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E 17

Posted: Sun Oct 06, 2019 11:44 pm
by Snigdha Uppu 1G
Which sample in each of the following pairs contains the
greater number of moles of atoms? (a) 75 g of indium or 80 g of
tellurium; (b) 15.0 g of P or 15.0 g of S; (c) 7.36 3 10 27 atoms of
Ru or 7.36 3 10 27 atoms of Fe.

Re: E 17

Posted: Sun Oct 06, 2019 11:46 pm
by Tanmay Singhal 1H
A) 75 g of indium
B) 15 g of P
C) same number of moles

Re: E 17

Posted: Sun Oct 06, 2019 11:47 pm
by Snigdha Uppu 1G
Thank you for answering my question

Re: E 17

Posted: Thu Oct 10, 2019 3:04 pm
by connie 2C
for part a and b, you would use the molar mass of the element to calculate the number of moles in each sample of the element. for part c, you would use avogadro's number to calculate the amount of moles in amount given.

Re: E 17

Posted: Sun Oct 13, 2019 4:55 pm
by Cynthia Rodas 4H
Parts (a) and (b) use the equation m= n * M.
m- mass of the sample
n- amount in moles
M- molar mass

Part (c) uses the equation n = N/NA
n- amount in moles
N- number of objects
NA- Avogadro's constant