Question

how many grams of oxygen are in 4.50 mol of HNO3?

Answer 1

get the molar mass of HNO3

Answer 2

can you get the molar mass of HNO3?

Answer 3

i did i got 63.02g of HNO3 then what?

Answer 4

get the product of 4.50 mol and 63. 02 g

Answer 5

oh wait, xDDD

Answer 6

i got 283.59

Answer 7

i somehow forgot. xDD

Answer 8

oh, so you dont know how to solve it?

Answer 9

yup, xD i think i'm still lacking something

Answer 10

ok

Answer 11

sorry, xD

Answer 12

@Triton

Answer 13

its ok

Answer 14

Okay so, you were on the right track, you use atomic mass units so determine the Mr of HNO3 which would be

H=1
N=14
O=16 x3 = 48

all together is 63... now you have 4.50 mol, just times the ammount by the Mol and you get

283.5 g/mol

Answer 15

Sorry, correction, the mol unit is canceled out, so you're just left with grams.