What is the mass of 0.8 moles of Iron?
A) 12.1 grams
B) 25.2 grams
C) 44.7 grams
D) 100.8 grams

Question

What is the mass of 0.8 moles of Iron?
A) 12.1 grams
B) 25.2 grams
C) 44.7 grams
D) 100.8 grams

ramirocruzo · Answer

Mass=Number of moles X Atomic Mass or Molecular Mass
Atomic Mass of Fe= 56u

ilovebmth1234 · Answer

i saw that on the yahoo answers but the answer has to be A,B,C,or D

ramirocruzo · Answer

???? I didnt copy...... (T~T)
 Its C) 44.7gm

ilovebmth1234 · Answer

no im sorry i didnt think you copied lol i was just saying i saw that on a yahoo question :) im sorry and thanks would you like to help me with one more?

ramirocruzo · Answer

Yup....

ramirocruzo · Answer

???

ilovebmth1234 · Answer

Using the Periodic Table, determine the atomic mass of Na2C2O4.
	
A) 134 grams
	
B) 124 grams
	
C) 114 grams
	
D) 104 grams

ramirocruzo · Answer

Just solve it yourself... :p

2Na+2C+4O=2(23)+2(12)+4(16)=???

Note: Its molecular mass not atomic mass

whpalmer4 · Answer

Add up the atomic mass of two sodium atoms, two carbon atoms, and four oxygen atoms. That's your answer.  Should be able to do these on your own with the knowledge you have now.

ramirocruzo · Answer

Hmmmmm,,, It comes up to be 134gms....

ilovebmth1234 · Answer

thanks guys and @whpalmer4 thanks for breaking it down i appreciate both of you