Science & Mathematics - 28 December 2006

How much heat will be released if 6.0 grams of carbon reacts with excess oxygen according to teh equation below
C(s)+O2(g)-->CO2(g) enthalpy change is -34 kilojoules
would you times 6 g of C by (1 mol of C/12 g C)= ______ mol C

_____ mol C times (-190 kJ/1 mol C)= ______kJ
is that right, if it isn't could you correct me

2006-12-28 06:12:57 · 3 answers · asked by silentcargo 3 in Chemistry

2006-12-28 06:07:51 · 23 answers · asked by Humpy 3 in Astronomy & Space

NH3-->NO3- ---> NO2- ----> NH3

2006-12-28 06:07:00 · 4 answers · asked by cetinnovations 1 in Chemistry

If no one knows can you please direct me to a site that would.

2006-12-28 06:01:57 · 7 answers · asked by Anonymous in Biology

2006-12-28 05:59:19 · 6 answers · asked by Moll 3 in Other - Science

2006-12-28 05:58:10 · 18 answers · asked by Anonymous in Mathematics

i have two that i'm not sure on... Russia and Canada. any thoughts?

2006-12-28 05:52:00 · 21 answers · asked by Franny G 1 in Geography

ok i like chemistry but im still bad at it because of a teacher who expects us to know the basics and teaches at an way too advanced level.
now the test is on bonding and i really cant draw the stuff like VSEPR theory and i hope i wrotte the acronym right
like lewis dot i never know if i've got it right and expecially drawing all the bonds.....can anyone explain to me in english so that a dumb person can understand how to draw this stuff and other things is shuld know related to bonding? i don't know this is the first thing thats so hard for me. i feel stupid already so if you're gonna stop by to make me feel even more stupid then dont...only if you have knowledge about chem that you are willing to share in an understandable manner

thanks in advance.

2006-12-28 05:47:08 · 3 answers · asked by Anonymous in Chemistry

I emailed the author of lightandmatter.com regarding his textbook Simple Nature. This is an excerpt of my email

""I have an objection to your statement on page 38 bottom paragraph. In reference to the kinetic energy theorom, KE=1/2mv^2 , you state that "what about the factor of 1/2 in front? It comes out to exactly 1/2 by the design of the metric system."

That statement is not accurate since the Kinetic energy equation is fundamentally idependent of the unit system used. Whether we were to use the old english system, the metric system, or any other system the 1/2 would still be required for the equation to hold. I believe you meant that if you were to covert the old English sysetm to the metric system the factor that you stated is required.""

He replied by stating that 1/2 was indeed arbitrary.

Now I know He is 100X smarter than me so if any of you hit his page and read his section of the book tell me What am I getting wrong. Difference of semanantics?What am I missing?

2006-12-28 05:46:29 · 7 answers · asked by David H 1 in Physics

2006-12-28 05:46:21 · 16 answers · asked by Merisa Smith 1 in Mathematics

Hennepin and Hopper Lakes has seeps running into it. How is that different from a creek? I assume all creeks "seep" into something.

2006-12-28 05:39:19 · 2 answers · asked by Anonymous in Earth Sciences & Geology

If the sum of a number of parameters (x) equals (y).
What is the equation that provides me with the number of combinations of values for each parameter of x?

e.g. x = 2 and y = 10
So we have 2 parameters that when added together give 10.
How many sets of numbers are valid for this?
The answer here is 11 - but what is a generic equation?
(0,10; 1,9; 2,8; 3,7; 4,6; 5,5; 6,4; 7,3; 8,2; 9,1; 10,0)

2006-12-28 05:38:23 · 2 answers · asked by katy k 1 in Mathematics

2006-12-28 05:36:40 · 7 answers · asked by Lily 1 in Weather

I need the answer immediately!!!!

2006-12-28 05:32:24 · 8 answers · asked by HN 3 in Mathematics

2006-12-28 05:31:36 · 19 answers · asked by Meeeee! 5 in Medicine

A fishing boat is lying in the harbour. There is a rope ladder hanging over the side with its end touching the water. The rungs of the ladder are 1 metre apart and the tide is rising at 50 centimetres an hour.

At the end of 6 hours, how many of the rungs will be covered?

2006-12-28 05:30:35 · 6 answers · asked by Doctor Gonzo 2 in Mathematics

2006-12-28 05:27:39 · 5 answers · asked by jmseymour1 2 in Engineering

Sharon is taking part in a dolphin watch on the coast, she stands on the top of a cliff of height 30m. Her height to her eye level is 1.6 m. She observes a dolphin at an angle of depression of 30 degrees.
She wishes to know the distance of the dolphin from the base of the cliff?

2006-12-28 05:26:06 · 8 answers · asked by helen y 1 in Mathematics

2006-12-28 05:24:00 · 2 answers · asked by Lala 3 in Mathematics

This question is geared more toward those who have an understanding or strong interest in theoretical physics, ie. atomic, subatomic, particle.

2006-12-28 05:23:41 · 5 answers · asked by Anonymous in Physics

drill size and pitch dia

2006-12-28 05:23:00 · 4 answers · asked by uthaya k 1 in Engineering

My fiance and I are ttc. my period was supposed to start on the 24th but so far nothing. I ovulated on the 10th and we had unprotected sex on the 9th. I have noticed that my nipples are darker than normal and the skin around them has little bumps on them. I have been more tired than normal as well. I took an HPT last night and this morning and both were negative. what could be going on?

2006-12-28 05:22:06 · 3 answers · asked by half angel half Devil 1 in Medicine

I was ousite, it was a beautiful night and i was looking at the stars. Suddenly i saw in the sky like a perfect triagle shape, black (the sky is dark dark blue at night, but not black)and moving very slowly. If I called someone to see it, i was afraid of missing it, so i decided to keep on watching. No noise at all, no lights. From where I was, it had the size of walnut (triangular) I can tell it was not that far from the ground. When it was passing above me, from the ground I could see three circules inside the triangular base that were lighter than black. I saw it for 30 seconds approximately, moving slowly. What do you think it was? I dont think it was an UFO but I have tried to search on the internet for some plane with those characteristics and i couldnt find any. It was like 8 years ago.

2006-12-28 05:22:04 · 7 answers · asked by Anonymous in Astronomy & Space

2006-12-28 05:20:57 · 13 answers · asked by Rachel T. 2 in Weather

If scientists now think that 10% is incorrect then what is the amount?

2006-12-28 05:19:24 · 10 answers · asked by Jasmine 5 in Biology

Why doesn't it return to the way it looked before after it is dry?
Is there any way to fix it?

2006-12-28 05:18:18 · 5 answers · asked by meilin h 3 in Other - Science

Can parasites in humans be passed down through a family(genes/DNA)?

2006-12-28 05:16:55 · 10 answers · asked by Anonymous in Biology

if you were to overdose on a medication and go to the hospital they would start a charcoal filter to get the impurities out of your system, the medication CHASER the cure for hangover is the same it is a charcoal filter beer,cheap liquer have impurities in it so it filter them out the question is would chaser eliminate toxins in the body if taken a few days and a couple of doses

2006-12-28 05:15:46 · 2 answers · asked by 1FASTGTP 1 in Medicine

A. there is more rain in the summer.
B. the winds are calmer in the summer.
C. the water is saltier in the summer.
D. the water is warmer in the summer.

2006-12-28 05:14:33 · 4 answers · asked by Lily 1 in Weather

My chemistry class assigned a report for a chemical element - what's a good one?

2006-12-28 05:12:30 · 11 answers · asked by daftholiday 1 in Chemistry