Question

Which has highest mass 25 gram of HG. Or 2.24 gram of SO2 gas at ntp or 3.01 into 10 power 23 molecules of Co2 or 0.2 mole of an O2 gas

Answer 1

Answer: 1. 25 g of $Hg$

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

1) 25 g of $Hg$

2) 2.24 g $SO_2$ at NTP

3) $3.01\times 10^{23}$ molecules of $CO_2$

$\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadro's no}}=\frac{3.01\times 10^{23}}{6.023\times 10^{23}g/mol}=0.5moles$

1 mole of $CO_2$ weighs = 44 g

0.5 mole of $CO_2$ weighs = 22 g

4) 0.2 moles of $O_2$ gas

1 mole of $O_2$ weighs= 32 g

0.2 moles of $O_2$ weighs=$\frac{32}{1}\times 0.2=6.4g$