Asample of calcium carbonate (caco3) is known to contain some impurities. it is found that calcium makes up 11% of the entire mass of the sample. all of the calcium comes from the caco3 compound. find the mass percent of caco3 in the sample. set up a ratio and solve.

28.05% is the mass percent of calcium carbonate in the sample.

Explanation:

Suppose in 100 g of sample of impure calcium carbonate

Percentage of calcium in the sample = 11%

Mass of the calcium in the sample = 11% of 100 g =

Moles of calcium =

In 1 mole of calcium carbonate there are 1 mol of calcium .Then in 0.275 moles of calcium will be in :

calcium carbonate

Mass of 0.275 moles of calcium carbonate :

0.275 mol × 102 g/mol =28.05 g

Percentage of calcium carbonate in the sample:

28.05% is the mass percent of calcium carbonate in the sample.

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.