Question

How many moles of SO2 have same mass as 3 moles of oxygen?

Answer 1

Given:

Two chemicals = $SO_2$ and O

Number of moles of oxygen = 3

To find:

Number of moles of $SO_2$ in 3 moles of Oxygen

Calculation:

Step 1:

Calculation of the molar mass of given chemicals

Molar mass of $SO_2$ = 1(S) + 2(O) = 1 (32) + 2 (16) = 32+32 = 64g.

Molar mass of Oxygen = 16g

Step 2:

Calculation of 1 moles of the given substance

1 mole of substance = Molar mass of the substance.

∴ 1 mole of $SO_2$ = 64g

3 mole of oxygen = 16×3 = 48g

Step 3:

Calculation of number of moles of $SO_2$ with same mass of 3 moles of oxygen

64 g of $SO_2$  = 1 mole

∴ 48 g of $SO_2$ = x

On cross multiplication:

x × 64 = 1 × 48

x = $\frac{1\times48}{64}$

x = $\frac{48}{64}$

x = 0.75 moles

Conclusion:

0.75 moles of $SO_2$  have same mass as 3 moles of oxygen.

Learn more about such concept

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Verify the following:

a) 5 moles of carbon dioxide and 5 moles of water do not have same mass.

b) 240g of calcium and 240g of magnesium elements have a mole ratio 3:5

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Answer 2

0.7 moles of of SO2 have same mass as 3 moles of oxygen

to understand it details look at the picture below