Question

A. calculate the molar mass of S8 B. convert into mole1. 12g of oxygen gas2. 32g of oxygen molecule

Answer 1

A) = molar mass of S8
atomic mass of S =32
molar mass of S8 = 32×8

ans= molar mass of S8 = 256u

B)= 1) = O2 = 16 u

no. of moles = given mass ÷ molar mass
no. of moles = 12 ÷32
no.of moles = 0.375

ans = 0.375 moles

B)=2)= O2 = 16 u

no.of moles = given mass ÷ molar mass
no.of moles = 32 ÷12
no.of moles = 2.66

ans= 2.66 moles