Question

I am using all my points to ask this. please help

A compound containing 74.0% carbon, 8.7% hydrogen and 17.3% nitrogen. Determine the
empirical formula.​

if the compound above has a molar mass of 162.1g/mol. determine the molecular formula of the compound​

Answer 1

C5H7N

C10H14N2

Step-by-step explanation:

ok so lets lay out this nicely

elements C H N

percentage 74 8.7 17.3

mass number 12 1 14

divided percentage by mass 6.167 8.7 1.2357

now divide the smallest number with the 4.99 7.04 1

rest for instance 1,237 is the smallest.

so 6.167÷1,237

and 8.7 ÷1.237

and 1,237 divide 1.237

now the ratio is C5H7N

now for molecular formula find Mr of C5H7N which is (12×5)+7+14=81

next divide 162.1÷81=2

so now for molecular formula just multipily everythng by 2

C10H14N2