Question

what is the volume at stp of 7.1 gm of chlorine

Answer 1

molar mass of chlorine= Cl2 = 71g/mol

volume = mass × 22.7 l / molar mass

volume = 7.1g × 22.7 l / 71g

volume = 7.1×22.7 l /71

volume = 161.17 l /71

volume = 2.27 l

so 7.1 gram of chlorine contains 2.27 liter volume
_____________________________________

how we get formula,

volume = number of moles × 22.7

volume/22.7 = number of moles ______(1)

mass = number of moles × molar mass

mass/molar mass = number of moles _____(2)

volume/22.7 = mass/molar mass

volume = 22.7×mass/molar mass

___________________________
Basic information

• 1 mole of any substance contains 22.7 l volume at STP

• 1 mole of any substance contains Avogadro number of particles (atoms / moleculs)

• molecules = number of moles × 6.022×10^23 molecules

• atoms = atomicity × number of moles × 6.022 × 10^23 atoms

• mass = number of moles × molar mass

• volume = number of moles × 22.7

____________________________________
Rules of S.I units

1) If we express any physical quantities units in term of scientists name then we write all the letters in small letters if we only consider the first letter of it then we write in capital letters
ex : newton - N (not Newton)

2) no space between numerical value and unit
ex : 5m (not 5 m )

3) No comma and full stop after the unit
ex : 5N (not 5N, or 5N.)

4) S.I unit do not be take as plural it must always be in singular
ex :
5kg(not 5kgs)

10cm(not 10cms)

10 kilogram (not 10 a kilograms)

_______________________
please follow this rules

Answer 2

Answer2.24 dm^3

Explanation: