Question

How many phosphorus atoms are present in 0.15 mole of $P_4$ molecules?

• A. $1.67\times {10}^{22}$
• B. $3.6\times {10}^{23}$
• C. $0.60$
• D. $6.6\times {10}^{23}$

Answer 1

Answer: (B)

$3.6\times {10}^{23}$

$1moleof{P}_{4}containP=4mole1mole{P}_{4}containatoms=4\times 6.02\times {10}^{23}Patoms\therefore 0.15mole{P}_{4}contain=4\times 6.02\times 0.15\times {10}^{23}=3.61\times {10}^{23}Patoms$