Questions LLC
Login
or
Sign Up
Ask a New Question
Categories
College Chemistry
Questions
A Galvanic cell consists of Mg electrode in a 1.0 mol L -1 Mg(NO3)2 solution and a Ag electrode in a 1.0 mol L-1 AgNO3 solution.
5 answers
asked by
Elleni
9,224 views
Calculate temperature when 0.50L sample or gas at 1.0 atm and 25degrees C is compressed to 0.05L of gas at 5.0 atm.
6 answers
asked by
la
2,497 views
In this lab: we demonstrated the method of evaporation of a saturated sodium chloride solution.
The following question ask: 1)
5 answers
asked by
Tim
3,572 views
How many milliliters of 0.100 M HNO3 are needed to neutralize the following solutions?
A. 45.0 mL of 0.667 M KOH B. 58.5 mL of
7 answers
asked by
Bekah
8,352 views
What are the concentrations of Pb2+ and Cu2+ when the cell potential falls to 0.370 V?
Given: A voltaic cell consists of a
5 answers
asked by
Maria
5,826 views
What is the approximate pH of a solution labeled 6 x 10^-5 M HBr?
7 answers
asked by
jahil
6,473 views
what is the approximate pH of a solution labeled 0.050 M HClO? I realized my mistake on my last post but this isnt a strong acid
5 answers
asked by
jahil
4,502 views
Determine Kc at 298 K for the reaction 1/2 N2(g0 + 1/2 O2(g) + 1/2 Cl2(g)--> NOCl(g), given the following data at 298 K
1/2 N2(g)
4 answers
asked by
Jalisa
1,119 views
Consider the reaction.
4Fe(s) + 3O2(g) �¨ 2Fe2O3(s) If 0.500 mol of Fe reacts with 0.400 mol of O2, what are the limiting
4 answers
asked by
Lisa
4,921 views
Consider the following reaction that occurs when natural gas is burned.
CH4(g) + 2O2(g) �¨ CO2(g) + 2H2O(g) How many moles of
6 answers
asked by
Lisa
2,310 views
Animals break down glucose (C6H12O6) as a source of energy according to the following overall reaction.
C6H12O6(aq) + 6O2(g) �¨
5 answers
asked by
Lisa
1,439 views
The density of a 0.0122 M KMnO4 is 1.037 g/mL. Suppose 26.35 g of 0.0122 M KMnO4 are required to titrate 1.072 g of a household
4 answers
asked by
Kelsey
2,586 views
The equilibrium constant for the conversion of cis-stilbene to trans-stilbene is Kc = 24.0 at 200 C. If cis-stilbene is placed
4 answers
asked by
Elleni
1,633 views
Calculate the unknown of Ag+ if the potential of the following concentration cell is 300 mV at 25.0 C.
Ag|Ag+(unknown)||Ag+(0.100
4 answers
asked by
Samantha
3,104 views
A 38 L gas tank at 35 Celsius has nitrogen at a pressure of 4.65 atm. The contents of the tank are transferred without loss to
4 answers
asked by
Smith
1,327 views
Calculate the pH of a 0.5 M Formic Acid (HCOOH) soln. ka= 0.00018
4 answers
asked by
Anonymous
3,710 views
Pentane has a boiling point of 36oC. What is this temperature equivalent to in K? ( Attach the units i.e. uppercase "K" to your
4 answers
asked by
Ryane
1,378 views
here is the question:
A sapphire gemstone contains 52.7% aluminum, 47.% oxygen, and traces of titanium. If the saoohire was found
5 answers
asked by
Jena
3,252 views
What is pH buffer of 0.1 mol L-1 Na2HPO4/O.15 mol L-1 KH2PO4?
KH2PO4? Given Ka(H2PO4-) = 6.2 x 10-8). I would like to know the
4 answers
asked by
Helen
2,584 views
Calculate pH of a 1.0 mol L -1 boric acid solution.
