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when two layers form during an ether/water extraction, what would be an easy, convenient way to tell which layer is which if the
4 answers
asked by
Jason
1,145 views
The solubility of KNO3 is 155 g per 100 g of water at 75 degrees celcius and 38.0 g at 25 degrees celcius. What mass (in grams)
3 answers
asked by
Mischa
1,468 views
consider the following thermochemical equation for the combustion of acetone
C3H6O(l)+4O2(g)---->3CO2(g)+3H2O(g) delta H
4 answers
asked by
natash
1,603 views
Zinc dissolves in acid according to the balanced equation.
Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
2 answers
asked by
tomi
537 views
what are the mono saccharides in sophorose
1 answer
asked by
Anonymous
229 views
Zinc dissolves in acid according to the balanced equation.
Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
2 answers
asked by
tomi
587 views
calculate the longest wavelength visible to the human eye
2 answers
asked by
anna
1,144 views
why does the addition of a salt (like sodium chloride) to the aqueous layer sometimes help break up an emulsion that forms in an
4 answers
asked by
Jason
1,860 views
The Rf value of compound A is .34 when the TLC plate is developed in hexane and .44 when the plate is developed in diethyl
4 answers
asked by
Jason
3,762 views
should atmospheric pressure increase or decrease as one goes from the beach to the mountains? why?
3 answers
asked by
Tabby
2,333 views
which is the least stable isomer of C4H8:
methyl cyclopropane or cyclobutane and why?
3 answers
asked by
Mischa
1,145 views
What electron transition in a hydrogen atom, starting from the orbit 10, will produce infrared light of wavelength 3040 ?
3 answers
asked by
tomi
896 views
The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164kJ/mol.
Calculate the longest
3 answers
asked by
natash
881 views
How much energy is required to ionize a hydrogen atom in its ground (or lowest energy) state?
What wavelength of light contains
3 answers
asked by
natash
1,469 views
a crude non acidic product mixture dissolved in diethyl ether contains acetic acid. describe an extraction procedure that could
3 answers
asked by
Jason
2,055 views
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing
2 answers
asked by
Jason
647 views
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing
3 answers
asked by
Jason
2,712 views
K2CO3 is an excellent drying agent for some classes of organic compounds. would it be a better choice for an acid (RCO2H)or an
5 answers
asked by
Jason
2,014 views
A laser pulse with wavelength 540 nm contains 4.40 Mj of energy. How many photons are in the laser pulse?
3 answers
asked by
nicole
1,470 views
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions.
n=5 to
3 answers
asked by
nicole
1,507 views
what is the electron configuration for Au+ ?
where does f block fit in?
2 answers
asked by
natash
583 views
why would it be dangerous to heat a liquid in a distillation apparatus that had no vent or opening to the laboratory?
- is this
2 answers
asked by
Jason
577 views
a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this
3 answers
asked by
tomi
830 views
a compound containing only boron, nitrogen and hydrogen was found to be 40.3% B, 52.2%N, and 7.5% H by mass. If 3.301g of this
3 answers
asked by
tomi
809 views
methanoic acid react with potassium dichromate to form what?
A colorless solution and CO2 is formed as known
2 answers
asked by
david
472 views
A vessel containing 39.5 cm^3 of helium gas at 25 degrees celsius and 106 kPa was inverted and placed in cold ethanol. As the
3 answers
asked by
Anna
1,093 views
What is the relationship between kPa and atm when dealing with measurements of pressure of a gas?
