Question

.Which of the following possess highest mass? (A) 2.24 L SO2 at S.T.P. (B) 0.4 mole of CO2 gas (C) 10 g calcium (D) 3.01 × 1023 molecules of H2O

Answer 1

Answer:

firstly, all given quantity are change into mole since,mole which has highest value which has highest mass.

a.volume=mole*22.4(litre)  at s.t.p

mole of SO2= 2.24/22.4=0.1 mole

b. o.4 mole of CO2 gas

c.mole=given mass/molar mass=10/40=0.25 mole

d. mole =no of molecules / avgadro no.=3.01*10^23/6.022*10^23= 0.5 mole

now, clearly from this

0.5 mole has greater mass