What weight of sodium contains the same numbe | vedclass

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

Question

(A) Step $1$: Calculate the number of moles in $16\, g$ of sulphur.Atomic mass of sulphur $(S)$ = $32\, g/mol$.Moles of $S = \frac{	ext{Given mass}}{

Vedclass · Accepted Answer

$11.5$

Vedclass · Answer

(A) Step $1$: Calculate the number of moles in $16\, g$ of sulphur.Atomic mass of sulphur $(S)$ = $32\, g/mol$.Moles of $S = \frac{	ext{Given mass}}{	ext{Atomic mass}} = \frac{16\, g}{32\, g/mol} = 0.5\, mol$.Step $2$: Determine the number of atoms.Since $1\, mol$ of any element contains $6.022 	imes 10^{23}$ atoms (Avogadro's number),$0.5\, mol$ of $S$ contains $0.5 	imes 6.022 	imes 10^{23} = 3.011 	imes 10^{23}$ atoms.Step $3$: Calculate the mass of sodium $(Na)$ containing the same number of atoms.Atomic mass of sodium $(Na)$ = $23\, g/mol$.To have the same number of atoms $(3.011 	imes 10^{23})$,we need $0.5\, mol$ of sodium.Mass of $Na = 	ext{Moles} 	imes 	ext{Atomic mass} = 0.5\, mol 	imes 23\, g/mol = 11.5\, g$.Therefore,$11.5\, g$ of sodium contains the same number of atoms as $16\, g$ of sulphur.

What weight of sodium contains the same number of atoms as are present in $16\, g$ of sulphur (in $, g$)?

Similar Questions

Raunak took $5 \, mol$ of carbon atoms in a container and Krish also took $5 \, mol$ of sodium atoms in another container of the same weight. $(a)$ Whose container is heavier? $(b)$ Whose container has a greater number of atoms?

Which amongst the following has a greater number of atoms,$11.5 \, g$ of sodium $(Na)$ or $15 \, g$ of calcium $(Ca)$? How? (Given: atomic mass of $Na = 23 \, u$,$Ca = 40 \, u$)

Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is $9.1 \times 10^{-28} \,g$). Which one is heavier (in $,g$)?

Name the international organisation which approves the names given to the elements. Write the symbol of tungsten.

State whether the following statement is true or false:
Atomic radius is measured in nanometres. $1 \, m = 10^9 \, nm$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module