quick question:
work out the following and tell me the answer you get. here goes

A flask contains 0.750 mole of CO2. what mass of carbon dioxide is in the sample.

Question

quick question:
work out the following and tell me the answer you get. here goes

A flask contains 0.750 mole of CO2. what mass of carbon dioxide is in the sample.

roku · Answer

question number two:
how many moles of methane are there in a 23.6 gram 
sample

.sam. · Answer

What do you get for #1?

anonymous · Answer

No : of moles =  Given mass/ Molar mass

0.75 =  x/44

x = 33 gm

anonymous · Answer

Molar Mass for C: 12, O: 16, H:1
Mass of CO2 = 0.75*(12+2(16)
x = 33 g

for Methane (CH4), 
Mol CH4 = 23.6/ (12+4)
= 1. 475 mol

roku · Answer

got the same answers which means i understand somewhat
 posting another question please respond

anonymous · Answer

It's not that hard (: my chem teacher gave us this diagram, it makes it simpler to understand
:|dw:1348400717393:dw|

So basically to get the mole, you have to divided the given info (mass, volume, no. of particles) with the molar mass, temperature, or avogrado's number (: