Question

Calculate the mass of 0.25 mol of magnesium atom

Answer 1

Answer:

6g

Explanation:

$no \: of \: moles = \frac{given \: mass}{molar \: mass}$

=>0.25= Mass/24

=>Mass=24×0.25

=>Mass=24×1/4

=>Mass=6g

Hence, it's mass is 6g.

Answer 2

Answer:

In one molecule of magnesium phosphate, 8 oxygen atoms are present.

Thus, 1 mole of magnesium phosphate will contain 8 moles of oxygen.

Hence, 0.25 moles of oxygen atoms are present in

8

1

×0.25=3.125×10

−2

moles of magnesium phosphate.