The weight of 1 times 10^{22} molecules of Cu | vedclass

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

Question

(D) The molar mass of $CuSO_4 \cdot 5H_2O$ is calculated as: $63.5 + 32 + (4 	imes 16) + 5 	imes (2 + 16) = 63.5 + 32 + 64 + 90 = 249.5 \ g/mol$. $6

Vedclass · Accepted Answer

None of these

Vedclass · Answer

(D) The molar mass of $CuSO_4 \cdot 5H_2O$ is calculated as: $63.5 + 32 + (4 	imes 16) + 5 	imes (2 + 16) = 63.5 + 32 + 64 + 90 = 249.5 \ g/mol$. $6.022 	imes 10^{23}$ molecules of $CuSO_4 \cdot 5H_2O$ weigh $249.5 \ g$. Therefore,the weight of $1 	imes 10^{22}$ molecules is: $	ext{Weight} = \frac{249.5 	imes 1 	imes 10^{22}}{6.022 	imes 10^{23}} \ g$. $	ext{Weight} = \frac{249.5}{60.22} \ g \approx 4.143 \ g$. Since $4.143 \ g$ is not exactly $4.159 \ g$,the correct option is $D$.

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

Similar Questions

If $N_A$ is Avogadro’s number,then the number of valence electrons in $4.2 \ g$ of nitride ions $(N^{3 -})$ is ................... $N_A$.

Which of the following contains $6.02 \times 10^{22}$ molecules?

$A$ sample of phosphorus trichloride $(PCl_3)$ contains $1.4$ moles of the substance. How many atoms are there in the sample?

If the price of $1 \ kg$ of common salt is $7$ rupees and the price of $1 \ kg$ of sugar is $14$ rupees,then what is the cost of $1 \ mole$ of salt and sugar?

What is the number of oxygen atoms in $8 \ g$ of ozone $(O_3)$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module