Which of the following correctly represents 3 | vedclass

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 $(2 	imes 1) + 16 = 18 \,g/mol$.Number of moles = $\frac{	ext{Given mass}}{	ext{Molar mass}} = \frac{360 \,

Vedclass · Accepted Answer

$(ii)$ and $(iv)$

Vedclass · Answer

(A) The molar mass of water $(H_2O)$ is $(2 	imes 1) + 16 = 18 \,g/mol$.Number of moles = $\frac{	ext{Given mass}}{	ext{Molar mass}} = \frac{360 \,g}{18 \,g/mol} = 20 \,moles$.Thus,statement $(ii)$ is correct.Number of molecules = $	ext{Number of moles} 	imes 	ext{Avogadro's number} (N_A)$.Number of molecules = $20 	imes 6.022 	imes 10^{23} = 1.2044 	imes 10^{25}$ molecules.Thus,statement $(iv)$ is correct.Therefore,the correct options are $(ii)$ and $(iv)$.

Which of the following correctly represents $360 \,g$ of water?

Similar Questions

State whether the following statement is true or false:
The elements having a valency of $1$ are called monovalent.

The molecule having an atomicity of $4$ is

$(a)$ Write the chemical formula of sodium sulphate.
$(b)$ Name one element each that forms a diatomic and a tetraatomic molecule.

Express each of the following in kilograms:
$(a)$ $5.84 \times 10^{-3} \,mg$
$(b)$ $58.34 \,g$
$(c)$ $0.584 \,g$
$(d)$ $5.873 \times 10^{-21} \,g$

The mass of one atom of oxygen is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module