The mole is derived from the quantity of atoms in 12 grams of carbon-12. The mole is just a number, it can be used for:
D All of the above
Calculate the molecular mass of calcium chloride (CaCl 2 ).
A 35.45 g/mol
B 110.98 g/mol
C 40.08 g/mol
D 75.53 g/mol
Molar mass, sometimes referred to as molecular weight, is the mass of one mole of a substance, and is usually expressed in
D? NO !
Ca = 40 grams/ mol
Cl = 35.5 /mol times 2 = 71
40 + 71 = 111 yes B
So I did a lab determining the chemical formula of a hydrate. I really just need somebody to check this over for me. We had to find the molecular formula of a hydrate of copper (2) sulphate, CuSO4 .xH2O. My observation table looks like this: Mass of clean,
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