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Mole Concept

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Question

Calculate the number of moles of magnesium present in a magnesium ribbon weighing $12 g$ . (GAM of magnesium is $24 g$ ).

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Solution

$Gram atomic mass of magnesium$ = $24 g$
$Number of moles$ = $\frac{Given mass}{Gram atomic mass}$
$Number of moles of Mg$ $= \frac{12 g}{24 g} = 0.5$

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Q. A student wants to have 3.011 × 10²³ atoms each of magnesium and carbon elements. For this purpose, he will have to weigh :
(a) 24 g of magnesium and 6 g of carbon
(b) 12 g of carbon and 24 g of magnesium
(c) 20 g of magnesium and 10 g of carbon
(d) 12 g of magnesium and 6 g of carbon

Q. Calculate the number of gram atomic mass of magnesium present in a magnesium ribbon weighing

12 g

. Gram atomic mass of magnesium is

24 g

.

Q. The number of moles of magnesium present in a magnesium ribbon weighing

12 g

(molar atomic mass of magnesium is

24

Q. Question 23
Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is

24 g m o l^{- 1}

.

Calculate the number of moles of magnesium present in a magnesium ribbon weighing $12 g$ . The molar atomic mass of magnesium is $24 g {mol}^{- 1}$ .

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