A)A hydrocarbon burns completely, producing 7.2 grams of water and 7.2 liters of CO2 at standard conditions (S.T.P.). What is the empirical formula of the Hydrocarbon? (Recall that the molar volume of
A)FB)NC)BeD)LiE)He
How do you solve this =/-If you can find the molar mass, that will tell you the atomic mass of the element.
Since 1 mole = 6.023 x 10^23 atoms, 1 mole of this element will weigh
Okay this is under electrochemistry, and in my ap chem class we havent even reviewed general chemistry and i have no clue or have ever seen this kind of question so please help me?
When this partial e
A sample of cocaine, C17H21O4N, is diluted with sugar, C12H22O11. When a 1.00-mg sample of this mixture is burned, 1.00 mL of carbon dioxide (d=1.80g/L) is formed. What is the percentage of cocaine in
ammonium hydrogen sulfide decomposes according to the reaction.
NH4HS(s) ⇌ NH3(g) + H2S(g)Kc=0.11 at 250°C
If 55.0g of solid NH4HS is placed in a sealed 5.0L container,what is the partial pressure o
What mass of MgSO4 · 7H2O is required to
prepare 700 mL of a 0.476MMgSO4 solution?
please help me, ive never been good at these, so can somebody kinda teach me it.
please give me a step by step instru
18.4g NO2
1.48kg CO2
32.4g KNO3
152.4kgNa2SO4
please help me! please at least explain one of these so that i can figure it out! i really do want to understand how to do these. thanks.-I am only showi
The pH of a 1 L solution containing 100 mL of 1M acetic acid and 4.1g of sodium acetate (formula weight 82g/mol; pK=4.76) is...
a) 2.76
b) 3.76
c) 4.76
d) 5.76
e) 6.76
Please show the full solution.
I found an old chemistry set at an antique store, so I brought it home and started fiddling around with it. Many containers were unlabeled, and I want to figure out what they are. If you need more inf
A test for primary or secondary alcohols is oxidation with chromate (CrO4^-2). The chromate solution is orange and changes to green when the reduced Cr^+3 is formed. Indicate if a color change would o
The products include I2 and Mn+2.
1. 12.5 mL
2. 21.56 mL
3. 3.00 mL
4. 7.29 mL-find moles
0.0200 L (0.310 mol/Litre) KI = 0.0062 moles of KI
by the reaction
2 KMnO4&10 KI -->5 I2&2 Mn+2
0.0062 mol
Thanks a lot to whoever answers Im just trying to do my homework but i dont understand it much. I would greatly appreciate it if you could do at least one. Thanks again
Ok so I know the atomic mas fo
what is the molarity of sulfate ions?
Answer in units of M-1 mol Al2(SO4)3 releases 3 mol SO42- in solution.
0.046 mol Al2(SO4)3 x (3 mol SO42- / 1 mol Al2(SO4)3) = 0.138 mol SO42-
M = mol / L = 0.1
So Im on my last attempt on the Homework problem and I wanna make sure i got this right.
Please tell me if what i calculated is correct. Please correct me if I totally messed up.
HBr
.0179 x .290 = .
The heat of combustion of liquid toluene (C7H8) is -3910.3 kJ/mol at 1 atm and 298 K.
a) What is the energy of combustion at 1 atm and 298 K?
thanks so much!-warrens class?
answer is -3905.4 kj/mol
