Chemistry - April 2007

How to convert mg/100ml. Please show me how to set this up in a conversion table. Here is the question itself. 1.70mg/100mL convert to mol/L. Thanks so much!

2007-04-07 13:59:02 · 3 answers · asked by Anonymous

How is mercury different than other metals?

Is salt an element? explain.

Why are there more elements now than there were century ago?

Why is table salt no poisonous?

A compund is formed when elements join through a _______?
2 of the 3 elements that make up ammonia also make up water. What is the third element______?

2007-04-07 13:44:44 · 4 answers · asked by Anonymous

Too much saturated or unsaturated fat in the diet is unhealthful. What is the difference in the composition of saturated fat and unsaturated fat?

2007-04-07 13:24:08 · 3 answers · asked by tigerman a 1

Rubbing alcohol is isopropyl alcohol. How does this differ from propyl alcohol?

2007-04-07 13:23:42 · 2 answers · asked by tigerman a 1

glucose and starch?

2007-04-07 13:02:28 · 3 answers · asked by Roy P 1

could anyone(who knows a lot about chemistry) tell me if my answer for this question is correct

Explain why coenzymes can be reused by the body.

Answer: Minerals and coenzymes enable enzymes to work. They are not destroyed in biochemical reactions, which is why we only need small amounts of them. So, like enzymes, coenzymes can be used over and over again.

2007-04-07 12:42:53 · 2 answers · asked by Roy P 1

2007-04-07 12:14:43 · 2 answers · asked by HT 2

when methane (CH4) gas is burned in the presence of oxygen, the following chemical reaction occurs.

CH4 + 2 O2 -----> CO2 + 2 H2O

If 1 mole of methane reacts with 2 moles of oxygen, then

a) 6.02 x 10 ^23 molecules of CO2 and 6.02 x 10 ^23 molecules of H2O are produced
b) 1.2 x 10 ^24 molecules of CO2 and 1.2 x 10 ^24 molecules of H2O are produced
c) 6.02 x 10 ^24 molecules of CO2 and 1.2 x 10 ^24 molecules of H20 are produced
d) 1.2 x 10 ^24 molecules of CO2 and 6.02 x 10 ^23 molecules of H2O are produced

please explain

2007-04-07 11:21:53 · 5 answers · asked by Anonymous

2007-04-07 11:16:52 · 2 answers · asked by Meno 1

a) 5.16 x 10 ^30
b) 3.01 x 10 ^23
c) 1.20 x 10 ^24
d) 1.10 x 10 ^28

explain please

2007-04-07 11:16:43 · 4 answers · asked by Anonymous

which of the following is a balanced equation for the combustion of ethanol (CH3CH2OH)?

a) CH2CH2OH + 3 02 ----> CO2 + 2 H2O
b) CH2CH2OH + 3 O2 -----> 2 CO2 + 3 H2O
c) CH2CH2OH + O2 -------> 2 CO2 + 3 HO
d) CH2CH2OH + 2 O2 -----> 3 CO2 + 2 H2O

explain please

2007-04-07 11:14:32 · 1 answers · asked by Anonymous

a) they become slippery when reacting with water
b) they react with metals to release hydrogen gas
c) they produce salts when mixed with other acids
d) they become more acidic when mixed with a base

explain please

2007-04-07 11:10:28 · 4 answers · asked by Anonymous

HCN HCO HNNH
H

2007-04-07 10:59:37 · 2 answers · asked by discokid2k 1

Under which of the following sets of conditions will a 0.50 mole sample of hellium occupy a volume of 11.2 liters?

a)298 K and 0.90 atm
b) 273 K and 1.10 atm
c) 373 K and 0.50 atm
d) 273 K and 1.0 atm

explain please

2007-04-07 10:55:48 · 1 answers · asked by Anonymous

2007-04-07 10:50:07 · 1 answers · asked by Nicky 1

If you combine 75.0 mL of 0.350 M of HCl and an excess of Na2CO3, what mass of CO2 in grams should be produced? The balanced equation is given:
Na2CO3 + 2HCl => 2NaCl + H2O + CO2

2007-04-07 10:05:08 · 2 answers · asked by diamond 3

Hint: What would be the major side products formed in this reaction?

2007-04-07 08:28:05 · 2 answers · asked by kelxcore09 1

The methylbenzene formed is more reactive than the original benzene, and so the reaction doesn't stop there. You get further methyl groups substituted around the ring - polysubstitution. How can you accomplish monoalkylation in one step?

2007-04-07 08:23:37 · 2 answers · asked by arkanion 1

Fe(NO_3)_3+LiOH = LiNO_3+Fe(OH)_3
_means that it is subscript
can you balance for me. oh and what kind of reaction is it (single/double replacement, synthesis, decomp.)

2007-04-07 08:15:13 · 4 answers · asked by Anonymous

Write and Balance the chemical equation for nitrogen gas reacting with hydrogen gas to produce ammonia, NHS3. IF 323 mL of hydrogen is used int eh reaction, how many grams of ammounia are produced at STP?

Appreciate the help -

Thanks!

2007-04-07 08:07:38 · 1 answers · asked by a_chamarthy 2

theres a very old & rusty car in the back of our property that we would like to get rid of, what chemical can break down metal?
also, other suggestions of how we might be able to get rid of it. (its basically just the body of the car) thank you.

2007-04-07 07:35:57 · 3 answers · asked by cupcake 2

2007-04-07 07:12:12 · 3 answers · asked by Didi 1

2007-04-07 07:11:35 · 1 answers · asked by Didi 1

2007-04-07 07:09:39 · 14 answers · asked by Didi 1

thank you! 10 points! :)

2007-04-07 07:06:32 · 2 answers · asked by Tracey Lee ♥ 2

2007-04-07 07:06:26 · 1 answers · asked by Didi 1

of KCl in water

2007-04-07 07:04:35 · 2 answers · asked by JULIO C 1

Please explain, show work help
I got 3Al(s) + 3NH4ClO4(s) -> Al2O3(s) + AlCl3(s) + 3NO(g) + 6H2O(g)

So 3NH4ClO4:AlCl3

So 3:1 ratio
1650g:X
1650/3 gives you 550 grams

I got this wrong and want to know what I did wrong, thanks

2007-04-07 06:54:28 · 2 answers · asked by Laelaface 2

What makes a red solution, like cherry koolaid, appear red to your eye? What colors of light are absorbed and what colors are trasmitted?

2007-04-07 06:53:24 · 3 answers · asked by nikki 1

2007-04-07 06:48:38 · 1 answers · asked by nikki 1