Question

1. What is the mass in grams of 2.25 mol of the element iron, Fe?

2. What is the mass in grams of 0.375 mol of the element potassium, K?
3. What is the mass in grams of 0.0135 mol of the element sodium, Na?
4. What is the mass in grams of 16.3 mol of the element nickel, Ni?

Answer 1

1. 125.65

2. 14.66

3. 0.31

4. 9.57 x 10^2

Step-by-step explanation:

1. Fe: 1 mole = 55.845 g

=> 2.25 x 55.845 = 125.65125 or 125.65

2. K: 1 mole = 39.098 g

=> 0.375 x 39.098 = 14.66175 g or 14.66 g

3. Na: 1 mole = 22.990 g

=> 0.0135 x 22.990 = 0.310365g or 0.31

4. Ni: 1 mole = 58.693 g

=> 16.3 x 58.693 = 956.6959g or 9.57 x 10^2 g