Question

calculate the mass of 0.125 mol NAOH

Answer 1

$\large{\blue{\Answer}}}$

First the molar mass of NaOh

=23+16+1=40amu

The mass of Naoh

moles = mass /molar mass

0.125mol=mass /40amu

0.125mol X 40amu = mass

$\large{\implies{\green{5gram}}}$

Answer 2

The mass of 0.125 mol NaOH is 5 grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

1 mole of sodium hydroxide $(NaOH)$ weighs = 40 g/mol

0.125 moles of sodium hydroxide $(NaOH)$ weigh= $\frac{40}{1}\times 0.125=5g/mol$

Thus the mass of 0.125 mol NaOH is 5 grams

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