Chemistry

Calculate the number of moles of Hydrogen in 0.15mol of CH4

please answer with explanations, i dont want a whole bunchof random numbers :( any answer is fine, ill reward with the best explanations. I think the answer is: Theres 4 H so 4 x 0.15 = 0.6 0.15 x 0

What is the Electron Configuration of Chromium

Cr: 1s2 2s2 2p6 3s2 3p6 4s2 3d4-Hi, Issac.The electron configuration of Chromium can be written using two different methods, one would be list each orbital, and the electrons in it, placing them in th

What are several elements abbreviated in U.S states

I need several states that are in the periodic table. I need the element, symbol, and the state it represents? thanks a lot ill get u points in return-Well, V thats an interesting question.I never tho

Amino Acid Analysis Question

It states that an oligopeptide has five distinct peaks, so shouldnt there be 4 amino acids + 1 that is either NH4+, N or Q? The answer is HKRPW ...but here there are five amino acids, and I thought t

Am i right about these soluable and insoluable problems

lead (ll) sulfide - insoluable calcium carbonate - insoluable silver nitrate - soluble sodium hydroxide - soluble lithium phosphate - soluble mercury (ll) iodide - insoluble-I looked up lithium phosph

Classify the following as an endothermic or exothermic reaction:

the temperature of two separate solutions is found to be 20 Celsius.when the solutions are mixed,a precipitate forms and the temperature changes to 18 Celsius. explain your reasoning.-neither heat is

Questions about Entropy changes.

In chemistry we recently did a lab session involving the reduction of ferricyanide to ferrocyanide. The change in entropy for this was calculated to be -151.0102452 J/mol. There are 2 question in my l

Help please with chemistry

help pleaseee http://img580.imageshack.us/img580/525/img0840ln.jpg-the set up for your problem suggests that they want it solved using average bond enthalpies which uses data like from http://www.scie

Chemistry Question Help GR9

You have some Copper(II) Sulphate in a test tube and some Sodium Hydroxide in another test tube. Then you mix them both. Answer the following questions 1) What 2 products do you get? 2) Provide a bal

Help with writing this chemical equation? (reaction is neutralization of antacid with hydrochloric acid)

(this is gr. 10 level by the way) Okay, the antacid is Rolaids, it contains Calcium Carbonate, Magnesium hydroxide and simethicone. How would I write this? and would simethicone be part of the equa

Whats the Atomic Symbol for the following element

Z= 7,Number of Neutrons = 15 (explain answer thanks)-Z = 7 means 7 protons, so the element is Nitrogen, N. Since they list the number of neutrons you might be looking for 22N the name of the particu

Do you know the title of this book? (please answer, this question really IS connected with chemistry)

My question may be a little bit extraordinary. I have a pdf document containing 200 spectroscopic problems, unfortunately, with no answers. Ive been considering buying the full version of this book,

Need help I really don't understand this Chemistry!!!!!!!!!

Calculate the standard reaction enthalpy for the reaction. CH4(g) + H2O(g) = CO(g) + 3H2(g) given 2H2(g) + CO(g) = CH3OH(l) delta H degrees = −128.3 kJ · mol−1 2CH4(g) + O2(g) = 2CH3OH(l) delta H de

Reaction of ethanoic acid and sodium carbonate

Heres what I got so far: CH3COOH + Na2CO3 ---> H2O + CO2 + Ive got no idea how to balance this equation, help please! :D-How about: 2CH3COOH + Na2CO3 = 2CH3COONa + H2O + CO2

Can I make a firecracker out of matches and sparklers

Ok Id like to make something that either looks cool or makes a loud noise. Any other fire cracker ideas that wouldnt be hard to make would be appreciated. Also could you make one with cap gun caps?-ye