Chemistry - October 2007

Acetylene gas, C2H2, reacts with oxygen according to the following equation. If two moles of acetylene react completely with sufficient oxygen, how many grams of water are produced?



2C2H2 + 5O2 -------> 4CO2 + 2 H2O

2007-10-11 10:44:06 · 2 answers · asked by jessica j 1

please answer

2007-10-11 10:41:40 · 5 answers · asked by HaitianPrincess/mrsvickervan 2

Which of the following is true in an uncontrolled fission chain reaction?




a. a heavy nucleus is broken into smaller nuclei

b. more neutrons are produced than are consumed

c. both (a) and (b) are true

d. both (a) and (b) are false

2007-10-11 10:11:57 · 2 answers · asked by Anonymous

Which isotope of oxygen is most likely to be a β emitter?




a. 15O

b. 16O

c. 17O

d. 19O

2007-10-11 09:49:06 · 4 answers · asked by ee101202 1

2007-10-11 09:31:06 · 3 answers · asked by Anonymous

2007-10-11 08:54:02 · 2 answers · asked by xoxopink129 1

How many electrons are being transferred in the following redox reaction?
Cu(s) + ZnCl2(aq) --> Zn(s) + CuCl2(aq)

2007-10-11 08:50:20 · 4 answers · asked by Sky N. 1

please list your source so I know it's true

2007-10-11 08:41:26 · 6 answers · asked by Molly M 2

2007-10-11 08:13:31 · 3 answers · asked by Goodaz 1

1. Given a 10.00 g sample of Na2SO4 ∙ 10H2O, what weight of anhydrous sodium sulfate can be obtained after driving off the water?

2. Calculate the percentage, by weight of each of the elements (C,H) in cyclohexame. [---- we were not given the weights of these]

3. The molecular formula of cyclohexane, an organic solvent, is C6H12. Calculate the mass of a mole of material in grams.


Please show work. Any help is appreciated -- Thank you very much in advance!!

2007-10-11 08:12:45 · 2 answers · asked by Kate 1

2007-10-11 08:11:14 · 2 answers · asked by Goodaz 1

2007-10-11 08:10:14 · 1 answers · asked by Anonymous

2007-10-11 07:55:19 · 5 answers · asked by Anonymous

2007-10-11 07:46:26 · 3 answers · asked by david t 1

The Haber process is the principal method for fixing nitrogen (converting N2 to nitrogen compounds).
N2(g) + 3 H2(g) 2 NH3(g)

Assume that the reactant gases are completely converted to NH3(g) and that the gases behave ideally.

(a) What volume of NH3(g) can be produced from 257 L of H2(g) if the gases are measured at 315°C and 5.01 atm?

(b) What volume of NH3(g), measured at 25°C and 727 mmHg, can be produced from 257 L H2(g), measured at 315°C and 5.01 atm?

2007-10-11 06:47:10 · 2 answers · asked by toocool 1

2007-10-11 06:40:46 · 2 answers · asked by whisper2ya 2

2007-10-11 06:37:09 · 1 answers · asked by ggmal8 2

2007-10-11 06:34:30 · 3 answers · asked by ggmal8 2

2007-10-11 05:42:41 · 15 answers · asked by Anonymous

What is the heat of combustion of 1 mol of C4H10 in kJ/mol, if 1.041 g is burned and a calorimeter absorbs +51.0 kJ of heat?

qrxn= -q calorimeter =
-51.0 kJ --> -51.0 kJ/ 1.041 g C4H10 X 58.0 g C4H10/ 1 mol of C4H10 = -2841 kJ/mol C4H10

Everything make sense execept for the 58.0 grams. Where does it come from and how can I calculate it? Thank you!

2007-10-11 05:27:17 · 6 answers · asked by Jamie 3

2007-10-11 04:59:52 · 2 answers · asked by Sanghamitra 1

please help me i am studying chemistry in a different language that i had just studied for one year and now i am confused.

2007-10-11 04:27:59 · 9 answers · asked by Anonymous

My teacher asked us to calculate the energy for Red, Blue, and Purple. I'm not sure what to do. =/

2007-10-11 04:00:46 · 1 answers · asked by Vanessa1027 1

2007-10-11 03:56:01 · 5 answers · asked by Dave P 1

2007-10-11 03:27:55 · 2 answers · asked by farnoush m 1

2007-10-11 02:57:45 · 2 answers · asked by Anonymous

2007-10-11 02:44:20 · 2 answers · asked by Anonymous

i know that they're both insoluble in water...but that's all.

2007-10-11 02:43:35 · 1 answers · asked by Anonymous

2007-10-11 02:40:38 · 1 answers · asked by alanis118 1

When 36.3 L ammonia and 40.0 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present?
g
NH3(g) + O2(g) NO(g) + H2O(l) [unbalanced]

2007-10-11 01:44:08 · 1 answers · asked by jnester0289 1