Questions LLC
Login
or
Sign Up
Ask a New Question
Categories
chem
Page 5
Questions
For the following reactions, name the Bronsted-Lowry acids and bases. Then name the conjugate acid and bases.
H3O+(aq) + CN-(aq)
1 answer
asked by
Chris
892 views
Section: Ionization expressions, Weak Bases
Using the equilibrium constants listed in your book, arrange the following .1 M
1 answer
asked by
Chris
716 views
Kw = KaKb. With this equation you can convert any Ka to Kb and the reverse.
Codeine (Cod), a powerful and addictive painkiller,
3 answers
asked by
DrBob222
1,041 views
what has an sp2 hybridized carbon?
Amine Alcohol Keytone Ethers Aldehyde
1 answer
asked by
markr
464 views
So I was given this question that I havetried to solve multiple times but I just can't get it. Here it is[it's a long one!]
Nitro
1 answer
asked by
amy
427 views
Which shows the greatest metallic character?
-Na -K -Rb -Cs Also, What ions are very important for the proper functioning of
1 answer
asked by
DavidG
527 views
The solubility product of nickel (II) hydroxide at 25°C is 1.6 x 10-16.
a) Calculate the molar solubility of nickel (II)
1 answer
asked by
Ilene
1,254 views
I'm stuck on this one aswell...
50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution
1 answer
asked by
Ilene
1,025 views
I don't understand ehat is the chemistry behind the ASA – FeCl3 reaction? what is this question even asking? any response will
1 answer
asked by
mel
395 views
I posted a question earlier that I was having trouble with, but I was unable to attempt to try it again for several days after
1 answer
asked by
James
822 views
Is lithium hydroxide a strong or weak base?
It is 100% ionized so, by definition, it is a strong base. Try looking up Kb for LiOH
1 answer
asked by
Anna
615 views
In a solution at constant H+ concentration, iodide ions react with hydrogen peroxide to produce iodine.
H+ + I- + 1/2H2O2 -->
1 answer
asked by
Keith
602 views
Although CHsubscript4 has 4 hydrogens, it is an acid. Why?
It is NOT an acid. Did you make a typo or misread your notes/question?
1 answer
asked by
Fidelia
437 views
what is a liquid solution and a gaseous solution?
Do you intend to ask us to name a liquid solution and a gaseous solution. One
1 answer
asked by
revie
887 views
HCl is a strong acid and ionizes 100%.
NaOH is a strong base and ionizes 100%. We have no way of knowing the pH of HCl + H2O
1 answer
asked by
DrBob222
739 views
which are electrolytes: ethanol, benzene, CuSO4
A CuSO4 SOLUTION is an electrolyte. Ethanol and benzene do not ionize; therefore,
1 answer
asked by
billie
433 views
what is a liquid solution and a gaseous solution? [define plz]
liquid solution: sea water gas solution: air i don't need
1 answer
asked by
revie
668 views
Is ammonium hydroxide a strong or weak base and how do you know that?
Technically there is no such thing as ammonium hydroxide.
2 answers
asked by
Horacio
896 views
what occurs when an atom of clorine and an atom of hydrogen become a molecule of hydrogen chloride?
a a chemical bond is broken
1 answer
asked by
Katie
794 views
How is the process of drying clothes on a clothesline different than drying clothes in a dryer?
Thanks. Just more heat in the
1 answer
asked by
Gloria
1,175 views
What advantage is there to adding salt to cooking water?
and what conditions are necessary for ideal carbonation of a beverage?
1 answer
asked by
Horacio
1,111 views
how much water would you need to add to 20.0 mL of 2.0 M NaCl to make a 0.10 M solution?
try the formula c1V1 = c2V2 (where c1 is
1 answer
asked by
beckii
453 views
is window cleaner an acid or base
acid? Most window cleaners are basic. Many have the odor of ammonia. The ammonia odor usually
3 answers
asked by
marcuz
3,203 views
is vegetable oil a base and vinegar an acid? [i mixed up the litmus strips and now i don't know which one is which and i'm out
1 answer
asked by
marcuz
412 views
hi,
Can anyone plz advise me if this is the correct ballanced equation for CH4+NH3+O2 - HCN+H2O Answer: CH3+NH2+O1 - H3N+H2O1 Is
1 answer
asked by
bertie
396 views
Calculate [H+] in 0.375M H2PO4 Ka=6.2x10^-8
I know I'm suppose to write the equation first, but I'm not sure if I did it right:
1 answer
asked by
Amanda
429 views
no idea how to do this! Please help!
