Question

If 0.2 mol of the sodium chloride (NaCl) substances are required how many grams of sodium chloride should be taken?

Answer 1

Answer:

20.02 gram

For finding Substance weight in gram, we know the formula.

Weight if substance (in gm) = Number of moles × Molar Mass.

Now, we have to find for three substance.

(i) For NaCl , Sodium chloride -

Number of moles × molar mass.

= (0.2 × 58.44)

= 11.69 g.

(ii) For MgO, Magnesium Oxide -

Number of moles × Molar mass.

= ( 0.2 × 40.3)

= 8.06 g

(iii) For CaCO₃ , Calcium carbonate -

Number of moles × Molar Mass.

= (0.2 × 100.087)

= 20.02 g

Explanation:

For finding Substance weight in gram, we know the formula.

Weight if substance (in gm) = Number of moles × Molar Mass.

Now, we have to find for three substance.

(i) For NaCl , Sodium chloride -

Number of moles × molar mass.

= (0.2 × 58.44)

= 11.69 g.

(ii) For MgO, Magnesium Oxide -

Number of moles × Molar mass.

= ( 0.2 × 40.3)

= 8.06 g

(iii) For CaCO₃ , Calcium carbonate -

Number of moles × Molar Mass.

= (0.2 × 100.087)

= 20.02 g