Question

calculate the mass of 0.5 moles of H2SO4

Answer 1

molar mass of H2SO4 is 98g.
moles given 0.5
mole =given mass / molar mass
given mass or mass present =0.5 × 98 = 49g.

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Answer 2

The mass of 0.5 moles of $H_2SO_4$ is 49 u.

Explanation:

It is required to find the mass of 0.5 moles of $H_2SO_4$. The molecular mass of $H_2SO_4$ is :

$M=2\times 1+32+16\times 4=98\ u$

The number of moles is given by the following formula as :

$n=\dfrac{m}{M}$

m is the mass

n is number of moles

$m=n\times M\\\\m=0.5\times 98\\\\m=49\ u$

Therefore, the mass of 0.5 moles of $H_2SO_4$ is 49 u.

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Mole concept

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