# How Many Grams of Magnesium Will Have the Same Number of Atoms as 6 Grams of Carbon ? (Mg = 24 U ; C = 12 U ) - Science

Short Note

How many grams of magnesium will have the same number of atoms as 6 grams of carbon ?
(Mg = 24 u ; C = 12 u )

#### Solution

Mass of carbon = 6g

We know that equal moles of all substances contain equal number of atoms (1 mole of all substances contains 6.022 × 1023 atoms).

The first step will be to convert 6g  carbon into moles.

1 mole of carbon = 12g

12g  carbon = 1 mole

Therefore, 6g carbon = 0.5 moles

Since, equal moles of all substances contain equal number of atoms, 0.5 moles of carbon will have the same number of atoms as present in 0.5 moles of magnesium.

The next step will be to find out the mass of 0.5 moles of magnesium in grams.

1 mole of magnesium = 24g

0.5 moles of magnesium = 24 × 0.5 = 12g

Hence, 12g magnesium will contain the same number of atoms as present in 6g  carbon.

Concept: Atoms and Molecules Numericals
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#### APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Hots Questions | Q 49 | Page 174