Question

evaluate the basic difference between the formula unit mass and the molecular mass..write the formula of calcium chloride, potassium nitrate and magnesium hydroxide and compute their molecular masses.
Please do fastly....

Answer 1

The key difference between formula mass and molar mass is that, the formula mass of a mole or a compound is the sum of the atomic weights of the atomic in it's empirical formula whereas molar mass is the mass in grams of one mole of a substance.

Answer 2

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$<b>Hope it helps:-$

The difference between Molecular Mass and Formula Unit Mass is that "Molecular Mass" term is used for covalent compounds and "Formula Unit Mass" term is used for ionic compounds.

HNO3 is a covalent compound in its purest form but when we add water in it, HNO3 slipts into H+ and NO3 - ions and further H+ ions attaches itself to H2O to give H30 which is an hydronium ion which is ionic and CaCl2 is an ionic compound.

* Formulas:-

1) Calcium chloride:- CaCl2 its molecular mass is Molar mass of CaCl2 = 110.984 g/mol.

2) Potassium nitrate:-KNO3 its molecular mass= = 101.1032 g/mol.

3) Magnesium hydroxide:- Mg(OH)2 its molecular mass = 58.3197 g/mol.

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