Question

calculate the weight in grams present in 0.7 moles of sodium​

Answer 1

Answer:

0.1 mole of has 20.8 gm of oxygen.

Explanation:

The molar mass of 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,

13 × 16 gm = 208 gm

Now to calculate mass of oxygen in 0.1 mole of ,

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

0.1 × 208 = 20.8 gm of oxygen

Answer 2

Answer:

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.