Science & Mathematics - 1 January 2007

1. zinc and lead (II) nitrate react to form zinc nitrate and lead

2. aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas

3. potassium metal and chlorine gas combine to form potassium chloride.

4. calcium hydroxide and phosphoric acid react to form calcium phosphate and water.

**for number 1 i started out as Zn + Pb (NO3)2 > Zn(NO3)2 + Pb
did i at least start it off right??

2007-01-01 08:14:59 · 4 answers · asked by Anonymous in Chemistry

2007-01-01 08:13:57 · 3 answers · asked by Anonymous in Chemistry

Water will boil at 22 degrees Celsius if the pressure on the surface of the water is:

Why is the answer: 19.8 mmHg?

2007-01-01 08:09:38 · 1 answers · asked by Anonymous in Chemistry

we have to perform an egg drop project for physics in school right now. the requirements are NO balloons or parachutes of any kind, no stuffed animals, towels, or balls. it will be dropped from appx. 20-30 feet from the ground. it can't be bigger than 18" by 24" and no taller than 30" and can't weigh more than 7 lbs. we will only have one minute to insert the store boughten egg (provided by the professor). the contraption will be thrown or tossed however the professor would like to toss it. i have tried many things and would like some suggestions. please no funny comments or remarks, and please don't waste my time. thank you.

2007-01-01 08:08:31 · 7 answers · asked by Emily C 1 in Physics

do ya kno??

2007-01-01 08:07:37 · 7 answers · asked by <@>:**MIrAndA**:><@ 1 in Chemistry

it's a 5th grade ath prob but i can;t seem to figure it out. please help me!!!

you can only use four 8s and can use fractions and decimals.... as long as you get 24 as the answer... i need the answer fast!!!

2007-01-01 08:06:57 · 13 answers · asked by monk 2 in Mathematics

2007-01-01 08:05:14 · 5 answers · asked by Anonymous in Astronomy & Space

How can i find weather history for my specific area for free online? i;m trying to find out the snowfall total for March 7-8 1998 in kansas city... i am having no luck! any ideas?

2007-01-01 08:04:38 · 7 answers · asked by Anonymous in Weather

2007-01-01 08:03:21 · 10 answers · asked by jset1989 2 in Physics

Math symbols do not show on here, so here is a picture of the equation.

http://img292.imageshack.us/img292/6113/d61544dcef8652d7857bff7ga0.png

a) it is always equal to zero
b) it is always a negative number
c) it is always a positive number
d) it is too difficult to work with
e) none of the above.

2007-01-01 07:55:53 · 3 answers · asked by Anonymous in Mathematics

I used to play outside all day in the sun and loved it. My kids totally cannot hang and they always complain, "It's too hot out". whaddya think?

2007-01-01 07:52:42 · 4 answers · asked by Emerald Jones 5 in Weather

2007-01-01 07:52:03 · 7 answers · asked by Sweet Banana 1 in Physics

we were watching an advert which claimed that there were more bacteria on chopping boards than toilet seats but i thought it's more to do with the type of bacteria rather than the amount. We weren't sure if any can be transmitted through the smell of something, as surely if you can smell it, a particle containing the scent has managed to reach your nostrils.

2007-01-01 07:51:44 · 14 answers · asked by ebayphonehome 2 in Medicine

2007-01-01 07:50:34 · 2 answers · asked by Anonymous in Chemistry

what safety issues are assosiated with sepperating hydrogen?

2007-01-01 07:49:53 · 1 answers · asked by Hollister7 1 in Physics

what are the challenges of producing hydrogen in large amouts?

2007-01-01 07:48:09 · 4 answers · asked by Hollister7 1 in Physics

I'm doing a science project and i have to have to have at least some research.

2007-01-01 07:48:05 · 4 answers · asked by aracelly 2 in Botany

2007-01-01 07:47:52 · 1 answers · asked by OPEYEMI B 2 in Physics

if someone is 1m40 tall what does that mean in feet and inches?

2007-01-01 07:46:09 · 5 answers · asked by Anonymous in Other - Science

2007-01-01 07:42:38 · 23 answers · asked by invisible.wings 1 in Astronomy & Space

2007-01-01 07:41:05 · 11 answers · asked by i luv strawberries!! 2 in Chemistry

2007-01-01 07:40:24 · 9 answers · asked by Anonymous in Physics

2007-01-01 07:39:55 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Teams should present all relevant math applications that came into play in the process of solving the problem?

2007-01-01 07:38:37 · 1 answers · asked by Anonymous in Mathematics

3= y/242+31/11
wots Y and how do i work it out????

2007-01-01 07:37:45 · 15 answers · asked by Anonymous in Mathematics

Don't say crap about, "Where did it come from?" or, "How could it be so complex without God?" or, "Why are there still monkeys?" (Irrelevent to evolution, not a scientific argument, because we evolved from a common simian ancestor)

As far as I know the only real flaw is that we don't have the perfectly fossilized remains of every creature that ever lived, stacked in perfect order with neat labels on them.

Cite your sources and I won't accept religious ones.

2007-01-01 07:35:33 · 12 answers · asked by Anonymous in Biology

How do ice machines produce completely clear ice.
From the freezer ice is always unclear.

2007-01-01 07:34:21 · 7 answers · asked by psychodad 3 in Engineering

On the path she is on, she comes up to a rope bridge with a sign saying that the rope bridge can hold a maximum weight of 130 pounds, and that if any more weight is placed on the bridge it will collapse.

The girl knows her weight is 100 pounds, so she walks across the bridge carrying both gold bars, and the bridge does not break. How is this possible?

2007-01-01 07:33:15 · 13 answers · asked by john h 7 in Mathematics

Are there any links between metabolism and sleep? I heard a friend say that a person with low metabolism requires more sleep, and that it is harder to wake up for people with low metabolism than high metabolism. Is there any truth to this statement?

2007-01-01 07:32:37 · 5 answers · asked by Anonymous in Biology

2007-01-01 07:30:18 · 4 answers · asked by linda w 1 in Mathematics