Question

the total number of protons in 10 gram of calcium carbonate is

Answer 1

3.01⋅1024 protons.

Explanation:

Well, calcium carbonate, or limestone, has a chemical formula of CaCO3. It has a molar mass of around 100 g/mol.

So, in 10 g of calcium carbonate, there will be

10g100g/mol=0.1 mol

So, there will be 0.1 moles of calcium carbonate in this sample.

One mole of molecules is defined by 6.02⋅1023molecules.

Therefore, there exist 6.02⋅1023⋅0.1=6.02⋅1022 molecules of calcium carbonate.

CaCO3 consists of one calcium atom, one carbon atom, and three oxygen atoms.

A calcium atom has 20 protons, a carbon atom has 6 protons, and one oxygen atom has 8protons, and so three oxygen atoms would have 8⋅3=24 protons.

In total, one molecule of calcium carbonate has 20+6+24=50 protons. But, we have 6.02⋅1022 molecules of calcium carbonate.

Therefore, in total, we would have

6.02⋅1022⋅50=3.01⋅1024 protons

Answer 2

In total, one molecule of calcium carbonate has 20+6+24=50 protons. But, we have 6.02⋅1022 molecules of calcium carbonate.