How many water molecules are there in a drop of volume 0.05 mL? (Density of water is 1 g/mL)

1.67 \times 10^{21}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

1.67 \times 10^{22}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.67 \times 10^{23}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.67 \times 10^{24}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $1.67 \times 10^{21}$
mass of 1 drop $= 0.05 \times 1 g = 0.05 g$
No. of water molecules = moles $\times 6.02 \times 10^{23}$
= $\frac{0.05}{18} \times 6.02 \times 10^{23}$
= $1.67 \times 10^{21}$

Suggest Corrections

Similar questions

1.0 g / m l

0.05 m l ?

0.05 mL

1.0 g/mL

0.0018

0.05 mL

1.0 g/mL

\frac{2.43 \times 2.43 - 2 \times 2.43 \times 1.67 + 1.67 \times 1.67}{2.43 - 1.67}

Join BYJU'S Learning Program