500 mL of NH 3 contains 6.0 × 1023 molecules at STP. How many molecules are present in 100 mL of CO 2 at STP?

Question

500 mL of NH 3 contains 6.0 × 1023 molecules at STP. How many molecules are present in 100 mL of CO 2 at STP? (A) 6 × 1023 (B) 1.5 × 1023 (C) 1.2 × 1023 (D) none of these

Tardigrade Admin · Accepted Answer

( PV 1/ n 1 RT ) =( PV 2/ n 2 RT ) ( V 1/ n 1) =( V 2/ n 2) (500/1) =(100/ n 2) n 2 =(1/5) As 1 mole of CO 2 contains 6.0 × 1023 molecules. So (1/5) mole of CO 2 contains 1.2 × 1023 molecules.

Q. $500 m L$ of $N H_{3}$ contains $6.0 \times 1 0^{23}$ molecules at STP. How many molecules are present in $100 m L$ of $C O_{2}$ at STP?

$6 \times 1 0^{23}$

$1.5 \times 1 0^{23}$

$1.2 \times 1 0^{23}$

none of these

Q. 500mL of NH3​ contains 6.0×1023 molecules at STP. How many molecules are present in 100mL of CO2​ at STP?

6×1023

1.5×1023

1.2×1023

none of these

n1​RTPV1​​=n2​RTPV2​​ n1​V1​​=n2​V2​​ 1500​=n2​100​ n2​=51​ As 1 mole of CO2​ contains 6.0×1023 molecules. So 51​ mole of CO2​ contains 1.2×1023 molecules.

Q. $500 m L$ of $N H_{3}$ contains $6.0 \times 1 0^{23}$ molecules at STP. How many molecules are present in $100 m L$ of $C O_{2}$ at STP?

$6 \times 1 0^{23}$

$1.5 \times 1 0^{23}$

$1.2 \times 1 0^{23}$