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how do I find the ÄH for C2H4 + O3 --> CH3CHO + O2?
4 answers
asked by
mel
817 views
Commerical hydrochloric acid is 37% by mass HCl and has a solution density of 1.18g/mL. What minimum volume of hydrocloric acid
2 answers
asked by
Anonymous
568 views
I had to go and do a oxidation- reduction lab where:
I went oxidized borneol with sodium chloride and added 0.360g racemic
7 answers
asked by
~christina~
1,302 views
One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of
7 answers
asked by
mel
4,390 views
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is
2 answers
asked by
mel
842 views
On Easter Sunday, April 23, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized
2 answers
asked by
mel
2,233 views
2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g)
(a) Calculate H° for this reaction. kJ
4 answers
asked by
mel
1,482 views
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is
3 answers
asked by
mel
932 views
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted,
3 answers
asked by
mel
3,457 views
how many resonance structures can be drawn for sulfur trioxide, SO_3?
3 answers
asked by
edna
684 views
how many resonance structures can be drawn for sulfur trioxide, SO_3?
1 answer
asked by
edna
436 views
Consider the following reaction.
2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) H = -118 kJ Calculate the heat when 112.4 mL of
3 answers
asked by
mel
814 views
2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l)
H = -118 kJ Calculate the heat when 112.4 mL of 0.500 M HCl is mixed with 300.0 mL
10 answers
asked by
mel
1,135 views
You are given the following data.
P4(s) + 6 Cl2(g) 4 PCl3(g) H = -1225.6 kJ P4(s) + 5 O2(g) P4O10(s) H = -2967.3 kJ PCl3(g) +
7 answers
asked by
mel
3,647 views
Consider the following cyclic process carried out in two steps on a gas.
Step 1: 48 J of heat is added to the gas, and 20. J of
2 answers
asked by
mel
752 views
Yesterday, Jason had a sample of helium indoors (T = 23oC) in a sealed container, with a pressure of 760 mm Hg. He got bored and
2 answers
asked by
Tom
806 views
Suppose that Quebec had managed to succeed from Canada and became an independent country. Just to be difficult, they decreed
4 answers
asked by
Matt
964 views
A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250
3 answers
asked by
Matt
999 views
A balloon is filled with He to a pressure of 1.06 atm. The volume of the balloon at 25oC is 1.30 x 104 L. How many cylinders of
2 answers
asked by
Corey
561 views
if S8 has a partial pressure of .25 atm an decomposes to 4S2, is it the same partial pressure?
(In case this is relevant, temp is
3 answers
asked by
kitty
441 views
K= 6.9x10^10 which way does this dominate to right or left? for equilibrium constant? this is a hw problem i just don't
3 answers
asked by
alicia
419 views
answer the following questions assuming that m (subscript s) could have three values rather than two and the rules for n, l and
4 answers
asked by
mel
849 views
calculate the change in energy expected for each of the following processes
1. Rb(g) + Br(g) --> Rb+ (g) + Br- (g) 2. Mg(g) +
2 answers
asked by
mel
1,151 views
what is the energy of a mole of UV photons having a wavelength of 13nm?
1 answer
asked by
mel
416 views
can you help me with the following question please...
what alternative metals can be considered for platinum? I think it means
3 answers
asked by
Jake s
483 views
which metal has sililar properties (chemical/physical) to platinum metal?
1 answer
asked by
Jake s
365 views
i need to convert the following number of atoms into grams
d. 1 million atoms of Br bromine e. 3x10^23 atoms of Ne neon
2 answers
asked by
hope
654 views
what are the crystalline shapes of sucrose, sodium thiocyanate, and aluminum pottasium dulfate dodecahydrate??
3 answers
asked by
Amanda
427 views
An FM radio station broadcasts at 97.4 MHz. Calculate the wavelength of the corresponding radio waves.
5 answers
asked by
sarah
1,948 views
A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV
6 answers
asked by
sarah
2,243 views
1. Why can't you have 3 electrons in one orbital?
2. Why does Indium break the left to right trend for ionization energy?
1 answer
asked by
Jared
365 views
In the lab, you're handed a test tube with sodium chloride dissolved in water. You add aqueous barium carbonate to the tube.
1 answer
asked by
lena
450 views
In the formation of sulfur hexaflouride, does the reaction at constant pressure or volume proceed more spontaneously?
