Biology Forums - Study Force

Science-Related Homework Help Chemistry Topic started by: Jess8219 on May 4, 2020



Title: What amount (in moles) of compound are in a sample of 39.2g of silicon dioxide, SiO?2
Post by: Jess8219 on May 4, 2020
Just wanted to check my answer, so would it be 0.6523g/mol?


Title: Re: What amount (in moles) of compound are in a sample of 39.2g of silicon dioxide, SiO?2
Post by: bio_man on May 4, 2020
silicon dioxide has a molar mass of 60.08 g/mol

Take 39.2g and multiply it by 1g / 60.08 mol

\(39.2\ g\times \frac{1\ mol}{60.08\ g}=0.6524\ mol\)

Or... simply 0.652 moles to the correct number of significant digits


Title: Re: What amount (in moles) of compound are in a sample of 39.2g of silicon dioxide, SiO?2
Post by: Jess8219 on May 4, 2020
Ok Great!