The mass of a molecule of water is

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

Question

(A) The molar mass of water $(H_2O)$ is $18 \ g/mol$.According to the mole concept,$1 \ mol$ of water contains $6.022 	imes 10^{23}$ molecules and ha

Vedclass · Accepted Answer

$3 	imes 10^{-26} \ kg$

Vedclass · Answer

(A) The molar mass of water $(H_2O)$ is $18 \ g/mol$.According to the mole concept,$1 \ mol$ of water contains $6.022 	imes 10^{23}$ molecules and has a mass of $18 \ g$.Mass of $1$ molecule of water $= \frac{18 \ g}{6.022 	imes 10^{23}} \approx 2.99 	imes 10^{-23} \ g$.Converting this to kilograms: $2.99 	imes 10^{-23} \ g 	imes \frac{1 \ kg}{1000 \ g} \approx 3 	imes 10^{-26} \ kg$.

Similar Questions

Number of atoms in the following samples of substances is largest in

Which of the following is the Loschmidt number?

What is the number of atoms in $280 \ g$ of $Fe$?

What is the volume occupied by $1$ molecule of water, if its density is $1 \,g \,cm^{-3}$?

How many $H$ atoms are present in $0.046 \ g$ of ethanol $(C_2H_5OH)$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module