6. convert 15.8 moles of calcium to grams.

Answer

Explanation:

Step1: Recall the formula

The formula to convert moles to grams is (m = n\times M), where (m) is mass in grams, (n) is the number of moles, and (M) is the molar mass. The molar mass of calcium ((Ca)) is (M = 40.08\space g/mol).

Step2: Substitute the values

Given (n = 15.8\space mol) and (M=40.08\space g/mol), substitute into the formula: (m=15.8\times40.08).

Step3: Calculate the result

(15.8\times40.08=(16 - 0.2)\times40.08=16\times40.08-0.2\times40.08) (16\times40.08 = 641.28), (0.2\times40.08 = 8.016) (m=641.28- 8.016=633.264\space g)

Answer:

(633.264\space g)