A sample of calcium phosphate was found to have a mass of 125.3 g. How many molecules were contained in the sample?

The answer for the following problem is mentioned below.

Explanation:

Given:

mass of calcium phosphate ( ) = 125.3 grams

We know;

molar mass of calcium phosphate  ( ) = (40×3) + 3 (31 +(4×16))

molar mass of calcium phosphate  ( ) = 120 + 3(95)

molar mass of calcium phosphate  ( )  = 120 +285 = 405 grams

We also know;

No of molecules at STP conditions() = 6.023 × 10^23 molecules

To solve:

no of molecules present in the sample(N)

We know;

N÷

=

N =(405×6.023 × 10^23) ÷ 125.3

N = 19.3 × 10^23 molecules

Therefore number of molecules(N) present in the calcium phosphate sample are  19.3 × 10^23 molecules

particle   p is an electron and particle q is a neutron

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.