If 1 , mL of water contains 20 drops,then the | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Density of water is $1 \, g/mL$. Therefore,$1 \, mL$ of water has a mass of $1 \, g$. Molar mass of water $(H_2O)$ is $18 \, g/mol$. Number of mol

Vedclass · Accepted Answer

$1.673 	imes 10^{21}$ molecules

Vedclass · Answer

(D) Density of water is $1 \, g/mL$. Therefore,$1 \, mL$ of water has a mass of $1 \, g$. Molar mass of water $(H_2O)$ is $18 \, g/mol$. Number of moles in $1 \, mL$ of water = $\frac{1 \, g}{18 \, g/mol} = 0.0556 \, mol$. Number of molecules in $1 \, mL$ of water = $0.0556 	imes 6.022 	imes 10^{23} \approx 3.346 	imes 10^{22}$ molecules. Since $1 \, mL$ contains $20$ drops,the number of molecules in $1$ drop = $\frac{3.346 	imes 10^{22}}{20} = 1.673 	imes 10^{21}$ molecules.

If $1 \, mL$ of water contains $20$ drops,then the number of molecules in $1$ drop of water is:

Similar Questions

Calculate the mass in $kg$ of $2.5 \ mol$ of ammonia.

Which of the following has the maximum number of molecules?

How much time would it take to distribute one Avogadro number of wheat grains,if $10^{10}$ grains are distributed each second?

The weight of $1 \times 10^{22}$ molecules of $CuSO_4 \cdot 5H_2O$ is ........... $g$.

How many moles of $Al_2(SO_4)_3$ are present in $50 \ g$ of the substance?

Vedclass Test Series

Exam Paper Generator

Online Exam Module