What is the number of water molecules present | vedclass

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

Question

(D) The density of water is $1 \ g/mL$,so $1 \ mL$ of water has a mass of $1 \ g$.The molar mass of water $(H_2O)$ is $18 \ g/mol$.The number of moles

Vedclass · Accepted Answer

$3.34 	imes 10^{22}$

Vedclass · Answer

(D) The density of water is $1 \ g/mL$,so $1 \ mL$ of water has a mass of $1 \ g$.The molar mass of water $(H_2O)$ is $18 \ g/mol$.The number of moles in $1 \ g$ of water is $n = \frac{1 \ g}{18 \ g/mol} = 0.0556 \ mol$.The number of molecules is calculated by multiplying the number of moles by Avogadro's number $(N_A = 6.022 	imes 10^{23} \ mol^{-1})$:Number of molecules $= 0.0556 \ mol 	imes 6.022 	imes 10^{23} \ mol^{-1} \approx 3.34 	imes 10^{22}$ molecules.

What is the number of water molecules present in $1 \ mL$ of water?

Similar Questions

The number of $H$ atoms in $27 \ g$ of water is .........

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

In $3$ moles of ethane $(C_{2}H_{6})$,calculate the following:
$i.$ Number of moles of carbon atoms.
$ii.$ Number of moles of hydrogen atoms.
$iii.$ Number of molecules of ethane.

Which gas among the following contains the maximum number of molecules at $STP$? (Molar masses in $g \ mol^{-1}$: $CO_{2}=44, Ar=39.9, CH_{4}=16, O_{2}=32$)

Which of the following contains the maximum number of molecules?

Vedclass Test Series

Exam Paper Generator

Online Exam Module