Question

How many molecules are the in 1.8g of water molecules

Answer 1

6.022 x
`10^(22)` molecules

Step-by-step explanation:

One mole of any substance has 6.022x
`10^(23)` particles.

Mr of water: 16 + 2 = 18 g

moles of water given: 1.8/18 = 0.1 moles

Using ratio:

moles : molecules

1 : 6.022x
`10^(23)`

0.1 : X

X = 0.1 x (6.022x
`10^(23)` )

X = 6.022 x
`10^(22)`