Question

Calculate number of moles and the number of molecular in 500mg carbon dioxide

Answer 1

CO2 consists of 2 elements of C and O.
Atomic mass of C = 12 amu
and atomic mass of O = 16 amu

Molecular mass of CO2 = 12 +2(16) = 12 + 32 = 44 amu.

That means 1mole of CO2 would weight 44g.
44000 mg = 1 mole
1mg = 1/44000 mole of CO2
500 mg = (1/44000)(500) moles

500 mg of CO2 = 1/88 moles.

The no. of molecules in that 500mg = (1/88)(6.022×10^23)
= 0.0684 × 10^23

Hence, 55mg of CO2 would have 6.84 × 10^21 molecules.

Answer 2

Answer:

55mg of CO2 would have 6.84 × 10^21 molecules.

Explanation:

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