complete and balance the equation?
829175
AB + CD ---> AD + CB\nlogic doesn't work here as Si doesn't react/bond with Ca or Phosphorus.and Ca(PO) should be Ca3(PO4)2\nand SiO should be in the form of SiO2. \nso unless you want hypothetical compounds SiO2 won't form with either of the two other reactants.\nbased on the forumlae from an SI data book, the above reaction would not balance.\ngood luck solving this one. :-)
531205
2 + 2 = 4\n\nthats all I got
148175
The correct balanced equation is:\n2ZnS + 3O2 --> 2ZnO + 2SO2\nThis is BALANCED\nMr chemistry teacher, you didnt balance your equation,...and i'm in the ninth grade
961595
umm..are you missing an equals sign somewhere or am i really dumb? how do you figure out what x is unless you have both sides of the equation?
408554
yes. take out an x \nyou answer should be x(x+3)
663777
SOrry, I can't help you. If I had the formulas I could do it, but there is no way I remember that off the top of my head! Good luck
32370
By looking at the coefficients in a balanced equation.
17656
Best technique is to look for where it is unbalanced and change it so it is balanced. Repeat until it is balanced.\n\neg. We need 2 hydrogen here on the left, so go for:\n\nMg + 2HCl -> MgCl + H2\n\nNow we need another 2 as we have 2 Cl on the left and one of the right.\n\nMg + 2HCl -> 2MgCl + H2\n\nNow we need to have 2 Mg on the left as we have 2 Mg on the right. So we get:\n\n2Mg + 2HCl -> 2MgCl + H2\n\nAll balanced so that is the answer.
976256
BALANCED . . . \n\n2Sr + O2 ---> 2SrO\n\n. . . and solved . . .\n\nGet an "A".
973095
Unless your leaving out some necessary charge, it is already balanced. On the left side if the arrow: 1 Zn, 1 S, and 1 O2. On the right side: 1 Zn, 1 S, and 1 O2. Now if there are charges or subscripts that are being left out, then it may not be balanced. The total charge on each side must be equal. Just remember that to balance, make sure that there is the same number of atoms for each element on each side of the arrow.
701654
Instead of memorizing all the equations,understand how they are derived.Try to do it yourself.If you can't go to someone who knows for help.
157730
I think FePO4 +O2 >>>>> Fe2O3 + PO2. balance it and solve it . n its simple stoichiometry.
728397
You need to first balance the equation.\n\n2CO + O2 --> 2CO2\n\nUsing this you find the answer to be D.
542294
Well, you have O x 2 on the left, and O x 3 on the right, so the number next to "O2" on the left has to be at least 3.\n\nThat would mean that, on the right, the number next to "PbO" has to be at least 2.\n\nAlso, since you have one "PbS" on the left, the numbers next to "PbO" and "SO2" on the right have to be the same number.\n\nIf you make both numbers on the right "2", then the number next to "PbS" on the left has to be 2.\n\nSo the complete balanced equation is:\n\n2 PbS + 3 O2 ---> 2 PbO + 2 SO2
123389
distribute the x to all terms inside the equation\n\n2x^2-26x
110265
The equation is meant to record the results of an experiment.  The reactants (stuff you started with) are written to the left and the products (the stuff you end up with) is written to the right.\nTo balance an equation, only the coefficients (the numbers in front of the chemicals) may be changed.\nIf you change the symbols, you change the type of atoms used.\nIf you change the formulas or subscripts, you change the chemicals (the molecules) used in the experiment.
677826
1) is already balanced... to be more precise\n2C2H6 + 7O2 --> 4 C02 + 6H2O\n\n2) Fe2O3 + (3)H2SO4 --> Fe2(SO4)3 + (3)H2O