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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: cerraval on February 27, 2018, 10:15:59 AM

Title: {molar fraction}
Post by: cerraval on February 27, 2018, 10:15:59 AM

What is the molar fraction of O2, CO2 and N2 in a 0.2 mol O2,0.3 mol CO2,0.7 mol N2 gas mixture?

Thanks in advance, that's very important to me. I'd love to know a lot more than I know but I'm new to these issues so, can anyone  help me, please?

{MOD Edit - useful title}

Title: Re: PLEASE HELP
Post by: Corribus on February 27, 2018, 10:24:19 AM

Well they give you the number of moles of each gas in the mixture, so this is pretty straightforward. At this forum, showing your work is required to receive help. So why don't you describe what you think the answer is, and then we can lend assistance.

Title: Re: {molar fraction}
Post by: Borek on February 27, 2018, 12:56:38 PM

To add to what Corribus wrote: start with the definition.