3 answers
asked by
Anna
357 views
A solution consisting of isobutyl bromide and isobutyl chloride is found to have a
refractive index of 1.3931 at 20oC. The
3 answers
asked by
un
709 views
The average bond enthalpy for a C=C double bond is 614kj/mol and that of a C-C single bond is 348kj/mol . Estimate the energy
3 answers
asked by
tomi
1,809 views
Use bond energies to estimate the enthalpy change for the following reaction
C2H2 + H2-> C2H4 i figured the bonds broken are: 1 C
4 answers
asked by
tomi
2,689 views
What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the
4 answers
asked by
tomi
6,079 views
What is the longest wavelength of light that will provide photons of sufficient energy to break the pi bond and cause the
2 answers
asked by
tomi
479 views
stilll didn't get it .. .. can u plz explain in detail ... how did u get the answer.. plz plz plz plz plzp l zp
thnks Bond
4 answers
asked by
DR B Plz HELP
636 views
Write mass and charge balances for SrSo4 (s)+ So4^2-
So4^2- + H2O --> HSO4- + OH- and H2)---> H+ + OH-
2 answers
asked by
Jesse S
933 views
how do i calculate the concentration of F ions using pH in ppm
1 answer
asked by
erica
353 views
evaluate E^0 for the half reaction:
CO2 (g) + 2H + 2e^- <--> HCOOH ( Aq)
2 answers
asked by
katya
742 views
consider the cell
Pt(s)I H2 (g. 0.100 bar)I H+ (aq, pH= 2.54)IICl^- ( aq, 0.200 MI Hg2Cl2(S)IHg (l)IPt(s) a. write a reduction
2 answers
asked by
katya
952 views
The voltage of the cell
Pt (s) I H2 ( 1 bar)I RNH2(0.1 M), RNH3+ Cl(0.05 M)IIS.H.E. is 0.49 V. Find kb of the base, RNH2
2 answers
asked by
katya
530 views
The atmospheric pressure at the summit of Mt. McKinley is 554 mm Hg on a certain day. What is the pressure in atmospheres and in
3 answers
asked by
hannah
1,620 views
An optical rotation study gives a result of alpha=+140 degrees. Suggest a dilution experiment to test whether the result is
3 answers
asked by
Jason
775 views
What is the energy of one mole of photons with a wavelength of 375 nm? (h = 6.63 x 10-34 J • s, N = 6.02 x 1023)
A. 5.30 x
2 answers
asked by
trevor
1,176 views
The normal boiling point of water is 100.00 degrees celsius and the enthalpy of vaporization at this temperature is
2 answers
asked by
tomi
568 views
What is the boiling point of water at an elevation of 1.55×10^4 ft ?
The atmospheric pressure at sea level is 760mmHg . This
3 answers
asked by
tomi
1,610 views
i have to catogerize the list based on which is ionic, polar covalent, and nonpolar covalent
1.SI 2.HBr 3.HP 4.SO 5.BeF 6.BeCl
2 answers
asked by
tomi
496 views
what is the orbital diagram for Au+, how do you fit the f orbitals in?
4 answers
asked by
Natash
2,386 views
what is the cell voltage when saturated calomel and Pt electrodes are dipped into a solution containing 0.00217 M Br2 (aq) and
1 answer
asked by
katya
637 views
Right hand side of cell was titrated with Nh3 while monitoring cell voltage:
Ag(s)IAg^+ (aq, 0.1 M, 25.0 mL)II Ag^= (aq, 0.1 M,
1 answer
asked by
katya
675 views
order the elements Mg, K, Ca, S according to second ionization energy
I know that K would have the highest second ionization
2 answers
asked by
Natash
516 views
what is the appropriate hybridization for the carbon atom in CO2?
the explanation I was given is 2 electron groups around the
2 answers
asked by
Natash
745 views
List the experimental conditions that favor Sn1 reactions, and those that favor Sn2 reactions.
2 answers
asked by
Jason
585 views
would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under sn1 conditions? sn2 conditions?
- would it
1 answer
asked by
Jason
506 views
Would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under Sn1 conditions? Sn2 conditions?
1 answer
asked by
Jason
679 views
i am having trouble with the following question....
How would you expect the following series of compounds to compare in behavior
1 answer
asked by
tina
501 views
why do more electrons increase dispersion forces?
4 answers
asked by
Robin
422 views
A piece of lithium metal with a mass of 3.25g reacts with sufficient hydrochloric acid in a closed flask containing 235 mL of
2 answers
asked by
john
576 views
how is nuclear binding energy related to the mass defect?
1 answer
asked by
melissa
407 views
Rank the following compounds in order of decreasing boiling point:
KCI CO2 CH2O
4 answers
asked by
Natash
2,114 views
a solution of weak acid of molarity 0.05 mol/dm3 is titrated against 0.1mol/dm3 NaOH, the pka = 3.67
what volume of acid would u
2 answers
asked by
Kimora
481 views
What type of bond causes the compound to be more likely soluble in alcohol?
1 answer
asked by
GO OU!!!
345 views
For a given quantum number, n, which electrons will experience the greatest Z*, s or p??????
1 answer
asked by
Kim
320 views
51 o
___CR + -1 e ---> + Y 24 Emission: write a balances nuclear equation and name the type of radioactive emmision formed
10 answers
asked by
melissa
394 views
describe what happens when a nucleus is stabilized by converting protons into neutrons
4 answers
asked by
melissa
1,915 views
why are sig. figs important?
1 answer
asked by
Natash
364 views
A group of atoms that may act as an ion is referred to as _________???
3 answers
asked by
GO OU!!!
397 views
determining hydroxide and hydrogen concentrations?
what formulas ?
7 answers
asked by
Anonymous
359 views
What is the activation energy for a reaction whose rate is tripled by a temperature increase from 27.5°C to 55.5°C?
