Homework Help - February 2007

Burning fossil fuels leads to the formation of acid rain. Acid rain has collected in this lake. A helicopter is dropping calcium hydroxide into the lake.

Calcium hydroxide dissolves in water to form an alkaline solution.

(i) what effect does an alkali have on the pH of an acidic lake ?

(ii) When calcium hydroxide reacts with sulphuric acid in the lake a calcium salt is formed.

What is the name of this salt?

Calcium carbonate
Calcium nitrate
calcium chloride
calcium sulphate

2007-02-08 07:57:02 · 5 answers · asked by Anonymous

P=2L+2W
Where P is the perimeter of a rectangle with length L and width W. Find P if
L=16 km, W=7.5KM.

2007-02-08 07:54:26 · 12 answers · asked by Anonymous

I know it may not be possible, but there is a way...

2007-02-08 07:45:47 · 10 answers · asked by TheApocalypticOrgasm 6

this is for my adv. biology science eproject

2007-02-08 07:45:01 · 2 answers · asked by Courtney C 1

2007-02-08 07:30:59 · 3 answers · asked by Stacey T 1

2007-02-08 07:28:25 · 2 answers · asked by Anonymous

__________like those of he cranium or the scapula are sandwiches of spongy bone betweem two layers of compact bone. They are usually curved, so we can refer to an inncer and outer table with diploe between them.
A.flat bone
B.long bones
C.short bones
D.seasmoid bones

2007-02-08 07:27:49 · 5 answers · asked by cherryvalley2006 2

im doing a term paper on Stephen Crane's The Red Badge of Courage and i was wondering what online sources would be good for information, i have looked but found nothing really worthwhile. Also are there any good online databases that will help me tou, if so can you please give me the link? thank you.

2007-02-08 07:26:13 · 2 answers · asked by rebekah u 5

Because this is my stupid homework;(

2007-02-08 07:13:00 · 5 answers · asked by Anonymous

I have to give a speech for my Business Presentations class and I wanted to get an idea of roughly how much I need to type to hit the target of 3-4 minutes assuming I talk at a "normal" rate with no long pauses.

Example: 1.5 pages, double spaced, 12 point font?

2007-02-08 07:02:26 · 4 answers · asked by Dave H 2

i am doing a school project and he wants to know what will happen May and what will happen December 2009? help ME!

2007-02-08 07:01:18 · 11 answers · asked by Anonymous

This is the question in my daughter's RE Homework? How should she answer? She is in Year 7.

2007-02-08 06:59:09 · 7 answers · asked by Karen 3

pls can anyone send me any nice short stories with christian morals.......................... it's urgent pls pls

2007-02-08 06:55:41 · 3 answers · asked by jay t 2

The esophagus is the organ intowhich the swallowed food is pushed.
A,true
B.false

2007-02-08 06:52:00 · 5 answers · asked by ck_scorpio40 2

I have to do a science fair project for school. The experiment was what fabric insulates the best, wet and dry (wool was by far the best wet, and wool and polyester were about even dry). I have to put together a board for the fair, and i need an attention getting name. It should have something to do with hypothermia, because that's the kind of reason for this--people need to know what fabric to wear in cold weather so they won't die of hypothermia. Anyways, my mom thought of "Hypothermia: be prepared or die" and i thought of "How to not die from Hypothermia" which i guess sounds kind of unprofessional. So, long story short, please give me suggestions!

2007-02-08 06:50:58 · 5 answers · asked by cate 1

I need similarities from when they'd just settled.

2007-02-08 06:48:52 · 1 answers · asked by elynlovesyou 1

________the measure of a material elasticity, difined as the ratio of force to elongation.
A.viscoelastic
B.stiffness
C.elasticity
D.dynamic flexibility

2007-02-08 06:46:44 · 1 answers · asked by ck_scorpio40 2

math help

2007-02-08 06:46:12 · 4 answers · asked by katelynn b 1

Where might an audio book of 1984 online?

2007-02-08 06:40:26 · 1 answers · asked by danielle 2

it's part of a crossword-puzzle at school I can't find the answer. I still need two other words.
This word has 6 letters, the 3rd is an N and it ends with a D

2007-02-08 06:37:20 · 2 answers · asked by Elyndra 1

Ok so my friend needs help with some things I gave her some but she wants the big words. So does anyone know words she can do that have to deal with moms. Like her project is about her mom and she looks up to her and she is stuck on words to think of she has some but she wants some really good ones. Does anyone knows of words they would describe their mom with so I can tell her............thanks..........

2007-02-08 06:31:07 · 2 answers · asked by candi*cane 2

As I approached my car the alarm went off.

2007-02-08 06:29:11 · 20 answers · asked by Pamela M 1

i have found some jobs for my spider diagram sayin jobs which tourism created but i need some bad points in why they are tourist jobs?

2007-02-08 06:14:08 · 10 answers · asked by <3 skittles <3 2

Homework help!!!!!!!!!!!!!!!!!!!!!...
Okay look folks look i need lots of help!!!I have this project on the mayan stepped pyramids.Ive looked all ovr the place but nothin'.I need 2 know why were they made then and the HISTORICAL purpose please smart ppl help me!

2007-02-08 06:13:51 · 4 answers · asked by ricky 1

2007-02-08 06:04:46 · 2 answers · asked by K A 1

what jobs does tourism create and why? i am confused about it as i can't think! help? thanx

2007-02-08 06:01:10 · 12 answers · asked by <3 skittles <3 2

i am doing senegal for a class project, i need info on religion,economics, government, education, enviroment, and health/ desease. i need info on big problems/ events that happened. i need the websites too. and hurry so i will get it before class is out.

2007-02-08 05:47:32 · 3 answers · asked by rubygirl0714 1

I am doing a BIG project on Mamie Eisenhower for my history class and I was wondering if anyone had any interesting tid bits about her or if anyone could provide any helpful information. I would appreciate your help. Thanks. (My first paper is a biography and I have to "be her" at a fake cocktail party, so ANYTHING about her personality would be awesome to know!)

2007-02-08 05:39:46 · 3 answers · asked by juliefan 2

What can you say when your writing an essay about a backyard barbeque from a flie's point of veiw. can anyone add to this, The backyard Barbeque looked great to the fly in the air... it looked better far away then up close to the fly.....

2007-02-08 05:34:23 · 3 answers · asked by alwayz_n_trouble01 1

Okay please post on here if you are any good at geometry. Then I can e-mail you. Because they are doing a book census at my school, so I can't teach myself the sections I have missed due to sickness. PLEASE PLEASE PLEASE. Also, if you know any godd free tutoring websites for math, that would be awesome too. Please and Thank you.

2007-02-08 05:34:08 · 2 answers · asked by Anonymous