(Ka(H3BO3) = 5.8 x 10 power -10 Please solve this problem. My computer does
4 answers
asked by
Elleni
1,270 views
Determine the values of Kc that correspond to the following values of Kp
(a) SO2Cl2(g)--->SO2(g) + Cl2(g) Kp= 2.9 x 10^-2 at 303
4 answers
asked by
Shanice
1,216 views
Determine the pH of a solution that contains 5.3*10^-2 M in HClO4 and 3.0*10^-2 M in HCl?
4 answers
asked by
Mickey
953 views
A sample of an iron alloy contains 92.1g Fe, 2.59g C, and 1.59g Cr. Calculate the percent by mass of each component present in
5 answers
asked by
Michelle
3,123 views
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00-g sample of each compound. One
4 answers
asked by
Christina
3,999 views
Arrange the following compounds in the order of increasing Ksp: AgCl, AgBr, AgI. Explain your reasoning.
I got AgI<AgBr<AgCl but
4 answers
asked by
Anissa
2,166 views
Given: 2Al2O3 (s) 4Al (s) + 3O2 (g) °H = 3351.4 kJ, what is °H for the formation of 12.50 g of aluminum oxide?
Help please.
4 answers
asked by
Taylor Marie
2,662 views
Calculate the ratio of NaF to HF required to create a buffer with pH=3.95.
Also, can you please explain in a nutshell the whole
7 answers
asked by
Katie
5,550 views
a) Water drops, sitting on your skin after a dip in a swimming pool, evaporate. Identify the system and its surroundings for the
4 answers
asked by
Molly :)
1,836 views
How many orbitals have the following quantum numbers: n=6, l=2, ml=-2??
a. 0, b. 5, c. 7, d. 10, e.6 Since only one can include
4 answers
asked by
James
2,518 views
BF3 can best be described through the lewis structure as?
1. It has less than an octet on at least one atom. or 2. It has less
4 answers
asked by
James
1,483 views
If 10.6 mol of carbon monoxide is produced how many grams of carbon were used?
How do you convert moles to grams? And what are
3 answers
asked by
Helen
1,025 views
a 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp)
5 answers
asked by
Shanice
4,142 views
Write formation reactions for the following. (You must include the states of matter for each atom or compound)
A. Ca(NO3)2 (s) B.
4 answers
asked by
Bekah
7,164 views
C6H6(l) + Cl2(g) --> C6Cl6(s) + HCl(g)
Consider the unbalanced equation above. What is the maximum mass of each of the products
3 answers
asked by
Jade
750 views
A 2.80 -g sample of an unknown chlorofluorocarbon is decomposed and produces 557mL of chlorine gas at a pressure of 750mm Hg and
2 answers
asked by
James
505 views
Why must we add sodium bicarbonate (NaHCO3) to DCPIP/DPIP indicator (Dichlorophenol indophenol)when titrating juice for Vitamin
4 answers
asked by
Delphine
1,917 views
What is the ppm of standard Fe that is made by dissolving 0.1405g of reagent grade Fe(NH4)2(SO4)2 6H2O (FM 392.14 g/mol) in DI
1 answer
asked by
Mary
480 views
Calculate the molar concentration of acetic acid (CHcCOOH) in the vineagar sample using the average volume of NaOH.
Assume that
2 answers
asked by
Ivana
516 views
Calculate the number of moles of solute in 5.00 X 10^2 mL of 0.250 M HCl. Can you help me to set this problem up so that I can
4 answers
asked by
mysterylvr6
643 views
Calculate both [H30] and [OH-] for a solution that is:
pH=5.50 ph=7.00
3 answers
asked by
la
799 views
The previous questions that I submitted are still unclear to me as a plug and chug approach does not help me at all. Can you
3 answers
asked by
la
355 views
How many pounds of propane,C3H8, if you pay $20 for a 15L cylinder, filled to 150 psi at 25 degrees C.
1 answer
asked by
la
267 views
How many electrons in an atom can have each of the following quantum number or sublevel designations?
