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Determine the mass of CO2 produced by burning enough carbon (in the form of charcoal) to produce 550 kJ of heat.

C(s) + O2 (g) = CO2 (g) delta H of rxn = -393.5 kJ

A 32.6 iron rod, initially at 21.9, is submerged into an unknown mass of water at 63.2, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.7.

whats the mass of water?

im 17. I take my birth control pill (microgestin fe) religiously, daily, at 10:30 pm. one day this month I took it 1 hour 15 mins late. boyfriend I have sex without condom, but he never cums inside me. for the past three days I've had cramps and diarrhea. (im hoping its bc of bad food i ate)

my period should come in 3 days when I start placebos, but Im anxious. I have a home pregnancy test that claims to work 6 days before missed period. please advise.

Boyfriend bought 600 dollar bracelet for 1st year anniversary/birthday.

He's not rich, so this was a huge gift for him to me. He also has anger issues.

It's been maybe three months since I've lost it.

He hasn't asked about it. For now I'm just pretending that I'm keeping it safe in my drawer so that i DON'T lose it (even though i don't actually have it).

BUT I now have enough money to buy the exact same bracelet.

Should I buy the same 600 dollar bracelet to replace it so that he will never know what happened?

We are both only 18, if that matters.

I need some really good arguments for why I do not want her to be there. I can't straight forwardly tell her I'm gonna be drinking and don't want her to see me drunk.

I'm spending the next two days on a road trip with her and plan to bring it up then. I'm a girl. if that matters. and I have a boyfriend. and I'm 17.

on monday i woke up with my eye a little swollen, but it went down within an hour. it doesn't really "itch."

on thursday i woke up with my eye swollen again... it didn't go down. I put ice on it, it helped a little. In the evening, I started getting itchy on my abdomen, lower part of my back, and my forearms. When I scratched all these little mosquito-like bumps popped up.

I put aloe vera on it to stop the itch and went to sleep.

i woke up today, friday, with my eye more swollen, but the rash gone and not itching. I am putting ice on my eye, and it helped more, but not as much as I would have hoped...

is this allergies? btw, i recently started using clindamycin on my upper back and chest for acne... i also used to be vegetarian but i stopped and ate tuna and some milk products yesterday...

I'm writing a book and if it ever became a movie I need a good looking 15 year old boy to play a role, but can't think of any. Everyone is old now.

I've got Graham phillips and david dorfman... any blondes?

Give me some mythological creatures that can easily be covered up by a human body, for example, vampires, mermaids. (don't use those)

If you don't know any real ones, do you have any ideas of human like creatures that you can make up in your mind and describe how they look/act?

this is a picture of me:

http://i148.photobucket.com/albums/s36/Bethy1_2007...

if you were to give me a name, what would it be?

What could be a name for the girl in the picture?

click link for picture. don't worry, theres no virus. just open it, its important that i get names.

http://98.136.86.48/us.f654.mail.yahoo.com/ya/secu...

Do you remember the oreo's that turned the milk blue?

Why did they stop selling?

Don't you miss them?

I know I do.

A car traveling 56.0 km/h is 22.8 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.22 s later.

(a) What was the car's constant deceleration just before impact (assume the car is traveling in the positive direction)?

____ m/s2

(b) How fast was the car traveling just before impact?

___ m/s

Okay well i'm planning on making out with this guy tomoro.. we've been closed kissing for like a week now and its geting boring. we both want to french but my tongue is 3 inches out of my mouth (i measured) and his is really small... i dont want to choke him but how do i train my tongue and how do i no wen its been to much tongue?

also, do any of the guys like anything special when french kissing?

I have to do a report on y we shouldnt have it so please giv me your opinions.