Chemical Reaction:
2Mg+O2 ===> 2MgO
Mass of crucible and lid- 30.89g
Mass of crucible, lid and Mg Ribbon- 31.04g
Mass of crucible lid and product- 31.08g
Calculate the mass of magnesium metal and the mass of the product. Use the law of conservation of mass to calculate the mass of oxygen that combined with magnesium.
I think I got the mass of the magnesium metal and the product, but I'm not sure. I got 0.15g of magnesium metal and 0.40g of magnesium oxide. Am I right? And how would I calculate the mass of the oxygen that reacted?
Thanks!
2007-09-20 09:38:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Look at the increase in mass between the second and the third readings - 0.04g. That is your oxygen!
The mass of MgO is 0.19g.
0.15 + 0.04 = 0.19.
2007-09-20 09:47:49 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
seventy one.11% First distinctive the molecular weight of each and every molecule via what share each and every has (ex: MW of C is 12 and there are 2 molecules so 12x2=24). C2= 12x2=12 H2= 1x2=2 O4= 16x4=sixty 4 Then upload all of them as much as get the entire weight which equals ninety. 12+2+sixty 4=ninety Then divide the oxygen weight via the entire weight and multiply via one hundred to get the proportion. (sixty 4/ninety)x100=seventy one.11% wish this helps!
2016-12-26 20:08:56 · answer #2 · answered by ? 4 · 0⤊ 0⤋
u have the chemistry at the wrong place at the wrong time,its time for loveology
2007-09-20 09:53:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