Question

How many water molecules are in a block of ice containing 1.25 mol of water (h2o)?

Answer 1

$\huge\bold\red{\underline{\underline{\sf{Given:}}}}$

Number of moles of H2O = 1.25 Mol

$</p><p>\huge\bold\red{\underlie{\underline{\sf{Solution:}}}}$

Number of molecules = Number of moles × Avagadros number

= 1.25 × 6.022 × 10²³

$\huge\bold{\boxed{\boxed{7.5275 \:× \:10^{23} \:molecules}}}$

Answer 2

$7.53\times 10^{23}$  water molecules are in a block of ice containing 1.25 mol of water

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

Given moles: 1.25

1 mole of water $(H_2O)$ contains=$6.022\times 10^{23}$

molecules of water

1.25 moles of water $(H_2O)$  contains=$\frac{6.022\times 10^{23}}{1}\times 1.25=7.53\times 10^{23}$  molecules of water

Learn more on Avogadros law:

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