The number of water molecules in a drop of water weighing 5mg is

# The number of water molecules in a drop of water weighing 5mg is

1. A

6.023 × 1022

2. B

3.0125 × 1021

3. C

1.67 × 1020

4. D

1.67 × 1021

Fill Out the Form for Expert Academic Guidance!l

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)

### Solution:

Weight of drop of water = 5mg = 5$×$10-3 g

18g of H2O contain -----------------------6.023$×$1023 molecules

5$×$10-3 g  of H2O contain 'X' molecules

X = $\frac{5×{10}^{-3}×6.023×{10}^{23}}{18}$

X = 1.67$×$1020

## Related content

 What’s the full form of ssup in chat on Instagram What’s the full form of ssup How to Write an Acknowledgement for a College Project? How to write acknowledgement for projects Is the Asia Cup in Qatar 2023? What is the prize money for Asia Cup 2023? Why is Noida Sector 62 famous? Is Rajju Bhaiya University Recognized by The University Grants Commission? Golden Opportunity with Sri Chaitanya’s Score Scholarship Exam 2023 100 Paryayvachi Shabd (पर्यायवाची शब्द) – Paryayvachi Shabd in Hindi (Synonyms)

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)