(a)n=2; l=1; m=0 (b)5s
2 answers
asked by
Kayla
644 views
Are my calculations correct of i came up with 50.71g of CaH2 to the question, "How many grams of are needed to generate 54.5 of
1 answer
asked by
Jena
340 views
So i been trying to solve this question like for ever! so i hope you guys can help me , here is the question :
the volume of a
3 answers
asked by
Tasneem
873 views
A 542-g piece of copper tubing is heated to 89.5 degrees Celcius and placed in an insulated vessel containing 159 g of water at
2 answers
asked by
Courtney May
603 views
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then
4 answers
asked by
Christian Gillard
2,783 views
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then
3 answers
asked by
Christian Gillard
666 views
A student placed 14.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then
2 answers
asked by
Christian Gillard
729 views
Calculate the heat of formation reaction for
SiO2(s)+4HF(g) --> SiF4(g)+2H2O(l) I got -129.6 and it says I'm wrong
3 answers
asked by
Kaylene
2,367 views
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is
3 answers
asked by
Jena
529 views
What is the pH of the following solutions?
1)a solution that is 5.4×10−2 M in HClO4 and 3.0×10−2 M in HCl 2)a solution that
5 answers
asked by
Katie
1,143 views
A mixture of He and O2 is placed in a 4.00L flask at 32 degrees Celsius. The partial pressure of the He is 2.7 atm and the
3 answers
asked by
Fernando
791 views
a solution contains .25M Ni(NO3)2 and .25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3?Assume that for
4 answers
asked by
Jim
2,607 views
I don't have an answer.
4 answers
asked by
Aaron
330 views
Amphetamine (C9H13N) is a weak base with a pKb of 4.2.
Calculate the pH of a solution containing an amphetamine concentration of
4 answers
asked by
Kyle
5,409 views
Given the following equilibrium constants,
Ka (NH4^+)=5.6*10^-10 Kb (NO2^-)=2.2*10^-11 Kw=1.00*10^-14 determine the equilibrium
3 answers
asked by
Katie
825 views
The boiling point of a liquid at atmospheric pressure is the temperature:
a. at which bubbles of vapor expand within the liqud b.
2 answers
asked by
Donna
652 views
A 0.05 molal aqueous solution boils at 373.102 K. What is the salt in question?
a. AlCl3 b. NaHSO3 c. MgCl2 d. NH4Cl e. NaCl I
3 answers
asked by
Donna
532 views
Part a: What mass of solid CuCL2 is required to prepare 450.0mL of 0.125M CuCl2 solution??
Part B: What are the concentrations of
3 answers
asked by
James
610 views
Using this equation: CH4(g)+2O2(g)---> CO2(g)+ 2H2O(l)
What is the value of Enthalpy( triangle H) if 15.00g of O2 is reacted??
2 answers
asked by
Anonymous
929 views
If 69.3g of magnesium chloride were produced from a process with a known yield of 78.3%, find the mass of carbon tetrachloride
3 answers
asked by
Bach
582 views
1) The concentration of the aluminum ion in a test solution is 0.10M. Using the Ksp for aluminum hydroxide (3. x 10^-34),
4 answers
asked by
Zach
1,222 views
HELP ME PLEASE!
1. Calculate the weight of 16.2L of pure SO2 gas at STP. (answer in grams) a.16.2 b.31.8 c.39.5 d.46.3 e.64.1 2.A
2 answers
asked by
Lynn
514 views
Quick Question - For a spontaneous reaction,
ΔS°>0 and K >1. Is this always?
1 answer
asked by
Whitney
399 views
I was asked to find delta Grxn for the equation I2+Cl2--->2ICl. Was given information to solve for Q (PICl= 2.55atm, PI2=0.315,
2 answers
asked by
Mel
538 views
A 30.00 mL volume of a weak acid, HA, (Ka = 3.8 x 10^-6) is titrated with 39.00 mL of 0.0958 M NaOH to the equivalence point.
A.)
2 answers
asked by
Shell
484 views
Consider the titration of 29.00 mL of aqueous ammonia with 18.70 mL of 0.1250 M HCl (aq). Kb for NH3 (aq) is 1.8 x 10^-5.
A.)
4 answers
asked by
MiShell
479 views
How do acids and bases react?
1 answer
asked by
James
399 views
Consider the evaporation of methanol at 25.0 C:
CH3OH(l)--->CH3OH(g) Delta G= 4.3 kJ Find Delta G at 25.0 C under the following
1 answer
asked by
Kyle
808 views
Calculate the electrode potential of a copper half-call containing 0.05M Cu(NO3).
