Correct Answer: Option C

Explanation

300cm³ of 0.4moldm³

1000cm³ contains 0.4mole

300cm³ will contain \(\frac{300 \times 0.4}{1000}\)

= 0.12mole

Number of moles = \(\frac{Mass}{\text {Molecular mass}}\)

Mass = number of moles x m.mass

= 0.12 x 56 = 6.72g

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