convert grams to moles, divide by the molar mass.
(30 g divided by 101.103 g/mol) = 0.296 moles
step 2: convert the volumes to Litres. 100 mL is 0.1 L
step 3: apply the formula. Molarity = (0.296 mol / 0.1 L) = 2.96 mol/L
We will round our answer to 3.0 M
