1 mole of carbon dioxide does indeed weigh 44g.
Relative atomic mass (RAM) carbon (C) = 12g per mole
Relative atomic mass (RAM) oxygen (O) = 16g per mole
Relative Molecular Mass of CO2 = 12 + (2 x 16 = 32) = 44g per mole.
Avogadro's number is the number of particles in 1 mole of a substance. It equals 6.02 x 10^23. In other words 6 followed by 23 zeros.
So 44g of carbon dioxide contains 6.02 x 10^23 molecules of the gas, and not 6! Otherwise they're very heavy atoms!
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