Question

Calculate the number of gram molecules of water in a beaker containing 576 gram of water. ​

Answer 1

Answer:

Explanation:

1 gram molecule of water contains 18g.

576 grams contain 576/18 gram molecules of water.

=32.....

Answer 2

The number of gram molecules of water in a beaker containing 576 gram of water is $192.7\times 10^{23}$

Explanation:

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

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar Mass}}=\frac{576g}{18g/mol}=32moles$

1 mole of water $(H_2O)$ contains  = $6.023\times 10^{23}$ gram molecules

32 moles of water $(H_2O)$ contain  = $\frac{6.023\times 10^{23}}{1}\times 32=192.7\times 10^{23}$ gram molecules

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