Determine the freezing point of a water solution of fructose( C6H12O6) made by dissolving
1 answer
asked by
Anonymous
503 views
why is H+ a proton
h+ would be a proton because it has a positive electric charge,just as all protons have to be positive. im
2 answers
asked by
anona
527 views
name three ways to increase the pressure inside an oxgen tank
What do you think? Heat the tank? Add oxygen? Add another gas?
1 answer
asked by
sam
387 views
what celsius temperature corresponds to absoulte zero?
Kelvin = C + 273.15. solve for C when K = 0. You should use the same name
2 answers
asked by
Ann
523 views
list three examples of things you see and use every d day that apply gas properties
I shall be happy to critique your thoughts.
1 answer
asked by
Anonymous
364 views
Of the floowing compound, which would you exoect to have the lowest vapor pressure at room temperature:
CHCl3 CH2Cl2 CH3Cl CCl4
1 answer
asked by
Ron
413 views
Predict the order of the increasing vapor pressure for the following compounds:
FCH2CH2F FCH2CH2OH HOCH2CH2OH Result:the order
3 answers
asked by
Ron
784 views
Classify each of the follwing by the type of solid(molecular, ionic, metallic, covalent network)it will form:
a) Na b) Fe c) SiO2
2 answers
asked by
Avi
562 views
a 2.50g sample of hydrate of calcium sulfate losses 0.523g of water when heated. what is the mass percent of water in the
1 answer
asked by
mocha81
936 views
how many grams of sulfur are needed to react w/ 246 grams of mercury to form HgS?
Hg + S ==> HgS unless your instructor insists
2 answers
asked by
christine
902 views
Forty-two grams of benzoic acid is treated with concentrated nitric acid in some sulfuric acid. Forty-two grams of the major
1 answer
asked by
Damon
665 views
How would i found out the freezing point of a solution which has 0.05mol of acetic acid dissolved into 125g of benzene? Benzene
1 answer
asked by
Chris
485 views
What is the importance of an H-bond in water?
It raises the boiling point of water; otherwise, following the sequence of H2Te,
1 answer
asked by
Big d
512 views
in the design of parts, it is genarally a good idea to avoid region or points ofstress
concentration since these regions are
1 answer
asked by
Damon
483 views
I have the eV values of two different materials that are being used for a high speed LEDs. I am in the dark on how to combine
1 answer
asked by
manny
362 views
Are these correct?
Rank the following species in order of increasing acidity. Explain your reasons of ordering them as you do.
2 answers
asked by
manny
2,574 views
Hello, I need help solving this problem on intermolecular dispersion forces. Can you explain how I go about finding the answer?
W
3 answers
asked by
manny
711 views
Hers's a question im not sure how to do
Write a mechanism for the acid-catalyzed transesterification reaction of ethyl acetate
4 answers
asked by
manny
505 views
What is the pH of a solution of 120 ml 0.15M acetic acid to which we add 30mL 0.2M NaOH?
I have a bit of a hard time with this
9 answers
asked by
Gulzaman
573 views
Is it easier to separate substances from concetrated or dilute solutions?
3 answers
asked by
manny
307 views
<b>1.)</b> When determining the melting point it's described in my text as recording 2 points in the melting process.
a) when the
3 answers
asked by
~christina~
908 views
Ok... i have no idea how to do this problem.... if anybody can help, that would be very much appreciated
________________________
3 answers
asked by
manny
601 views
what is the % of CI in CCl4?
