a 100 g sample is composed of 36 g of calcium (ca) and 64 g of chlorine (cl). what is the percent by mass of…

Explanation:

Step1: Recall mass - percent formula

Percent by mass of an element=$\frac{\text{Mass of element}}{\text{Mass of sample}}\times100%$

Step2: Substitute values

Given mass of Ca = 36 g and mass of sample = 100 g. So, percent by mass of Ca=$\frac{36}{100}\times100%$

Step3: Calculate result

$\frac{36}{100}\times100% = 36%$

Answer:

36%