Question

The visible universe is estimated to contain ${10}^{22}$ stars. How many moles of stars are present in the visible universe?

• A. $6.023\times {10}^{23}$ moles
• B. $6.023$ moles
• C. $1.5$ moles
• D. $0.0166$ moles

Answer 1

Answer: (D)

$0.0166$ moles

1 mole of stars equals $6.023\times {10}^{23}$ stars

$\therefore$ Number of moles of stars $=\frac{{10}^{22}}{N_A}$ $=\frac{{10}^{22}}{6.023\times {10}^{23}}$$=0.0166$ moles

Option $D$ is correct.