1 answer
asked by
sty
374 views
----------
A compound has the formula Mg3X2. If 1.87 g of X combines with 4.86 g of magnesium, what is the atomic weight of X? A)
4 answers
asked by
manny
543 views
Hi am doing a question for HW. Just need to double check:
Is this the balanced equation for the combustion of titanium(IV)
3 answers
asked by
manny
412 views
how would you make a 4% percent paraformaldehyde solution?
Work: starting from 20% (diluted with PBS) V1C1=V2C2 (100)(20)=(x)(4)
1 answer
asked by
t
309 views
Fe(s) + Cu^2+(aq)--> Fe^2+(aq) +Cu(s)(1)
2Fe(s) + 3Cu^2+(aq)--> 2Fe^3+(aq) +3Cu(s) (2) suppose that you use 1.110 g of Iron in
2 answers
asked by
cindy
619 views
write the abbreviated notation 9based on noble gas) for S:
3 answers
asked by
taysha
311 views
what mass of hematite (fe^2O^3)is required to react with excess carbon and produce 2.845g of iron, if the % yield is 75.369
formu
2 answers
asked by
Anonymous
484 views
what is the spdf electron configuration for s?
i got [NE]3s23sp4 as an answer is this correct?
4 answers
asked by
tay
1,027 views
also what does it mean when they say write the abbreviated notation
(based on noble gas) for s? how do i begin to do this
1 answer
asked by
tay
348 views
how do you draw the lewis structure for PBr3?
4 answers
asked by
madison
1,452 views
Question:
The American Dental Association recommends that an adult female should consume 3.0mg of fluoride (F-) per day to
4 answers
asked by
leo
5,027 views
A particular coal contains 2.55% sulfur by mass. When the coal is burned, it produces SO2 emissions which combine with rainwater
4 answers
asked by
DD
1,311 views
hey I am really stumped...I would really appreciate some help with this question
1.0560g of antacid is weighed and mixed with
3 answers
asked by
Alexa
555 views
which of these substances dissolve in water? and are they elements or compounds?
copper nitrate sodium hydroxide copper hydroxide
2 answers
asked by
Sar
1,138 views
mass of element = 311.1269 amu
what is mass of 1.36 moles of these atoms in g Hint: (1 mol = 6.022 x 1023 atoms) and (1 amu =
3 answers
asked by
Mike
583 views
A 0.01205 mg sample of an unknown compound was found to contain 0.0001 mg of H, 0.0043 mg of Cl, and 0.0077 mg of O. It was also
4 answers
asked by
Mike
569 views
Mass of tablet: 1.4930g
Volume of HCL added: 100ml Find the milimoles of HCL added I have many questions similar to this, could
4 answers
asked by
Alexa
509 views
Malonic acid and succinic acid each have two different pKa values.
Malonic Acid pKas: 2.85 and 5.70. Succinic acid pKas: 4.20 and
2 answers
asked by
Rossel
897 views
how much of each of the following substances would you add to water to prepare 1.20L of a .85M solution? (sodium carbonate from
2 answers
asked by
mel
923 views
I have the following problems- write net ionic equations for reactions if no reaction write NR....
silver nitrate and ammonium
2 answers
asked by
mel
1,073 views
what is the formula that will be used for this ?
what volume of .100 M NaOH will react completely with 24.00 mL of .900 M HCl?
2 answers
asked by
mel
714 views
A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to
2 answers
asked by
mel
945 views
A solution is prepared by dissolving 16.5 g ammonium sulfate in enough water to make 145.0 mL of stock solution. A 10.50 mL
3 answers
asked by
mel
873 views
The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm
4 answers
asked by
mel
1,372 views
A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first
2 answers
asked by
mel
758 views
for the reation: B203 + 3Ca = 2B + 3 CaO
how do i attempt to know which 1 is oxidized? I really do not understand chemistry its
1 answer
asked by
Madison
397 views
the wavelength of ligh is 310 nm. calculate the frequency?
what is the wavelength of electromagnetic radiation if its frequency
3 answers
asked by
Amanda
1,679 views
How can the energy levels of electrons be determined by measuring the light emitted from the atom?
