Need HW help for chemistry, can anyone help me? i will award best answers promptly in return.
1.) How many molecules are in 83.8 g of Cl2?
Answer in units of molec.
2.) How many moles of atoms are there in 7:918 to the(*23*)power times
1023 atoms Mg? Answer in units of mol.
3.)For 674 g of butadiene (C4H6) calculate the
number of moles. Answer in units of mol. Calculate the number of molecules. Answer
in units of molec.
Thanks a bunch, if you can actually explain it, i'd appreciate that too.
2007-10-04 13:41:48 · 1 answers · asked by Jordan F 1 in Science & Mathematics ➔ Chemistry
REB, thank you SOOOO much. Oh my gosh, i've been hearing about this for 2 weeks now, and you've made more sense than anyone i've heard so far!!!!!! you do not know how relieved I am. I hope you know I will be printing your answer out!
2007-10-04 14:09:47 · update #1
Here is the concept.
A mole is the grams equivalent of the molecular mass. If you know the moles (as in your #3) divide by the molecular mass to get the moles
A mole has 6.02 x10E23 particles. This is Avogadro's number. If you know the moles (your #1), multiply by Avo to get the particles. If you have the particles (your #2) divide by Avo to get the moles
2007-10-04 13:47:41 · answer #1 · answered by reb1240 7 · 0⤊ 0⤋