I've done
1 answer
asked by
xX_Supaman_Xx
393 views
The total pressure in a flask containing air and ethanol at 257C is 845 mm Hg. If the pressure of the air in the flask is 762 mm
2 answers
asked by
matt
573 views
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is
1 answer
asked by
jin
457 views
When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope
1 answer
asked by
jin
444 views
how many liters of chlorine gas can be produced when .98L of HCl react with excess O at STP? 4HCl(g) + O2(g) => 2Cl(g) + 2H2O(g)
2 answers
asked by
Lotherio
1,271 views
A sample of O2 gas is placed in a sealed 1.00 L flask and pressure is measured as temperature is changed. The data are plotted
3 answers
asked by
Adam
521 views
how do you know which halide salts confirms a presence of F- ions, Cl- ions, Br- ions, and I- ions?
1 answer
asked by
Amanda
1,027 views
a radioactive fission product of nuclear explosions and sccidents is often iodine 131 which becomes distributed in the
1 answer
asked by
Amanda
399 views
delta T = Kf*molality
Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass =
4 answers
asked by
Mark
436 views
The concentration unit used in Raoult's Law calculations is???
3 answers
asked by
miley
502 views
What should you mix with trisodium citrate to prepare a buffer solution, a strong acid or a strong base?
1 answer
asked by
Anthony
446 views
What is the name for the solution that can dissovlce no more solutte?
a.unsaturated b.saturated c.supatersaturated
1 answer
asked by
Anonymous
290 views
How do u find the Hvap if you only know the slope is -.002 ?
2 answers
asked by
James
1,143 views
The reaction A + B „³ C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of
3 answers
asked by
Sarah
842 views
how do u put this in scientific notation 3x 10^3 +4.0 x 10^4
6 answers
asked by
john
523 views
The "proof" of an alcoholic beverage is twice the volume percent of ethanol, C2H5OH, in water. The density of ethanol is
3 answers
asked by
alicia
1,092 views
2H202--> 2H20 +O2
Given that you started with ½ cup of H2O2, what was the mass of each product in the reaction? (1/2 cup = 118.3
2 answers
asked by
john
1,054 views
drbob you helped me with this problem the other day but i have a question.
-i changed 500mL of ethanol to grams then to mol. i
3 answers
asked by
alicia
418 views
For a primitive cubic unit cell, r=6.0
what is the body diagonal in terms of r, the lattice pt radius
4 answers
asked by
jin
481 views
Which of the following is NOT true about the thermodynamic standard state?
A. A gas is in its standard state when its pressure is
3 answers
asked by
Anonymous
712 views
what are Gregor Mednel's two greatest impacts on modern times.
4 answers
asked by
Jon
337 views
What is the sum of the coefficients (including “1”) of the following reaction?
Sodium sulfate + calciumhydroxide--> ???
1 answer
asked by
cal
368 views
Which pair begins wtih the larger particle?
a)K+, K b)N,N -3 c)Mg+2,Ca+2 d)F-,F e)O-2,S-2
3 answers
asked by
tony
346 views
show charges on each atom in following bonds:
Cl-Cl Sr-O H-O Br-I
5 answers
asked by
bill
387 views
How many grams of nitric acid(HNO3) will be produced when 0.51 mol of dinitrogen pentoxide reacts with water to form nitric
3 answers
asked by
megan
1,323 views
HNO3 (g) + 4H2 (g) ---> NH3 (g) + 3H2O (g) deltaH = -637 kJ
Calculate the enthalpy change when one mole of hydrogen reacts; and
4 answers
asked by
Anonymous
1,277 views
How many moles of water are produced when 1.05 g of oxygen gas reacts with 1.22 g of hydrogen gas to produce water?
3 answers
asked by
megan
1,385 views
Consider the following chemical equilibrium:
SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J i. adding oxygen gas ii.
2 answers
asked by
Anonymous
742 views
What volume of carbon dioxide is produced at 0 degrees C and 1 atm when 1.6 L of oxygen is used to burn acetylene(C2H2)?
1 answer
asked by
tim
343 views
name the following compounds and tell what type of compound they are (binary ionic. ternary ionic, or binary molecular)
a)FeBr3
4 answers
asked by
Annonymous
1,999 views
how to draw the structure of AlHAtCl_2-?/
1 answer
asked by
anis
308 views
For the reaction:
PCl3(g) + Cl2(g) --> PCl5(g) at 85 degreeC, Kp = 1.19 If one starts with 2.00 atm pressure of PCl3, 1.00 atm
2 answers
asked by
jack
607 views
what do the coefficents in a balanced equation mean?
1 answer
asked by
kate
393 views
Which do you run out of first, the limiting reactant or the excess reactant?
1 answer
asked by
megan
372 views
How does the law of conservation of matter apply to chemical reactions?
3 answers
asked by
Anonymous
1,371 views
method of producing aspirin
1 answer
asked by
dc
672 views
Determine whether the following are endothermic or exothermic.
