Question

1) Calculate the number of moles of C in 18g of carbon.
2) Calculate the mass of a silver atom (GAM of Ag=108g).
3) Determine the number of atoms in 1.792×10^{-6} g of silver.
4) Calculate the mass of 0.5 moles of CO2.
5) Calculate the number of molecules present in 1 g of water.
6) Calculate the mass of 0.4 moles of oxygen molecule.
7) Calculate:
a) Molecular mass of benzene (C6H6).
b) The mass of one molecule of benzene.
8) How many moles of copper are contained in 755g of metal (
GAM of Cu = 63.54g).
9) How many atoms of Mg are present in 0.35 mole of Mg.
10) Calculate the number of moles and number of molecules 8.516g of ammonia.

Answer 1

Answer:

Explanation:

The simplified answer is 0.60 moles of carbon in 18 g of glucose.

As 1 mole = 6.023 x 10^23 molecules (Avogadro's number), 108 g of Silver contains 6.023 x 10^23 molecules. So, mass of 1 atom of silver = 108 / 6.023 x 10^23 = 1.7931 x 10^-22 g. Therefore the answer is =107.9 g/mol. =>10×12 + 8×1=120+8= 128 g.