Question

Calculate the number of moles of Ca, C and oxygen atoms and its mass in 200 g of CaCO3.​

Answer 1

Answer:

Ca--> 40u, C-->12, O-->16. Hence molecular mass of CaCO3= 40+12+{3×(16)}=100u~~ 100g. Of moles(n) = given mass ÷( molecular mass). n=200÷100= 2 mols.

Explanation:

hope it helps you

Answer 2

Answer:

1 molecule of CaCO3 has 1 atom of calcium, 1 atom of carbon and 3 atoms of oxygen

Explanation:

The molar mass of CaCO3 =100g

so 200 g of CaCO3=2 moles

hence 2 moles of CaCO3 will have 2 moles of Ca atoms, and 3x2 =6 moles of oxygen atoms

this is according to what we have in Calcium Carbonate formula

1 molecule of CaCO3 has 1 atom of calcium, 1 atom of carbon and 3 atoms of oxygen