Chemistry - January 2007

i want some copper that doesn't soluble in HNO3

2007-01-20 15:24:09 · 2 answers · asked by Anonymous

H2O(l)+energy<->H2O(g)

2007-01-20 14:46:40 · 2 answers · asked by S 3

2007-01-20 14:36:11 · 1 answers · asked by Anonymous

A solution is prepared by mixing 88.0 mL of 5.00 M HCl and 32.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Each answer for [H]+, [OH]-, and pH are worth 1 point, therefore together are worth a total of 3 points

2007-01-20 14:24:30 · 3 answers · asked by Student_007 1

2007-01-20 14:20:36 · 17 answers · asked by Anonymous

Is there such a substance which can instantly freeze water if it is added due to an endothermic reaction? And is flash powder(Potassium Perchlorate with Aluminum powder) very unstable? Can you bring it with you in your pocket?I just need to know becuase I'm a magician and am trying to come up with new tricks.

2007-01-20 14:18:20 · 2 answers · asked by Sliceathroat 3

my son wants to put tin foil ball & the cleaner "the works" into a 2 liter pop bottle...shake it and throw it....what will happen...this will take place in 10 min. ????

2007-01-20 14:13:39 · 4 answers · asked by Ford Prefect 7

( placing in a known volume of water)

2007-01-20 14:11:38 · 5 answers · asked by Anonymous

I know about salt, sugar, sand, rubbing alcohol, and fire.. But I can't think of anymore, I'm using it for a science project but i could use help...

2007-01-20 13:52:44 · 8 answers · asked by Anonymous

2007-01-20 13:28:36 · 2 answers · asked by Anonymous

2007-01-20 13:20:20 · 11 answers · asked by Anonymous

What would have to be true about any solvent for one of its dilute solutions to have essentially the same molar and molal concentrations?
This question is driving me wild the possible answers are the following. I doubt it has anything to do with the solutes miscibility with water, it's polarity, or it's molar mass being similar to water. Any ideas?

It must be miscible with water.
The volume cannot change appreciably as solute is added.
It cannot be volatile.
The density must be very close to 1 g/mL.
It must be polar.
Its molar mass must be close to the molar mass of water.

2007-01-20 12:56:24 · 3 answers · asked by sn1per0nther00f 3

i was in the pub yesterday and i did a big loud faart, and people started laughing!!

2007-01-20 12:55:53 · 11 answers · asked by qwerty 3

2007-01-20 12:17:48 · 2 answers · asked by thinktank 2

is this double displacement reaction..?

CuOH2 +HCl=

2007-01-20 12:17:35 · 1 answers · asked by Anonymous

2007-01-20 12:11:21 · 6 answers · asked by Franz 2

In carbon dating, I learned that it breaks down half of its original isotope mass in a certain amount of years. If say, I started with 100g of c14, after that certain amount of years, i would have 50g at its half life, why is it, then, that it takes the same amount of time to break down the first 50g of c14 in its first half-life as it takes to break down the 25g in its second half-life?

2007-01-20 12:01:06 · 3 answers · asked by stevenzhang199 2

2007-01-20 11:53:16 · 4 answers · asked by bear 1

2007-01-20 11:47:04 · 1 answers · asked by Fang 1

2007-01-20 11:35:08 · 2 answers · asked by YuriLiciOuz 1

2007-01-20 11:19:03 · 2 answers · asked by Anonymous

Write a balanced chemical equation for the reaction between the sodium hydroxide and magnesium sulfate to form sodium sulfate and magnesium hydroxide.

2007-01-20 11:17:13 · 1 answers · asked by Ballerina 5

I have 2 questions for my Study Guide for Chemistry.

Is the Balanced Equation of Beryllium Carbonte + Sulfuric Acid:
BeCO2 + H2SO4 --> H2Co3 + BeSO4 ?

And how many atoms of carbon are present in 5.3 L of CO2?
5.3/22.4 = # Mols of CO2, but how do I figure out atoms (I know how to convert to molecules)?

2007-01-20 11:11:18 · 3 answers · asked by Just Me 2

2007-01-20 10:55:39 · 5 answers · asked by Anonymous

I understand how to do these problems, I'm just really bad at writing the equation for them. Here's the problem:
Calculate the volume in mL of a 1.420 M NaOH solution required to titrate the following solution: 25.00 mL of a 1.500 M H3PO4 solution.

I know once you get the equation you would multiply (25mL H3PO4) x 1L/1000mL x (1.5mol/1L) x (?mol NaOH/?mol H3PO4) x (1L/1.420 mol NaOH)

Thanks!

2007-01-20 10:39:53 · 1 answers · asked by countrygurl587 3

plz help, stuck on chemistry question.

2007-01-20 10:25:12 · 2 answers · asked by Anonymous

2007-01-20 10:08:09 · 5 answers · asked by Anonymous

2007-01-20 09:52:23 · 2 answers · asked by mikeyplocky 2

2007-01-20 09:51:37 · 5 answers · asked by ? 2

2007-01-20 09:42:36 · 1 answers · asked by mike.roan@btinternet.com 1