Some Basic Concepts Of Chemistry Question 31

Question: If 3.01×1020 molecules are removed from 98 mg of H2SO4 then the number of moles of H2SO4 left are

Options:

A) 0.1×103

B) 0.5×103

C) 1.66×103

D) 9.95×102

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Moles of H2SO4 in 98 mg of H2SO4 =198×0.098=0.001 Moles of H2SO4 removes =3.01×10206.02×1023=0.5×103=0.0005 Moles of H2SO4 left =0.0010.0005=0.5×103



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