Question

Identify the elements A and B having atomic number 11 and 8

Write the chemical formula of combination of A and B, according to their valencies.

Calculate the formula unit mass of the compound. What is the mass of 1 and 2

moles of the compound? How many no. of molecules are present in 1 and 0.5 mole

of the compound?​

Answer 1

Answer:

11 - sodium

8 - oxygen

formula - Na2O

mass- (23)2 + 16

=> 62

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Answer 2

A) 11- sodium
B) 8- oxygen

Na- 1+
O- 2-
Therefore formula= Na2O

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