Question

Which contains a greater number of molecules?
a) 1 mole of carbon dioxide
b) 4g of hydrogen
c) 33,6 litres of oxygen at STP
d) 6g of helium

Tell me the option and WHY that is the answer and not others (for brainliest).

Answer 1

NO OF MOLECULES = MOLES × AVRAGADRO NUMBE

HENCE

1. 1 MOLE CO2= 1×6.022×10^23

=6.022×10^23

2. 4G OF HYDROGEN

MOLE OF HYDROGEN = 4/1(GIVEN MASS / MOLAR MASS)

=4 MOLES

NO OF MOLECULES = 4×6.022×10^23

= 24.088×10^23

3. NO OF MOLES OF OXYGEN = 33.6/22.4 (GIVEN VOLUME / 22.4) =1.5 MOLES

NO OF MOLECULES = 1.5×6.022×10^23

=9.033×10^23 MOLECULES

4. MOLES OF HYDROGEN = 6/2

=3 MOLES

NO OF MOLECULES = 3×6.022×10^33

=9.066×10^23

HENCE HYDROGEN HAS HIGHEST NO OF MOLECULES

HOPE THAT THIS WILL HELP YOU OUT ✔✔