Question

calculate the number of moles of magnesium present in magnesium ribbon weighing 12gm ​

Answer 1

Answer:

Mass of magnesium ribbon- (Mg),w= 12g

Molar mass of Mg (M)= 24g

No. of moles (n)= w/m= 12g/24g mol

= 0.5 mol

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Answer 2

To find:-

☆Number of moles of magnesium present in magnesium ribbon weighing 12g.

Solution:-

•Given mass of Magnesium(Mg)=12g

•Atomic mass of Magnesium=24u

•Thus,molar mass of Magnesium=24g

We know that:-

Number of moles=Given mass/Molar mass

=>12/24

=>1/2

=>0.5 mole

Thus,0.5mole of magnesium is present in magnesium ribbon weighing 12g.