chem

whats relationship between temp and kinetic energy http://www.google.com/search?as_q=temperature+kinetic+energy+&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&as_sitesearch=...

18 years ago

Which of the following subshells is correctly designated? a. 1f5 b. 3s3 c. 6f12 d. 4d11 e. 1p2

17 years ago

Does the element sodium have properties in common with NaCl? Explain

17 years ago

You need to produce a buffer solution that has a pH of 5.08. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The of ac...

16 years ago

Ammonia,is a weak base with a Ka value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?

16 years ago

I am reviewing my test and I having trouble figuring out the answer to the following question: List the following element symbols in order of decreasing exothermic electron affinity: Al, Ca, As _______>________>________ I wrote: Al>As>Ca (I got it wrong)...

15 years ago

Give the oxidation sate for the monoatomic cobalt species whose electron configuration is the following:[Ar]4s0 3d6 Is the answer +3? Thank you!

15 years ago

hi im doing a post lab sheet for chem class. and im having a little trouble. we did an experiment where we put a mixture into a bath and checked to see how long a color would leave from the mixture. i have temperature 12.6 C -> 285.6 K Time 816 sec but im...

15 years ago

hi im doing a post lab sheet for chem class. and im having a little trouble. i have: temperature 12.6 C -> 285.6 K Time 816 sec but im supposed to find 1/T(K) it looks like my classmate did this: 12.6 x 285.6 = 3598.56 however they gave me the response to...

14 years ago

im supposed to find the slope= -EA/R = triangle y/triangle x = (y2-y1) ________/(x2-x1)____________ how do i do this? is it the same as the slope that excel gave me? i have information from 3 different groups, and i have 3 x's and 3 y's, how do i solve th...

14 years ago

On complete oxidation, one mole of an organic compound produced four moles of water. Which one of the following substances could it be? CH4 C2H6 C3H7OH C4H10 So I added O2 to each of these compounds, but I must be doing something wrong because I can't get...

14 years ago

At a certain temperature, 2.00 moles of phosphorus(V) chloride, PCl5, was placed in a 1.0 L vessel and permitted to react as shown: PCl5 (g) <-> PCl3 (g) + Cl2(g) At equilibrium, the container held 0.40 PCl5. What is the numerical value of Kc for the syst...

14 years ago

An excess of aluminum metal is added to 200.0 mL of 0.025 M solution of CuCl2, reducing the Cu+2 ions to metallic Cu. If the temperature of the solution increases from 25.0 to 27.5 degrees celsius, what is the enthalpy of this reaction per mole of Cu form...

14 years ago

Calculate the volume of 0.200 M acetic acid and the volume of 0.100 M sodium acetate required to make 200.0 mL of a buffer solution with pH = 5.00. The Ka for acetic acid at 298 K is 2.00 x 10-5.

14 years ago

The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2 C10H18O2 + CH3CH2OH + H3O+ → C10H22O2

14 years ago

Suggest structures for C10H14O; C10H16; C10H18; C10H16O3; C10H16O2 ; C12H22O2 in the following reaction schema: The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2 C10H18O2 +...

14 years ago

How much energy (in kilojoules) is released when 21.0 of ethanol vapor at 94.5 is cooled to -19.0?

14 years ago

How to find the %(W/V) of 134mL of a 0.610 M solution of Mg(OH)2

13 years ago

An aqueous solution contains 0.445 M ethylamine (C2H5NH2). How many mL of 0.226 M hydrochloric acid would have to be added to 150 mL of this solution in order to prepare a buffer with a pH of 10.200

10 years ago

Zinc reacts with 18.0 mL of 6.00 M cold, aqueous sulfuric acid through single replacement. a. How much zinc sulfate is produced? Answer in units of g

10 years ago

20.0 L of methane (CH4) undergoes complete combustion at 0.961 atm and 20◦C. How much CO2 is formed? Answer in units of L.

10 years ago

Assume that 29.7 g of Al react with HCl according to the equation Al(s) + HCl(aq) −→ AlCl3(aq) + H2(g) at STP. How many moles of Al react? Remember to balance the equation first. Answer in units of mol. How many moles of H2 are produced? Answer in units o...

10 years ago

0.947 moles of NaC2H3O2 dissolved in 100 mL solution

10 years ago

How much pure calcium carbonate (100.09 g/mol) is required to produce 40.0 mL carbon dioxide gas according to the reaction used in this experiment? Your unknown will contain between 25-100% calcium carbonate. Answer to 3 significant figures. Do not includ...

9 years ago

Which one of the following complex ions has an optical isomer? a. [Zn(phen)2]2+ b. [Cu(CN)4]2– c. [Co(H2O)4en]2+ d. [Zn(NH3)2en]2+ e. [Ni(en)3]2+ how would i go about finding this answer? i don't need the answer give would prefer steps. thanks

9 years ago

titration of sodium hydroxide with tetraoxosulphate4 acid.

8 years ago

Why does a rechargable battery loss charge after every charge?

4 years ago

Use this of velocity vs. time for two objects to answer the question. A velocity versus time graph shows two lines sloping upward from the origin. The line with the higher slope is labeled, C, and the line with smaller slope is labeled, D. Which statement...

1 year ago

Ammonia,is a weak base with a Kb value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution?

16 years ago

sorry the 2nd question is the right one

16 years ago

ok thanks alot... the PartB asks for: What is the percent ionization of ammonia at this concentration?

16 years ago

thanx a tons =)

16 years ago

Thank you, I guess I got confused with Al and As :)

15 years ago

if im missing any information, please let me know. just simple steps would be really helpful!

15 years ago

he gave us an example of what the slope might be in class and it was -1.3x10^2 but my slop is completely different, was i supposed to do calculations? or just get the one from excel? what do i put in the 2 blanks?

14 years ago

C3H7OH right?

14 years ago

Thank you

14 years ago

Sarah, 4.70 is what you get when you do the -log (Ka)

14 years ago

cadaverine is AKA pentane-1,5-diamine

14 years ago

10.4 grams

10 years ago

[base] > [acid] so your pH should be larger than pka. check DrBob's answer :)

10 years ago

so, I guess the question is "m of AgCl produced"???

10 years ago

Determine the mass of 3.18 ×1023 atoms Cl.

9 years ago

im not to sure what phen and en are short for. but im thinking the answers maybe d) if zinc is bonded to 2 (NH3) and if en means the rest of atoms its bonded to are the same.??

9 years ago

Use the graph of velocity vs. time for an object to answer the question. An illustration shows the velocity versus time graph. The vertical axis of the graph is labeled negative at the bottom and positive at the top. A line parallel to the horizontal axis...

1 year ago

Use the equation for motion to answer the question. x=x0+v0t+12at2 An object has a starting position of 2 m, a starting velocity of 15 m/s, and is moving at a constant speed. Which option shows the final position of the object after 1 s? (1 point) Respons...

1 year ago

The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true about the object's motion?(1 point) Responses The velocity is constant and non-zero. The velocity is constant and non-zero. The acceleration is neg...

1 year ago

A object travels at constant negative acceleration. What does the graph of the object's velocity as a function of time look like?(1 point) Responses a straight line with positive slope a straight line with positive slope a curved line decreasing from left...

1 year ago