3 answers
asked by
Amanda
781 views
Give the full set of quantum numbers for the electron lost when a Cs atom ionizes.
a. n = 6; l = 1; ml = –1; ms = +½ b. n = 5;
2 answers
asked by
Sam
575 views
Arrange the atoms in order of increasing IE1.
As, Sb, Sn a. Sb < As < Sn ANSWER is it correct b. Sb < Sn < As c. Sn < Sb < As d.
1 answer
asked by
Sam
458 views
given the reaction -
Fe(s)+H2SO4(aq)->FeSO4(aq) + H2(g) the volume of the balloon was 4400m^3 and the loss of hydrogen gas during
2 answers
asked by
mel
817 views
compund containing only C, H, and N yeilds the following data-
1. complete combustion of 34.3 mg of the compund producedmg of CO2
1 answer
asked by
mel
442 views
C6H12O6(aq)->2 C2H5OH(aq) + 2CO2(g)
Fermentation of 744mL grape juice(density=1.0 g/cm^3) is allowed to take place in a bottle
3 answers
asked by
mel
983 views
75L stainless steel container was charged with 3 atm of hydrogen gas and 4 atm of oxygen gas. a spark ignited the misture,
3 answers
asked by
mel
683 views
using the van der Waals equation calculate the pressur exterted by .5160 mol N2 in a 1L container at 24.6C
4 answers
asked by
mel
453 views
a 2.747g sample of manganese metal is reacted with excess HCl gas to produce 3.24L of H2 at 366K and .927atm and a manganese
5 answers
asked by
mel
1,244 views
a 13.5L tank is filled with H2 to a pressure of 2x10^2atm. How many balloons (each 2L) can be inflated to a pressure of 1 atm
3 answers
asked by
mel
999 views
consider separate 1Lsamples of He and UF6 both at 1 atm and containing the same number of moles. what ratio of temps for the two
3 answers
asked by
mel
892 views
is a formate ion (HCOO-) an acid or a base?
how would you know?
2 answers
asked by
mark
1,121 views
At 298K, Go = -67.4 kJ for the reaction
CO + Cl2 --> CoCl2 Calculate the change in Gibbs free energy (in kJ) at the same
5 answers
asked by
Mike
699 views
In 1897 the Swedish explorer Andree tried to reach the North Pole in a balloon. The balloon was filled with hydrogen gas. The
6 answers
asked by
mel
1,379 views
given the reaction -
Fe(s)+H2SO4(aq)->FeSO4(aq) + H2(g) the volume of the balloon was 4400m^3 and the loss of hydrogen gas during
2 answers
asked by
mel
538 views
A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is
5 answers
asked by
mel
697 views
A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is
6 answers
asked by
mel
1,357 views
A piece of solid carbon dioxide, with a mass of 6.2 g, is placed in a 4.0 L otherwise empty container at 21°C.
( a) What is the
4 answers
asked by
mel
2,384 views
a) Calculate the pressure exerted by 0.5160 mol N2 in a 1.0000 L container at 24.6°C using the ideal gas law.
atm (b) Calculate
6 answers
asked by
mel
852 views
A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is
2 answers
asked by
mel
515 views
A 75.0 L stainless steel container was charged with 3.00 atm of hydrogen gas and 4.00 atm of oxygen gas. A spark ignited the
3 answers
asked by
mel
881 views
what is the equation for calculating ÄE?
here is my info- q=-39kJ, w=88kJ
3 answers
asked by
mel
308 views
a system udergoes a process consisting of the following 2 steps-
1. absorbs 79J of heat while 26J of work is done to it 2. system
3 answers
asked by
mel
598 views
in the equation 2SO2 + O2 -> 2SO3
how do you find if work done is >, <, or = to 0?
2 answers
asked by
mel
691 views
consider a mixture of air and gasoline vapor in a piston. original V is 30cm^3. if the combustion of misture releases 985J
5 answers
asked by
mel
601 views
Pages
1
2
3
4
5
6
7
8
9
10