Question

How many atoms of H is in 300g H2O

Answer 1

To find the number of atoms of hydrogen in 300g of H2O, we can calculate the number of moles of H2O and then multiply it by the ratio of hydrogen atoms to H2O molecules.

Step-by-step explanation:

In order to determine the number of atoms of hydrogen in 300g of H2O, we can first find the number of moles of H2O using its molar mass. The molar mass of H2O is 18.015 g/mol. So, 300g of H2O is equal to 300/18.015 = 16.65 moles of H2O.

Since there are two hydrogen atoms in one molecule of H2O, the number of moles of hydrogen can be calculated by multiplying the number of moles of H2O by the ratio of hydrogen atoms to H2O molecules, which is 2/1.

Therefore, there are 16.65 x 2 = 33.3 atoms of hydrogen in 300g of H2O.

Answer 2

`1.003*10^(25)`

Step-by-step explanation:

We'll be using Avogadro's number which defines the amount of atoms in a mole.
To find the mole amount, we use the atomic mass to find the molar mass because the atomic mass represents how many grams are in a single mole of any element

2 Hydrogen atoms have an atomic mass of 2.016 g

1 Oxygen atom has an atomic mass of 15.999 g

Adding these two numbers gives us H2O's molar mass, which is 18.015 g/mol (grams per mole).

Now we take the supplied mass of 300g and divide it by the mm (molar mass) to find the amount of moles we have. 300/18.015 = 16.653

We have 16.653 moles in 300g of H2O.

Now we have to multiply 16.653 by Avogadro's number,
`6.022 * 10^(23)`

This gives us:
`1.003*10^(25)`