Answer:
11.2 moles of KNO3 will be required to prepare 8.0 L of 1.40 M KNO3
Explanation:
To answer this question, we need an understanding of the units of the term called molarity.
1.40M KNO3 means that there are 1.4 moles per dm^3 or per liter of the solution.
Now, since there are 1.4 moles in 1 liter
x moles will be present in 8.0 liters
Thus, mathematically;
x * 1 = 8 * 1.4
x = 11.2 moles
