Chemistry

In the presence of H2 and Pt, ethylene is converted to ethane. H2C=CH2 + H2 (ethylene) >> CH3CH3 (ethane)

a. What is the theoretical yield of ethane (in moles) if 4.00 mol of ethylene are reacted with 2.00 mol of H2? Answer: 2 mol b. What is the theoretical yield if 50.0 g of ethylene are reacted with 25

What happens when iron nail reacts with copper sulphate

Will the mass of the beaker and its contents stay the same throughout the displacment reaction?-The reaction: Fe + CuSO4 -> FeSO4 + Cu Or easier: Fe + Cu 2+ -> Fe 2+ + Cu The concentration of SO4

The major product(s) arising from electrophilic substitution of acetophenone with Br2/AlBr3 in the presence of

a. o-bromoacetophenone AND p-bromoacetophenone b. m-bromoacetophenone c. p-bromoacetophenone d. o-bromoacetophenone e. none of the above I have no idea how to do this question. Please please hel

I need to know if this is a reverse osmosis system or not

I Have a Seagull IV X-1F Purifier with Faucet and i need to know if this is a reverse osmosis system because i really do not know what they really are, apart from they purify water likemy Seagull IV X

How do you estimate the pH of HNO3? What steps did your do to get to your answer

What do you mean , estimate?Do you mean how to find the pH?You require the concentration and volume of the solution

How did Scientists figure out how many electrons and atoms are in a given element

http://en.wikipedia.org/wiki/Atom#Origin_of_scientific_theory That site will explain the gist of it. The smallest mass of an element is an atom, which has electrons and neutrons inside it. People spen

Gold and the platinum group metals are found in nature in metallic form because

a. they are solids at room temperature b. they are highly reactive c. they are soluble in water d. they are relatively inert e. they are relatively abundant I got this corrosion qustion given to

Why do atoms want to bond together chemically

Because they have this wierd wish to have a full outer shell (it makes them stable)......so they either share electrons with another atom to bond covalently, so both atoms have full outer shells, or t

Which solution has a lower pH? 0.1 M NaOH or 0.1 M NH3? How did you calculate your answer

pH 0.1 M NaOH =13 pH 0.1 NH3=1 -log[OH]=pOH pOH+pH=14 pOH=1 pH=14-pOH pH=13 -log[H+]=pH -log[0.1]=1 pH=1

What is the electron ring formation for iron

Good Morning, Ali.Iron has the following electron structure: 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d6.Or, using shorthand it would be [Ar] 4s2, 3d6 as the Noble Gas Argon has the configuration of the first 5

Are these answers right? (Scientific Notation and Significant Figures)

Rewrite in scientific notation to three significant figures. (ans. means my answer) 1. 20.48 - ans. 2.04 x 10 2. 50, 492 - ans. 5.04 x 10 square. 3. 0.237 - ans. 2.37 x 10 negative 1 4. 15.0 x 10

Calculate the change in heat when 23.95 grams of water vapor (steam) at 100 degrees celsius condenses...

Calculate the change in heat when 23.95 grams of water vapor (steam) at 100 degrees celsius condenses to liquid water and then cools to 1.00 degrees celsius. =________ joules Thank you for any help y

Could you please help me

Hello there, Could you please help me answer this question? What is the empirical formula fir this compound which contains 38.36% Iron 12.33% Carbon 49.32% Oxygen ????? Apparently if you have a num

Help solving vanadium question!

Determine the value of n in the following half equation. VO2+ + ne- + 2H+ V3+ + H2O a. 2 b. 0 c. 5 d. 1 I just got this questionin an online exam at uni, I cant even remember doing this, please

Chemistry question! Can someone please help

For the following reaction, 3.26 grams of ethylene (C2H4) are mixed with excess hydrogen gas. The reaction yields 2.36 grams of ethane (C2H6). hydrogen (g) + ethylene (C2H4) (g) --> ethane (C2H6) (g)