Question

Calculate the molecularmass of NaNO3, Na2CO3 and CaCl2.

Answer 1

Explanation:

1. Molecular mass of NaNO3 - 23+14+48=85
2. Na2CO3- 46+12+48=96
3. Cacl2-40+71=121

Answer 2

The molecular mass of $NaNO_3$ ,  $Na_2CO_3$ and $CaCl_2$ are 85g, 106g and 111g respectively

Explanation:

Molecular mass is defined as the mass in grams of 1 mole of a substance.

S.I Unit of Molecular mass is gram per mole and it is represented as g/mol.

1. $NaNO_3$

Atomic Mass of sodium (Na) = 23 g

Atomic Mass of nitrogen (N) = 14 g

Atomic Mass of oxygen (O) = 16 g

Molecular mass of $NaNO_3$= 23 +14 +16(3) = 85 g/mol

2. $Na_2CO_3$

Atomic Mass of sodium (Na) = 23 g

Atomic Mass of carbon (C) = 12 g

Atomic Mass of oxygen (O) = 16 g

Molecular mass of $Na_2CO_3$= 23(2) +12 +16(3) = 106 g/mol

3. $CaCl_2$

Atomic Mass of calcium (Ca) = 40 g

Atomic Mass of chlorine (Cl) = 35.5  g

Molecular mass of $CaCl_2$= 40(1) + 35.5 (2) = 111 g/mol

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