1 answer
asked by
brian
370 views
Quantitative analysis of soda ash by double indicator
*why there is a need to boil distilled water in the preparation of base
3 answers
asked by
tintin
1,023 views
a certain substance strongly absorbs infrared light having a wavelength of 3.75µm. what is the frequency of this light in
7 answers
asked by
lyne
815 views
which element has a more favorable (exothermic) electron affinity?
K Mg how do i determine this?
2 answers
asked by
lyne
1,270 views
Dr Bob please answer below
1 answer
asked by
lyne
314 views
What mass of iron contains the same number of atoms as 70.05 g of nitrogen?
7 answers
asked by
lyne
664 views
what is the metal ion formula for
BaCL2 (times) 2H2O
3 answers
asked by
mel
510 views
Nacl
what is the metal ion formuala and non metal formula
1 answer
asked by
mel
459 views
A sample of 45.0 ml of 0.750M AgNO3 solution is added to 65.0ml of 1.375M Cr(NO3)3 solution. Calculate the resultant
1 answer
asked by
bec
435 views
what would cause scientists t change the current model of an atom
3 answers
asked by
mel
443 views
how many protons, nnutrons, atomic mass, mass number, and charge to each of the following have?
sodium atom fluorine ion stannic
6 answers
asked by
lyne
660 views
need help on chemistry below
1 answer
asked by
lyne
339 views
are these correct when solving for proper significant figures
2.33 + 4.0045=6.33 .000456 + 1.0023=1.0027 2.33/4.0045=.582
2 answers
asked by
lyne
480 views
sorry for all the questions i have an exam tomoro!
but what is intrinsic or intensive are they the same?
1 answer
asked by
lyne
412 views
The term Intrinsic denotes a characteristic or property of some thing or action which is essential and specific to that thing or
3 answers
asked by
lyne
594 views
find the density of a cube if it has a mass of 2 grams and has a length of i centimeter on each edge/
1 answer
asked by
tonya
357 views
If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube
of the same material with sides 2.63 cm in length
3 answers
asked by
laura
439 views
What would be the effect of raising the temperature and increasing the carrier gas flow rate on the ability to resolve two
4 answers
asked by
jason
2,769 views
The formation of CsCl from Cs(s) and Cl2(g) involves the following steps:
1. Cs(s)-Cs(g) 2. 1/2 Cl2(g)-Cl(g) 3. Cs(g) –Cs^+(g)
2 answers
asked by
Juliee
654 views
I have a problem i don't get...
H3PO4+3NaOH -> 3H2O+Na3PO4 How many moles of Na3PO4 will be produced from 1.7 moles of NaOH in
2 answers
asked by
Bob
643 views
quantitative determination of acetylsalicylic acid in aspirin tablets by back titration
1)why do we use a more dilute NaOH
3 answers
asked by
krissy
1,568 views
how wood i balance itt??
NH3 + O2 -> H2O + NO
3 answers
asked by
gabriella
393 views
write a mechanism for the reaction of sodium chloroacetate with 4-chlorophenolate.
- i know its a sn2 mechanism, but I don't know
1 answer
asked by
jason
682 views
Calculate the molar mass of
K2[Cu(C2O4)2]*2H2O I got 353.81 is this correct ?
3 answers
asked by
anna
2,195 views
If .275 moles of ferrous ammonium sulfate and an excess of all other reagents are used in a synthesis of
K3[Fe(C2O4)3]*3H2O, how
1 answer
asked by
anna
469 views
Is this how you write a skeleton equation i don't understand this
Lithium(s)+gold(III)chloride(aq)= Lithium chloride(aq)+gold(s)
2 answers
asked by
Lauren
1,184 views
find molar concentration of the solution.
.128 g of benzophenone and fill in a beaker with ethanol to the 50.00mL line i came up
1 answer
asked by
john
422 views
For substance A the emlting point is 16.61 degrees C and the specific heats of the solid and the liquid form are 2.662 and 5.188
1 answer
asked by
Amanda
423 views
or the compound:
carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation
1 answer
asked by
mary
390 views
reaction order
I know the form is r=k(A)a(B)b (a, b are exponents) and I know a and b depend on the concentration, but how do i
5 answers
asked by
Anonymous
347 views
Describe the melting point you expect to observe if the isolated product is
the mixture of both syn and anti addition of bromine.
1 answer
asked by
Jason
411 views
The diameter of a neutral neon atom is about 1.4 multiplied by 102 pm. Suppose that we could line up neon atoms side by side in
2 answers
asked by
hannah
560 views
how to set up or approach these
1. Calculate the mass in grams of iodine (I2) that will react completely with 48.9 g of aluminum
3 answers
asked by
hannah
715 views
What are some examples of chemical phenomena’s that are occurring around us every day?
1 answer
asked by
Jen
310 views
is iron (III) carbonate a solid or (aq)?
2 answers
asked by
Chopsticks
1,130 views
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