Question

If the atomic masses of phosphorous, hydrogen and oxygen are 21 , 3 and m, then molecular mass of phosphorous acid is : ​

Answer 1

Answer:

ho213m

this is the ans

Answer 2

Answer:

mention it as bran list answer

Explanation:

In a reaction 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Show that these observations are in agreement with the law of conservation of mass carbonate.

Ans.

Sodium carbonate + Ethanoic acid → Sodium ethanoate + Carbon dioxide + Water

5.3 g + 6 g → 8.2 g + 2.2 g + 0.9 g

LHS RHS

11.3 g = 11.3 g

(Mass of reactant) (Mass of product)

This shows, that during a chemical reaction