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Author:
Mason
- Replies:
0
- Views: 151
WANTED: Approval of stoichiometry homework
Hey everyone!
I would really appreciate it if someone could give a quick look over my homework, and confirm that it is in fact correct. If you do I will be eternally grateful!
Question 1: When propane (C3H8) is burned in oxygen, the products are carbon dioxide and water. Write a balanced equation for this reaction and identify the mole ratios between propane and oxygen, and between propane and carbon dioxide.
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Author:
James Dj
- Replies:
0
- Views: 109
Pyrite oxidation homework problem
Determine the concentration of sulfate if 1g of pyrite oxidizes in 1L of water.
Here is my attempt at answering. Can someone let me know if i'm right please.
FeS2 + 7/2 H2O + 15/4 O2 = 2SO4 + Fe(OH)3 + 4H+
1000 mg/l pyrite = 8.33 mM (1000mg/l / 120g/mol)
1:2 ratio between FeS2 and SO4 8.33 mM*2 = 16.66mM sulfate produced
Thank you.
Author:
James Dj
- Replies:
0
- Views: 106
Pyrite oxidation homework problem
Determine the concentration of sulfate if 1g of pyrite oxidizes in 1L of water.
Here is my attempt at answering. Can someone let me know if i'm right please.
FeS2 + 7/2 H2O + 15/4 O2 = 2SO4 + Fe(OH)3 + 4H+
1000 mg/l pyrite = 8.33 mM (1000mg/l / 120g/mol)
1:2 ratio between FeS2 and SO4 8.33 mM*2 = 16.66mM sulfate produced
Thank you
Author:
Sophie
- Replies:
0
- Views: 191
STOICHIOMETRY HOMEWORK HELP
1) How many moles of ammonia can be made by reacting 12 mol of N2 with 17 mol of H2?
ANSWER CHOICES: A- 11 B- 12 C- 17 D- 24 E-29
2) If 49.60000000000001 g of O2 is mixed with 49.60000000000001 g of H2 and the mixture is ignited, what is the maximum mass of water that may be produced? H2 + O2 -> H20 ANSWER CHOICES: A- 55.7999999999997 g B- 99 g C- 49.60000000000001 g D- 446 g E- 88.20000000000003 g
[size=medium]3) According to
Author:
Marika
- Replies:
0
- Views: 149
Homework Problem Help Please!
I am having trouble with one homework problem and cannot get past it. Maybe I am making it over complicated? -- Here is the problem:
Given: A 7.38g sample of HCN contains 0.273g of H and 3.83g of N
Problem: Find the mass of C in a sample of HCN with a mass of 3.40g.
Any help greatly appreciated!
Author:
Eamuel
- Replies:
0
- Views: 211
Rates of reaction homework Quest.
Hello!
I just have a quick question concerning rates of reactions. I encountered the following problems in my TB:
In the reaction 2A :rarrow: 3B, [A] drops from 0.5684M to 0.5522M in 2.50 min. What is the average rate of formation of B during this time interval expressed in Ms-1
I've attached the solution to the problem. I've also attached the formula to getting the rate of reaction
[size=medium]Wha
Author:
Eugene
- Replies:
0
- Views: 35
Chemistry Homework Help (High School) - Isomers and Stability
4. Use values of the Gibbs free energy change of formation, given below, to deduce whether the cis– or trans– isomer of but-2-ene is the more stable at 25 °C. At what temperature will the two isomers have the same stability?
I've been stuck on this question for a while. For part 1 is it trans is more stable because it has a lower enthalpy change and therefore lower energy/more stability? And for part 2 what is the difference (in the data provided) between Gf, Hf, and S and the corresponding l