Question

Calculate the mass of oxygen in grams present in 0.1 mole of sodium carbonate decahydrate(na2co3.10h2o)

Answer 1

Here's the answer to your question.

Answer 2

0.1 mole of $Na_{2}CO_{3} 10 H_{2}O$ has 20.8 gm of oxygen.

Explanation:

The molar mass of $Na_{2}CO_{3} 10 H_{2}O$ is 286 gm.

One mole of sodium carbonate decahydrate contains 13 atoms of oxygen.

1 atom of oxygen weights 16 gm.

So, Number of oxygen in 1 mole of sodium carbonate decahydrate is calculated as follows,

$\Rightarrow$ 13 × 16 gm = 208 gm

Now to calculate mass of oxygen in 0.1 mole of $Na_{2}CO_{3} 10 H_{2}O$,

We can simply use the calculation and we can get the amount of oxygen.

$\Rightarrow$ 0.1 × 208 = 20.8 gm of oxygen