What is the mass in grams of 5.90 mol C8H18?

Question

What is the mass in grams of 5.90 moles of C8H18? 
A) 0.0512 g
B) 19.4 g
C) 89 g
D) 673 g  
Please indicate your answer by selecting either A, B, C, or D. Thank you! 😊

Anonymous · Accepted Answer

D)...114g/mol. x 5.9mol. = 673g. (mols. cancel).

Anonymous · Answer

You first need to find out the weight of one mole of C8H18.  Go to the periodic table to get the weights of all the elements in your compound then add them.
C = 12 grams x 8 = 96 grams
H = 1 gram x 18 = 18 grams
Total = 96 + 18 = 114 grams in one mole.  
If you have 5.9 moles, multiply this by the weight of one mole (114 grams) = 672.6  rounded to 673 grams in 5.9 moles.
Your answer is D.

Anonymous · Answer

I hope this answer will help you.
number of moles= 5.90 mol
molar mass of C8H18 = 12(8) + 1(18)
                                   = 96 + 18                                   = 114g/mol
If number of moles = Mass / Molar mass
Therefore mass= number of moles x molar mass
                           5.90mol x 114g.mol                          = 672.6g which is approximately 673        Therefore the answer is D

Anonymous · Answer

Use the equation mass=no. of moles X Relative formula mass C8H18 = (8x12)+(1x18)=114 (so thats the Relative formula mass) no. of moles = 5.ninety so mass = 5.ninety x 114 =672.6g which may be rounded to 673g do its D

Mr. Clovis Kulas Sr. · Answer

D
(128+118)*5.9=672.6=673
(molar mass of c8h18)*no of moles
HEY DUDE which CLASS you are.want to add me asyour friend

Anonymous · Answer

1 mol of c8h18 weighs 114g
therefore 5.90 moles of c8h18 weighs xg
x=(114*5.90)/1
therefore x=672.6g~673g
the answer is D
hope this helped!!!

Prof. Dayne Kunde · Answer

I wonder if we are all doing the same school. Where do you guys go?

Anonymous · Answer

it,s D because wt=m.wt.* moles

Anonymous

What is the mass in grams of 5.90 mol C8H18?

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