E^0 Cu2+/Cu = 0.337 V
4 answers
asked by
L**
559 views
Calculate the electrode potential of a copper half-call containing 0.05M Cu(NO3).
E^0 Cu2+/Cu = 0.337 V College Chemistry -
4 answers
asked by
L**
584 views
explain why krypton can form compounds with other elements, but neon cannot
2 answers
asked by
Jim
548 views
In energy terms, ionization of an electron in an atom corresponds to the transition from whatever quantum state the electron is
3 answers
asked by
Bach
1,484 views
Does Vapor Pressure decrease as intermolecular forces increase???
4 answers
asked by
James
799 views
For a certain first-order reaction the rate constan is 2.9 s-1. what is the fraction of the reactant remaining after 4 half
4 answers
asked by
jahil
410 views
Sulfur trioxide is made from the reaction of sulfur dioxide and oxygen. how many grams of SO3 can be made from the reaction of
3 answers
asked by
James
1,864 views
Is 50.0mL of 1.0 MHF and 50.0 mL of 1.0M NaOH a buffer solution with a pH of 3?
3 answers
asked by
Bill
408 views
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm.
Find final
1 answer
asked by
nick
699 views
How do i calculate the pH when 200ml of .200M HCl is added .4998M of sodium acetate?
1 answer
asked by
Jim
388 views
How do i calculate the pH when 200ml of .200M HCl is added .4998M of sodium acetate?
4 answers
asked by
Jim
419 views
My professor gave us two homework questions that are a bit confusing, can you help me to get started on them.
1) You have 6g of
4 answers
asked by
Sarah
652 views
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it.
1 answer
asked by
Sarah
428 views
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it.
1 answer
asked by
Sarah
371 views
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it.
1 answer
asked by
Sarah
365 views
For my homework I got this problem that my professor never went over in class how to do it and I don't know how to interpret it.
1 answer
asked by
Michelle
309 views
Given 20 mL NaOH; 0.1 M, add 0.05 M HCl, 10 mL at a time.
What is the pH initially of NaOH? What is the pH after adding 10 mL
3 answers
asked by
Erika
612 views
Complete the following table for aqueous solutions of caffeine, C8H10O2N4.
Find: Molality Mass Percent Solvent Ppm Solute Given:
4 answers
asked by
James
2,271 views
This is my first time taking chemistry and I am VERY confused on the steps foe this problem! Kilocalories to condense 82g of
1 answer
asked by
Eric
479 views
If the water initially has a temperature of 28, how many kilojoules of heat must be removed to cool and freeze the water at 0?
1 answer
asked by
Becky
447 views
When two solutions are mixed, small bubbles are formed. Is that a chemical or physical change?
1 answer
asked by
Becky
341 views
When you bake cake batter it solidifies. Is this a physical or chemical change?
2 answers
asked by
Becky
575 views
If you leave a glass of tap water out long enough, the water will evaporate and leave behind a white solid.
3 answers
asked by
Becky
398 views
A plant grows. Is that a chemical or physical change?
3 answers
asked by
Becky
617 views
If you leave a glass of tap water out long enough, the water will evaporate and leave behind a white solid. Is this a chemical
2 answers
asked by
Becky
952 views
Phosphoric Acid is usually obtained at an 85% phosphoric acid solution, by mass. If this solution is 15 M, what is the density
4 answers
asked by
Tabatha
1,439 views
Which of the following changes generally lead to greater reaction rates?
(I)Increasing the temperature (II)Decreasing the
3 answers
asked by
James
576 views
Using the values for the heat of fusion, specific heat of water, or heat of vaporization, calculate the amount of heat energy in
4 answers
asked by
Kell
1,617 views
a)What is the theoretical yield for this reaction under the given conditions?
b)What is the percent yield for this reaction under
2 answers
asked by
Alex
583 views
Balance this equations for redox reactions in basic solution.
Fe(OH)3(s) + OCl- �¨ FeO42- + Cl-
5 answers
asked by
Marissa
7,756 views
Pages
1
2
3