The largest number of molecules are in:

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

Question

(A) To find the number of molecules,we calculate the number of moles for each substance using the formula: $n = \frac{	ext{mass}}{	ext{molar mass}}$

Vedclass · Accepted Answer

$36 \ g \ H_2O$

Vedclass · Answer

(A) To find the number of molecules,we calculate the number of moles for each substance using the formula: $n = \frac{	ext{mass}}{	ext{molar mass}}$.$A) \ 36 \ g \ H_2O: n = \frac{36}{18} = 2 \ 	ext{moles}$.$B) \ 28 \ g \ CO: n = \frac{28}{28} = 1 \ 	ext{mole}$.$C) \ 46 \ g \ C_2H_5OH: n = \frac{46}{46} = 1 \ 	ext{mole}$.$D) \ 54 \ g \ N_2O_5: n = \frac{54}{108} = 0.5 \ 	ext{moles}$.Since the number of molecules is directly proportional to the number of moles $(N = n 	imes N_A)$,the substance with the highest number of moles will have the largest number of molecules. Thus,$36 \ g \ H_2O$ contains the largest number of molecules.

Similar Questions

The mass of a molecule of water is

The mass of $10^{21}$ atoms of $Cu$ is ..... grams.

If one atom of an element $X$ weighs $6.643 \times 10^{-23} \ g$,then find the number of moles of atoms in $50 \ kg$ of element $X$. (in $moles$)

How many moles of helium gas occupy $22.4 \ L$ at $0^o C$ and $1 \ atm$ pressure?

Find out the number of carbon atoms present in $0.35 \ mol$ of glucose.

Vedclass Test Series

Exam Paper Generator

Online Exam Module