Question

If 0.2 mol of the following substances are required how many grams of those substances should be taken?
Sodium chloride, magnesium oxide,calcium carbonate

Answer 1

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



Hope it Helps.

Answer 2

Answer:

for sodium chloride

no of miles ×molar mass

=(0.2×58.44)

=11.699

Explanation:

we have to write first sodium moles and then multiply with molar mass you will get the answer as 11.699