Chemical Equation Help: ASAP! Please.
Posted: Sun Dec 31, 2006 12:55 pm
Please be kind enough to help out.
I really need this help ASAP.
HBr + Mg(OH)2 -> H2O + NaCl
H2S + Ba(OH)2 -> H2O + NaCl
I don't know if these are correct/balanced.
Can you help me out ASAP?
Thanks!
Also, how do you do this problem?
4AU + 8KCN + O2 + 2H2O -> 4KAu(CN)2 + 4KOH
How many moles of KCN are required to extract 29.0 g pf gold (about an ounce) of gold?
Also, the other day I could not remember how to do this type of problem:
Nitrogen oxide reacts instantly with oxygen gas to form nitrogen dioxide. Write the equation. In one experiement, 0.866 moles of NO is mixed with 0.503 moles of oxygen gas. Calculate which of the reactants is the limiting one? How many moles of nitrogen dioxide are produced?
or this simple one that I simply forgot how to use 6.02EE23.
The carat is the unit of mass used by jewelers. One carat is exactly 200 mg. How many carbon atoms are present in a 24-carat diamond?
If you could walk me through each problem, that would be greatly appreciated. Thanks.
And sorry for all of the questions (my midterm is coming up and I have a lot of studying.. we don't use that great of a book either) and I really need to know how to do all of these very shortly.
I really need this help ASAP.
HBr + Mg(OH)2 -> H2O + NaCl
H2S + Ba(OH)2 -> H2O + NaCl
I don't know if these are correct/balanced.
Can you help me out ASAP?
Thanks!
Also, how do you do this problem?
4AU + 8KCN + O2 + 2H2O -> 4KAu(CN)2 + 4KOH
How many moles of KCN are required to extract 29.0 g pf gold (about an ounce) of gold?
Also, the other day I could not remember how to do this type of problem:
Nitrogen oxide reacts instantly with oxygen gas to form nitrogen dioxide. Write the equation. In one experiement, 0.866 moles of NO is mixed with 0.503 moles of oxygen gas. Calculate which of the reactants is the limiting one? How many moles of nitrogen dioxide are produced?
or this simple one that I simply forgot how to use 6.02EE23.
The carat is the unit of mass used by jewelers. One carat is exactly 200 mg. How many carbon atoms are present in a 24-carat diamond?
If you could walk me through each problem, that would be greatly appreciated. Thanks.
And sorry for all of the questions (my midterm is coming up and I have a lot of studying.. we don't use that great of a book either) and I really need to know how to do all of these very shortly.