Science & Mathematics - 3 October 2007

and please show how you did it

2007-10-03 15:53:29 · 1 answers · asked by Anonymous in Mathematics

1. a type of chemical reaction in which one reactant is oxygen and one product is water, is called what?

2. an ion that's composed of only a single atom, is called what?

3. what is the only known polyatomic ion with a plus 1 charge?


if you could help me with any or all of these thanks you very much!

2007-10-03 15:50:09 · 1 answers · asked by Colin M 1 in Chemistry

Nitrogen dioxide has opposing roles in our world. It is essential in the industrial production of nitric acid, but is also a contributor to acid rain and photochemical smog. Calculate the volume of nitrogen dioxide produced at 717.3 torr and 22.4°C by the reaction of 8.65 cm3 copper (d = 8.96 g/cm3) with 219.6 mL nitric acid (d = 1.42 g/cm3, 68.0% HNO3 by mass):

Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

2007-10-03 15:46:30 · 1 answers · asked by Will P 1 in Chemistry

2007-10-03 15:46:03 · 20 answers · asked by Anonymous in Geography

Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.50-L metal bottle that contains air at 110K and 2.0 atm pressure is sealed off. If we inject 80.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), what is the pressure inside the bottle?

2007-10-03 15:44:06 · 1 answers · asked by Will P 1 in Chemistry

Electrolysis of MOLTEN barium iodide. What forms at the anode?

2007-10-03 15:42:35 · 1 answers · asked by Anonymous in Chemistry

Contribute to water weight???

2007-10-03 15:42:28 · 4 answers · asked by Poptart_fingers~!~ 2 in Chemistry

I'd like to see work to get me through this problem, if possible, the actual steps of proving it. Any help welcome, thanks!

2007-10-03 15:42:05 · 5 answers · asked by ash 2 in Mathematics

that passes through(-4,5) if its zeros are 2+ sqrt( 3) and 2- sqrt (3)

2007-10-03 15:41:05 · 1 answers · asked by inderjitvirk2001 2 in Mathematics

i just need its generic and brand names

2007-10-03 15:40:32 · 1 answers · asked by Anonymous in Medicine

With theories like a Wave structure for matter that can explain basic function of atoms, why do we not hear about them in school?

Why is there such a wide held belief that an ether does not exist and that everything is particle basis?

2007-10-03 15:39:56 · 4 answers · asked by Zaarix 2 in Physics

On a certain road map, 3 inches represents an actual distance of 10 miles. If two towns are 10 inces apart on the map, what is the approximate distance between the towns?

2007-10-03 15:38:58 · 7 answers · asked by Anonymous in Mathematics

the book keeps telling me to write in standard form the equation of the line.

and i just need to know the standard form formula
i think it has to do with ax+ something
help?

2007-10-03 15:38:57 · 11 answers · asked by foshizzle 1 in Mathematics

2. What is the volume of a cube that measure 1 cm?
3. How many hundredths are equak to 1 tenth?
4. A fish tank has a length of 5 feet and width of 4 ft, and aheight of 4 ft. Which measurement should you use to find the volume of the fish tank?
5. What is 0.47 written as a percent?
6. What is another way to write 24/8?
7. Chris scored the following on his math quizzes 90, 96, 84, 92, 78. What is Chris's mean sore?

2007-10-03 15:37:20 · 4 answers · asked by rosemariestewart64 1 in Mathematics

i need to find a joke about the metric system and im having the hardest time! help!

2007-10-03 15:36:54 · 2 answers · asked by Kyra :] 1 in Mathematics

just need a little review lol

2007-10-03 15:35:07 · 5 answers · asked by Israel A 1 in Mathematics

strange physics question.. lol

as a part of a larger problem i need to convert 6.0m/s into g's. and one g = 9.8m/s^2.

to be honest im not sure if its even possible lol if i had 6m/s^2 it would obviously be easy, but i just dont know about this one!

help!

2007-10-03 15:34:56 · 2 answers · asked by Anonymous in Physics

2007-10-03 15:34:15 · 3 answers · asked by Anonymous in Chemistry

the carrotops (^) representing exponents of course.

i remember doing it in algebra last year but i'm not sure how it's done. like doesn't a^0 equal 1?

if someone can tell me how to solve it (and not just give me the answer) it'll be greatly appreciated and i'll choose the first person to do that as the best answer rather than someone that just gives me the answer.

so, please help! thanks.

2007-10-03 15:33:05 · 4 answers · asked by Anonymous in Mathematics

Can someone please explain to me how i can find the answer ..thankss

2007-10-03 15:32:41 · 5 answers · asked by Anonymous in Chemistry

air,fuel,ignition source,oxygen,or nitrogen

2007-10-03 15:30:09 · 2 answers · asked by slick 1 in Chemistry

2007-10-03 15:29:50 · 4 answers · asked by Anonymous in Mathematics

A sample of benzene, c6h6 contains 3.0 * 10 to the power of 23 molecules of benzene. how many grams are in the sample?

2007-10-03 15:29:23 · 5 answers · asked by Anonymous in Chemistry

prove it to me that it equals to tanx

2007-10-03 15:26:31 · 6 answers · asked by Anonymous in Mathematics

Each of the two congruent sides of an isosceles triangle is 8 in. less than twice the base. THe perimeter of the triangle is 74 in. WHat is the lenght of the base?

2007-10-03 15:25:33 · 4 answers · asked by ExpertTechAnswers 2 in Mathematics

laws are made to be broken right

2007-10-03 15:24:54 · 7 answers · asked by dallas j 2 in Physics

Thank you in advance.

2007-10-03 15:24:38 · 8 answers · asked by WizFan16 2 in Mathematics

how can I tell something is basic or acidic just by looking at its formula

2007-10-03 15:23:22 · 1 answers · asked by raleighzia 1 in Chemistry

Mount Mitchell in North Carolina is the highest point east of the Mississippi in North America. Suppose you adn a friend go to Mt. Mitchell to hike one weekend. You both notice taht the trees on the west side of the mountain have no leaves. Given that acid deposition affects Mt.MItchell, list 3 types of wet acid deposition that may be involved and describe how wet acid deposition affects tree leaves adn roots?

2007-10-03 15:22:04 · 2 answers · asked by Tangoant 1 in Earth Sciences & Geology

they are so annoying. do we write to our congressman?

2007-10-03 15:20:21 · 3 answers · asked by pretzelman5000 2 in Earth Sciences & Geology