Chemistry - June 2007

like dose it recharge the batteire

2007-06-18 05:45:49 · 5 answers · asked by SANDY E 1

1. if heat is absorbed by a reaction, carried out in the calorimeter, will the heat of the calorimeter and contents be lost or gained?

2. if heat is evolved by a reaction, carried out in the calorimeter, will the heat of the calorimeter and contents be lost or gained

2007-06-18 05:22:18 · 2 answers · asked by Anonymous

2007-06-18 00:20:29 · 1 answers · asked by zerald 1

weird...since it contains carbon

2007-06-18 00:18:43 · 8 answers · asked by ziktles 3

Laboratory in schools.

2007-06-17 23:57:13 · 10 answers · asked by Jo Ronar Gleen B 1

2007-06-17 17:01:58 · 1 answers · asked by Anonymous

I have a take home test in the morning and I really need a good grade. I have 5 questions left that I'm just not sure about. Please help if you know how to do it. They are multiple choice.

Which volume unit is the largest?
kg/L/mm/kL/cm3

An order for a patient calls for 0.020 grams of medication. On hand are 4 mg tablets. What dose is needed for the patient?
2 tablets/8 tablets/4 tablets/10 tablets/5 tablets

A doctor orders 1500 mg of sulfa drug. Tablets in stock are 0.500 g. How many tablets are needed?
1
2 1/2
1 1/2
3
1/3

How many milimeters of a salt solution with a density of 1.8 g/mL are needed to provide 400 g of salt solution?
220 mL/400 mL/ 22 mL/ 4.5 mL/ 720 mL

2007-06-17 15:38:09 · 3 answers · asked by Charlies_Angel 1

(1) H-1 and He-3 (2) H-2 and He-4 (3) H-3 and He-3 (4) H-3 and He-4

the correct answer is (4) but how?

2007-06-17 14:50:45 · 3 answers · asked by Desilicious 1

what is the oxidation numbers for P and O in PO4 with a negitive charge of 3...and how did you get it

2007-06-17 11:58:04 · 4 answers · asked by Anonymous

why doesnt gas pressure depend on the type of gas?

2007-06-17 11:33:17 · 2 answers · asked by Anonymous

lol

2007-06-17 10:47:28 · 17 answers · asked by Anonymous

give examples

2007-06-17 10:07:01 · 2 answers · asked by Anonymous

Calculate the Molecular Formula of a compund whose composition is 55.8% Carbon, 11.6% Hydrogen, and 32.6% Oxygen.

2007-06-17 09:51:19 · 4 answers · asked by Anonymous

psychology, maths?

2007-06-17 09:45:45 · 4 answers · asked by Dudeberry 2

1. Organic compounds have only Cs and Hs rite?
2. How is fractional distillation used to seperate the components of crude oil? (what is it?)
3. classify reaction as refomring, cracking, or complete combustion then complete a possible chemical equation: C4H10 + O2 --> (given a line) (how to tell whether its complete or incomplete combustion if just given reactants?
4. Given the following structural diagrams. what are its names? (CH3)4C and (CH3)2CHCH(CH3)2 (<--no lines connecting Cs)
5. How do i know i have found all the isomers for C3H6 and C5H10...i drew 2 for each already...more?
6. Indicate which hydrocarbon familes (alkanes, alkenes, etc) have the following characteristcs: a) form geometric isomer b) form structural isomers c) undergo combustion reactions

THANK YOU SOO MUCH!!

2007-06-17 08:32:33 · 3 answers · asked by no name 1

can you easily make your own ceramic tile at home or do you need heavy machinery to make it?

2007-06-17 08:24:15 · 2 answers · asked by Anonymous

business class

2007-06-17 07:53:23 · 2 answers · asked by Anonymous

2007-06-17 06:21:21 · 3 answers · asked by Anonymous

2007-06-17 06:03:15 · 5 answers · asked by wonderwoman 1

2007-06-17 05:38:02 · 8 answers · asked by Anonymous

1) Hf, Hg, He
2) Cr, Cl2, C
3) Ba, Br2, B
4) Se, Sn, Sr

2007-06-17 05:23:28 · 4 answers · asked by Sapan S 1

2007-06-17 05:10:14 · 2 answers · asked by Anonymous

a. 30.4 g b. 50.4 c. 60.8 g d. 101g e. 201g

2007-06-17 03:01:32 · 2 answers · asked by Anonymous

2007-06-17 02:44:22 · 4 answers · asked by Anonymous

a) 0.50mg b)1.0mg c)2.0mg d)0.25mg e)4.0mg

2007-06-17 02:21:48 · 3 answers · asked by staylor8319 1

A 24.0-g sample of an unknown metal is heated to 94.0°C and is placed in a perfectly insulated container along with 196.g of water at an initial temperature of 20.15°C. After a short time the temperature of both the metal and water become equal at 23.80°C.
The specific Heat Capacity of water is 4.18 J/g/K in this temperature range.
What is the specific heat capacity of the metal?

Can anyone help me with this question?
Please provide me with solution
Thanks alot:))

2007-06-16 15:07:15 · 4 answers · asked by Anonymous

A. hydrogen
B. nitrogen
C. chlorine
D. oxygen
E. carbon

2007-06-16 14:19:00 · 9 answers · asked by wonderwoman 1

2007-06-16 13:50:16 · 6 answers · asked by cmyfoo 2

IS MAKING TEA A PHYSICAL CHANGE OR CHEMICAL?! (10 PTS TO ANS + BRIEF EXPLANATION)

2007-06-16 12:50:40 · 7 answers · asked by bob b 3

2007-06-16 12:46:12 · 6 answers · asked by edthegrunt 1