Question

The number of oxygen atoms present in 14.6 g of
magnesium bicarbonate is:
a. 6N
6.0.6 NA
c. NA
d.
2​

Answer 1

Answer:

b. 0.6 na

yeah

bcoz the number of oxygen atoms present in 14.6 g of magnesium bicarbonate is 0.6 NA.

Answer 2

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molecular mass of magnesium bicarbonate = 146

no. of moles = given weight/moecular weight

= 14.6/146 =0.1 …...............(1)

here, no. of moles of oxygen in magnesium bicarbonate = 16*3*2/16 = 6 …..............(2)

[from (1) and (2) ],

0.1*6*NA =0.6 NA

So, the number of oxygen atoms present in 14.6 g of magnesium bicarbonate is 0.6 NA