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Moles homework

I forgot how to work out Moles, the question is What is the mass od the following? A) Sodium (Na)
Look at the atomic mass of sodium on a periodic table.
Write out the formula for moles. Rearrange it to find mass.
Reply 3
Original post by icequeenTM
Write out the formula for moles. Rearrange it to find mass.


I got 23, what is the formula?
Moles = mass/molar mass
Reply 5
Need help with this question, How much would the following weigh in grams?

A) 0.8 moles of nickel (Ni)

I don't know the equation for this question.
Original post by SBizzy
Need help with this question, How much would the following weigh in grams?

A) 0.8 moles of nickel (Ni)

I don't know the equation for this question.


I think (moles is a problem area-especially with the harder questions):

0.8x28 (Ar for Ni) =22.4 g

Mass= Moles x Ar or Mr
Reply 7
Original post by Bluecoffeebean
I think (moles is a problem area-especially with the harder questions):

0.8x28 (Ar for Ni) =22.4 g

Mass= Moles x Ar or Mr
On the answers it says 47g..
Original post by SBizzy
On the answers it says 47g..


How would you work it out then because I'm sure I got the equation right?
Reply 9
Original post by Bluecoffeebean
How would you work it out then because I'm sure I got the equation right?

You tell me, I don't know the equation.
Original post by SBizzy
You tell me, I don't know the equation.


It is 47g but the equation is also right... now excuse me while I sit in a corner revising moles

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