Chemistry - February 2007

2007-02-01 05:12:35 · 13 answers · asked by Anonymous

A house with a 15.3 × 103 ft2 floor area and 8.00 ft high ceilings is to be heated with propane. How many kilograms of propane would be needed to raise the temperature of the air inside the house from 59.0 oF to
72.0 oF ?. In this calculation your are ignoring the temperature of the walls etc.



The moloar specific heat of the air inside the house is 30.2 J mol −1 oC −1
The average density of air over this temperature range can be estimated to be 1.22 g/L.
The molar mass of air is 29.1 g/mol.
There are 28.317 liters in a cubic foot.
The molar heat of combustion of propane is −2220.047 kJ/mol

2007-02-01 05:06:54 · 2 answers · asked by sunyrob 1

Assume that 3.57 x 106 kJ are needed to heat a swimming pool. If this energy is derived from the combustion of liquid ethanol (CH3CH2OH) at standard conditions (25 oC and 1 atm) what volume in liters of ethanol must be burned?




The heat of combustion of ethanol is 1366.818 kJ/mol. The density of ethanol is 0.789 g/cm3

2007-02-01 05:06:19 · 1 answers · asked by sunyrob 1

2007-02-01 04:54:40 · 2 answers · asked by fred52041 1

Ketchup and chocolate syrup are examples of what I'm am thinking.

2007-02-01 04:42:17 · 4 answers · asked by greydoc6 7

2007-02-01 04:41:42 · 4 answers · asked by Jennifer N 1

2007-02-01 04:40:47 · 2 answers · asked by Jennifer N 1

2007-02-01 04:35:07 · 3 answers · asked by pupchow96 1

2007-02-01 04:30:18 · 2 answers · asked by Sarah W 1

I need to know this all ingredients... even hard to spell ones!

2007-02-01 04:14:11 · 4 answers · asked by torirowe 2

is the element mercury a metal, nonmetal,or a metalloid?
help i need to kno fastly for my project!!!!!!!!!!!!!!!!

2007-02-01 03:58:34 · 9 answers · asked by Neetu 1

2007-02-01 03:40:37 · 9 answers · asked by Anonymous

What is the electron geometry for PF 3- and PF 5- ? I know you can't show me but could you tell me the name of the shape it forms ex. linear, octahedral. THANK YOU!

2007-02-01 03:38:28 · 1 answers · asked by Tracey Lee ♥ 2

2007-02-01 03:34:41 · 5 answers · asked by Anonymous

2007-02-01 03:29:51 · 6 answers · asked by torirowe 2

Thanks.

2007-02-01 03:22:07 · 4 answers · asked by shomaliatimalla 3

I love chemistry and I'm very good at it, but the highschool in my town sucks big time so we're never allowed to do experiments in the lab and I was wondering if there's anything I could try for myself. I'm studyiing organic chemistry so I'd prefere something in that area.

2007-02-01 03:20:38 · 4 answers · asked by Lyla 3

in regular notation and in noble gas notation! :)

2007-02-01 02:50:23 · 4 answers · asked by Tracey Lee ♥ 2

It seems to me intuitively that if you were suffering from an acid burn the last thing you would want to do is pour more acid on it. However - there's a scene in the movie Fight Club where Ed Norton's character is suffering from an acid burn while being held down by Brad Pitt's character. Finally, Pitt reveals Norton of his suffering by pouring vinegar on the burn - and - almost instantly - the pain is relieved.

Similarly, in the HBO Series "Carnivale", there's a scene where a man purposely disfigures his face by submerging it in hydrochloric acid. After he's done (and screaming in pain of course) - you see him pour a bottle of vinegar on his face to stop the pain.

I can't believe that this tidbit would be in 2 different productions and not have some vaildity to it.

Can someone please explain if this is fact or fiction - and - if it's true that vinegar does relieve the pain from acid burns - why??

2007-02-01 02:24:33 · 7 answers · asked by captain2man 3

2007-02-01 02:21:02 · 3 answers · asked by Matthew M 1

i mean some tools such as water tap or electical socket included in term labratory furniture or not? is any refrence for this

2007-02-01 02:08:32 · 2 answers · asked by m-r g 1

What role do chloride ions have in the human body? This is a question for my pre-lab for chem class and we are supposed to do a internet search to find the answer, but I have searched and cant find the answer so I am hoping someone can help me here. Thanks.

2007-02-01 02:06:24 · 4 answers · asked by shomaliatimalla 3

2007-02-01 01:57:31 · 2 answers · asked by bea 2

2007-02-01 01:55:21 · 2 answers · asked by bea 2

Would a solid have to form?

2007-02-01 01:53:43 · 2 answers · asked by Toothie 2

2007-02-01 01:37:40 · 6 answers · asked by krishna m 1

2007-02-01 01:29:16 · 3 answers · asked by venki 1

2007-02-01 01:26:02 · 3 answers · asked by Donna 2

I need a answer today because this a project and i want this to be a great project

2007-02-01 00:55:06 · 2 answers · asked by Raquell J 1

2007-02-01 00:39:46 · 2 answers · asked by ranjan_kumar313 1