Question

Which one of the following represents 180 g of water?

पर्याय

• 5 Moles of water

• 90 moles of water

• `(6.022 xx 10^23)/180` molecules of water

• 6.022 × 10²⁴ molecules of water

Answer 1

6.022 × 10²⁴ molecules of water

Explanation:

No. of moles of water present in 180 g

= `"Mass of water"/"Molar mass of water"`

= `(180  "g")/(18  "g mol"^-1)`

= 10 moles

One mole of water contains = 6.022 × 10²³ water molecules

10 mole of water contains = 6.022 × 10²³ × 10

= 6.022 × 10²⁴ water molecules