Question

Which one has a greater number of carbon atoms?

50 g of CaCO3 or 50g of Na2CO3​

Answer 1

Answer:

I am thinking the answer is second one 50g of Na2CO3

Answer 2

Answer:

50 g of CaCO3 has more carbon atoms

Explanation:

Molecular mass of CaCO3 is 100 u

Therefore, molar mass of CaCO3 is 100 g

Molecular mass of Na2CO3 is 106 u

Therefore, molar mass of Na2CO3 is 106 g

Therefore,  50 g CaCO3 and 53 g of Na2CO3 have the same number of calcium carbonate and sodium carbonate molecules, which is half of Avogadro constant, 3.011 * 10 to the power 23. So, they also contain the same number of carbon atoms.

When sodium carbonate is reduced to 50 g, the number of Na2CO3 molecules get diminished and so do the carbon atoms

Thus, 50 g of CaCO3 has more carbon atoms than 50 g of Na2CO3.

Hope you like my answer :D