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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Rogue on January 14, 2024, 07:48:49 AM

Title: How many atoms are in 100g of phosphorus vapour
Post by: Rogue on January 14, 2024, 07:48:49 AM

I got this question during my exam today and i was so confused what i fid did was was get the number of moles which turned out to be 0.803(100÷31×4) and multiplied it by Avogadro's number. Is this right it turmed out to be smth like 4.45×10^23 or 24

Title: Re: How many atoms are in 100g of phosphorus vapour
Post by: Hunter2 on January 14, 2024, 08:05:59 AM

4,85  * 10^23 is correct.

Title: Re: How many atoms are in 100g of phosphorus vapour
Post by: mjc123 on January 16, 2024, 05:02:48 PM

That's wrong if the question was how many atoms - not how many P₄ molecules.

Title: Re: How many atoms are in 100g of phosphorus vapour
Post by: Hunter2 on January 16, 2024, 05:05:08 PM

Yes you are right.