Science & Mathematics - 13 October 2006

Its some research I need to do, Google's not much help.

2006-10-13 05:33:25 · 13 answers · asked by Chaos 2 in Biology

I has just been laying on my bed for 1 hour and couldnt get to sleep at all. then, i decided to get up and ask for your help !

2006-10-13 05:31:18 · 25 answers · asked by Anonymous in Medicine

Whatever it is, I have it.......

2006-10-13 05:30:34 · 7 answers · asked by Rosie 2 in Other - Science

well my wife thinks you cant? but im not so sure.

2006-10-13 05:30:03 · 26 answers · asked by pooonmywellies 2 in Other - Science

P-H
H-F
O-Br
Al-Cl
O-N

2006-10-13 05:29:17 · 1 answers · asked by obinna p 1 in Chemistry

what is it for?

2006-10-13 05:28:56 · 28 answers · asked by Pete 1 in Biology

Please only answer if you are SURE of it. I need to know the dangerous makeup when It is a gas.

2006-10-13 05:28:51 · 9 answers · asked by Angel Eve 6 in Chemistry

here are some equations im stuck at: are the following reactions redox?

1)2CuCl2(aq) + 4KI(aq) 2CuI(s) + I2(s) + 4KCl(aq)

2)2HNO3(aq) + CuO(s) Cu(NO3)2(aq) + H2O(l)

3)10HNO3(aq) + 4Zn(s) 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l)

4)2CrCl3(aq) + 3Na2C2O4(aq) Cr2(C2O4)3(aq) + 6NaCl(aq)

2006-10-13 05:28:02 · 1 answers · asked by joejoe 1 in Chemistry

A manager believes that the average sales volume per customer is distributed with a population mean of $100 and a standard deviation of $35. A sample of 50 customers resulted in a sample mean of $90. What is the probability of obtaining a sample with a sample mean smaller than $90?

2006-10-13 05:26:10 · 5 answers · asked by Anonymous in Mathematics

If not the brain; does it cause any harm if you watch your food through the glass being microwave-cooked?

2006-10-13 05:24:34 · 18 answers · asked by Anonymous in Physics

It's for a project in a Spanish 3-4 class that is worth 100 points. It is called "Dia de los Muertos."

2006-10-13 05:24:06 · 12 answers · asked by Anonymous in Geography

A is twice efficient than B. A and B can both work together to complete a work in 7 days. Then find in how many days, A alone can complete the work

2006-10-13 05:22:09 · 7 answers · asked by yamuna s 1 in Mathematics

Exact mass=24.9858, 25.9826, 23.9850.
Percentage abundance= 10.00, 11.01, 78.99
Calculate the atomic mass of magnesium.

2006-10-13 05:21:40 · 6 answers · asked by lamide e 1 in Chemistry

2006-10-13 05:19:01 · 1 answers · asked by suresh d 1 in Other - Science

Im making a "why I love chemistry" Poster for school for extra credit. It has to be about household safety and how chemistry plays into that. So I was wondering what kind of household safety you all think has alot to do with Chemistry. Thanks for your help, angie

2006-10-13 05:18:03 · 4 answers · asked by Angel Eve 6 in Chemistry

who asked this Q?
If there are so many galaxies and stars then why isn't it light all the time? why isn't the night side of the Earth lit up by this light?

2006-10-13 05:17:39 · 14 answers · asked by grace 1 in Astronomy & Space

This is a sea shell found in palk strait and gulf of mannar tropical seas situated inbetween india and sri lanka. For hindu and buddish people it is a holy and sacred sea shell. The commercial names of the shell are valampuri, dakshinavarthy conch, lakshmi conch. All sea shells are left turned (handed) but these type of shells are right turned (handed). All the hindu gods and goddesses will have this shell in one of their hands.

2006-10-13 05:14:27 · 4 answers · asked by yazhieximps 1 in Zoology

Would you be discriminate and choose an M.D. over a D.O because the D.O.'s are in the minority (or some other reason), even though there's no huge difference between the two types of doctors?

2006-10-13 05:14:13 · 6 answers · asked by yulia 1 in Medicine

A mixture contained zinc sulfide, ZnS, and lead sulfide, PbS. A sample of the mixture weighing 6.13 g was reacted with an excess of hydrochloric acid. The reactions are




ZnS(s) + 2HCl(aq) ==> ZnCl2(aq) + H2S(g)


PbS(s) + 2HCl(aq) ==> PbCl2(aq) + H2S(g)




If the sample reacted completely and produced 1.048 L of hydrogen sulfide, H2S, at 21C and 742 mmHg, what were the percentages of ZnS and PbS in the mixture. Enter the percentage for ZnS first, then PbS.

2006-10-13 05:13:51 · 3 answers · asked by thewhite_stag 1 in Chemistry

A mixture of Ne and Ar gases at 351 K contains twice as many moles of Ne as of Ar and has a total mass of 47.0 g. If the density of the mixture is 4.17 g/L, what is the partial pressure (in atm) of Ne?

2006-10-13 05:12:23 · 2 answers · asked by thewhite_stag 1 in Chemistry

...the world. it's for a project i have to do. thanks :-)

2006-10-13 05:06:29 · 9 answers · asked by Chocolate Lover♥ 7 in Earth Sciences & Geology

I've seen the moon look enormous in films etc (often behind a kissing couple!) but does this ever happen in "real life"? Does the moon look larger in certain countries/conditions/times of year?

2006-10-13 05:06:17 · 6 answers · asked by Anonymous in Astronomy & Space

Can coconuts migrate (by themselves) ?

Can a swallow carry a coconut ?

Can a swallow grip a coconut by its husk ?

Could a five ounce bird carry a one pound coconut ?

Does a swallow need to beat its wings forty-three times every second to maintain air-speed velocity ?

Could an African swallow carry a coconut ?

Could an European swallow carry a coconut ?

Is an an African swallow migratory ?

What is the air-speed velocity of an normal unladen swallow ?

What is the air-speed velocity of an unladen African swallow ?

What is the air-speed velocity of an unladen European swallow ?

Haha have fun there...and see if you can guess where i came up with these questions from.

2006-10-13 05:04:31 · 1 answers · asked by Spring is Awesome 1 in Other - Science

2006-10-13 05:03:55 · 4 answers · asked by shuja 1 in Biology

2006-10-13 05:03:53 · 1 answers · asked by ponderable 1 in Biology

2006-10-13 05:03:30 · 25 answers · asked by i wish bob was my uncle dont you 2 in Earth Sciences & Geology

The combustion method used to analyze for carbon and hydrogen can be adapted to give percentage N by collecting the nitrogen from combustion of the compound as N2. A sample of a compound weighing 8.66 mg gave 1.72 mL N2 at 24C and 748 mmHg. What is the percentage N in the compound?

2006-10-13 05:03:28 · 3 answers · asked by Anonymous in Chemistry

A steel bottle contains 11.1 L of a gas at 11.4 atm and 18C. What is the volume (in L) of gas at STP?

2006-10-13 05:02:18 · 1 answers · asked by Anonymous in Chemistry

2006-10-13 05:00:44 · 3 answers · asked by Nickname 3 in Chemistry

2006-10-13 05:00:24 · 7 answers · asked by Anonymous in Geography