2H2O2 (l) �¨ 2H2O(l) + O2(g) ∆H = -190 kj C(s) + H2O (g) �¨
2 answers
asked by
c
617 views
a 1,000 ml coke bottle is 1/3rd filled with coke, and the rest occupied with air. Suppose this bottle is left outside and
1 answer
asked by
Anonymous
423 views
At hihg temperatures Sodium chlorate decomposes to form Sodium Chloride and Oxygen gas. A 0.8765 gram sample of sodium chlorate
2 answers
asked by
Anonymous
589 views
when u pierce a hole in a bottle filled with water, but the cap is on, why doesnt the water spill out through the hole?
2 answers
asked by
Jacksonb
514 views
mass of mg- .28
mass of o- .41 calculate the moles of mg and o what is the simples whole number ratio of the moles of mg to the
3 answers
asked by
ashley
1,366 views
Balance the following oxidation-reduction reaction in acid solution:
SO32- + MnO4- --> SO42- + Mn2+ + H2O
4 answers
asked by
Anonymous
2,708 views
What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is
1 answer
asked by
lyne
445 views
Next step, multiply both sides by (.01-x)
.012(.01-x)=.01x+x^2 gather terms, put in standard binomial form, use the quadratic
3 answers
asked by
lyne
481 views
DrBob has given you the equation to use:
k2 = [H^+][SO4^-]/[HSO4^-] and the values to substitute [H^+] = 0.01 + x [SO4^-2] = x
4 answers
asked by
lyne
446 views
a) whart chemical principle is the basis for the activity series of metals?
b) What is the significance of the distance between
3 answers
asked by
john
557 views
A sample of fluorine has a volume of 3.6 L when the temperature is 112.3 degC and the pressure is 922 torr. What will be the
1 answer
asked by
zach
388 views
A sample of hydrogen has a volume of 1100 mL when the temperature is -0.899999999999999 degC and the pressure is 0.888 atm. What
2 answers
asked by
zach
500 views
Calcualate the volume of 0.300mol of gas at 60 degrees C and 0.821atm.
6 answers
asked by
bill
1,143 views
Nitrogen(75.5 kPa), oxygen (19.2 kPa), carbon dioxide(0.05 kPa) and water vapor(4.3 kPa) are the usual atmospheric components.
2 answers
asked by
joe
1,126 views
a 4 L sample of gas at 30 degrees celcius and 1 atm is changed to 0 degrees celcius and 145,000Pa. what is its new volume?
6 answers
asked by
bill
1,418 views
1. What is the [K+] of a solution prepared by dissolving 0.140 g of potassium hydroxide in
sufficient pure water to prepare 250.0
3 answers
asked by
nelson
1,455 views
hydgogen and iodine form HI(g)per the reaction H2(g)+I2=2HI(g). If 2 L of iodine gas at .5 atm and 295 K react with excess
1 answer
asked by
bob
427 views
when ammonium nitrate decomposes, nitrogen, hydrogen, and oxygen gas are generated per the reaction
4 answers
asked by
bill
653 views
What is the formula that relates partial pressure of half-cells and E for the cell?
1 answer
asked by
Ginger
352 views
What are the three types of intramolecular forces?
1 answer
asked by
bill
293 views
how do you solve for a problem where they ask you to identify an unknown salt (they give you three choices) when you are given
1 answer
asked by
ami
398 views
which of the following would have the hoighest boiling point: 1-bromethane, acetic acid, or ethane?
4 answers
asked by
bill
459 views
Br + CHCOOH
4 answers
asked by
~christina~
310 views
Why does acetic acid have a higher boiling point than 1-bromoethane if the molar mass for 1-bromoethane is higher?
4 answers
asked by
joe
669 views
The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an
1 answer
asked by
anonymous
408 views
20ml sample of .200M HBr is titrated w/ .200M NaOH. what is the ph after adding 15ml (base)?
2 answers
asked by
ami
648 views
If one gram of solid ice at -20 degrees C is heated to gaseous water at 125 degrees C how much energy is required?
3 answers
asked by
joe
397 views
If 25 grams of solid ice at-20 degrees C is heated to gaseous water at 125 degrees C, how much energy is required?
3 answers
asked by
joe
2,087 views
How much heat(energy) in calories will it take to warm 25 g of ice at -10 degrees C to liquid water at 40 degrees C?
2 answers
asked by
bob
705 views
why are the atomic emission line spectra different for each element?
3 answers
asked by
natash
789 views
what colored lines are expected in the atomic emission spectrum for mercury?
2 answers
asked by
natash
497 views
H2 + H2O ->??
3 answers
asked by
David
436 views
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