Question

If the number of molecules present in 9 grams of water is n, what is the number of molecules in 44 grams of co2?



please give step by step answer​

Answer 1

Answer:

Question - If the number of molecules present in 9 grams of water is n, what is the number of molecules in 44 grams of co2????

How many molecules are present in 9g of water?

1 mole of water weighs 18 g

Therefore 0.5 mole of water weighs 9 g

According to Avagadro,

1 mol = 6.023×10^23

atoms

So,

0.5 mol = 3.0115 ×10^23

molecules of water

Each water molecule contains 2 hydrogen atoms .

Therefore

2× 3.00115×10^23

atoms of hydrogen are present in 9g of water

Answer:

6.02⋅1023

So, you know that your sample of glass contains

9 g

of water.

Use water's molar mass to find how many moles of water you get in your glass sample.

9g⋅1 mole water18.02g=0.4994 moles water

A water molecule,

H2O

, contains one oxygen atom and twp hydrogen atoms. This means that every mole of water, you have

one mole of oxygen

two moles of hydrogen

This means that the number of moles of hydrogen you have in that many moles of water will be

0.4994moles water⋅2 moles H1mole water≈1.00 moles H

Now, one mole of any element contains exactly

6.022⋅1023

atoms of that element - this is known as Avogadro's number.

Hope it may be help you

please mark me as a brainlest