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Chromium can be electroplated from an aqueous solution containing sulfuric acid and chromic acid, H2CrO4. What current is
1. 5 answers
2. asked by Sarah H
3. 2,022 views
A mixture of NaCl and sucrose (C12H22O11) of combined mass 10.2 g is dissolved in enough water to make up a 250 mL solution. The
1. 3 answers
2. asked by Brittany
3. 3,120 views
Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239-Np to decay to 1.00% of its original
1. 4 answers
2. asked by Sarah H
3. 5,053 views
The signs of DG, DH, and DS at 25°C are shown in the table below for three reactions.Reaction DG DH DS I - + + II - - + III - -
1. 3 answers
2. asked by Sarah H
3. 1,106 views
ignition of mgnh4po4*6h2o produces nh3, h2o and magnesium pyrophosphate, Mg2P2O7. complete and balance the equation for this
1. 4 answers
2. asked by Andrea
3. 4,141 views
What is the number of nucleons in 236-U2+?
1. 1 answer
2. asked by Sarah H
3. 302 views
Which provides the greatest increase in entropy for a mole of substance?a)Water melts at 0°C. b)Liquid water is heated from
1. 2 answers
2. asked by Sarah H
3. 587 views
Which of the following conditions MUST be true for the entropy of a pure solid to be zero?a) T must be 0 K b) The solid must be
1. 4 answers
2. asked by Sarah H
3. 647 views
n = 6 and E° = 0.011v for a redox reaction with Q = 7.03 x 10-1. Calculate E. Assume T = 298.15K.How do I set this equation up?
1. 1 answer
2. asked by Sarah H
3. 350 views
Consider the following reaction, A <===> B in a 1.00L container. At 1.77°C, the molar concentrations of A and B, respectively,
1. 1 answer
2. asked by Sarah H
3. 370 views
A current is passed through two cells connected in series. The half-reactions occurring at the cathode of each cell areTcO4-(aq)
1. 4 answers
2. asked by Sarah H
3. 639 views
What is n, the number of moles of electrons transferred, in the following reaction?2 MnO4-(aq) + 16 H+(aq) + 10 Cl-(aq) ===> 2
1. 6 answers
2. asked by Sarah H
3. 2,086 views
Consider a cell based on the following reaction:GeO(s) + H2O(l) + 2 Ag+(aq) ===> GeO2(s) + 2 H+(aq) + 2 Ag(s) If [Ag+] = 1 M, at
1. 2 answers
2. asked by Sarah H
3. 917 views
n = 6 and E° = 0.011v for a redox reaction with Q = 7.03 x 10-1. Calculate E. Assume T = 298.15K.So I did E=E°-(RT/nF)lnQ
1. 1 answer
2. asked by Sarah H
3. 368 views
If Q=.61259, what is the formula to convert to pQ? Is it pQ=lnQ?
1. 1 answer
2. asked by Sarah H
3. 300 views
A liquid is heated from 33.96°C to 104.32°C. The vapor pressure increases from 23.54torr to 984.35torr. What is the heat of
1. 2 answers
2. asked by Sarah H
3. 1,033 views
Consider the following reaction,A <===> B in a 1.00L container. At 1.77°C, the molar concentrations of A and B, respectively,
1. 1 answer
2. asked by Sarah H
3. 386 views
Can the rate of a nuclear reaction be changed by an increase of temperature?
1. 4 answers
2. asked by Sarah
3. 892 views
Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy
1. 3 answers
2. asked by Z
3. 659 views
Ok, how about this one? A solution contains ammonium ions and calcium along with some anions, how would you separate the
1. 1 answer
2. asked by Alex
3. 341 views
Barium has a radius of 224 pm and crystallizes in a body-centered cubic structure. What is the edge length of the unit cell?
1. 3 answers
2. asked by gagaga
3. 1,042 views
What are the net ionic equations for: 1. Potassium Fluoride and Ammonium Chloride and 2. Sodium Hydrogen Sulfite and Potassium
1. 1 answer
2. asked by Ann
3. 1,198 views
Consider the reaction: 2 SO2(g) + O2(g) ↔ 2 SO3(g). If, at equilibrium at a certain temperature, [SO2] = 1.50 M, [O2] = 0.120
1. 3 answers
2. asked by jon
3. 1,328 views
At elevated temperatures, solid silicon reacts with chlorine gas to form gaseous SiCl4. At some temperature, the equilibrium
1. 5 answers
2. asked by jon
3. 5,080 views
If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane
1. 4 answers
2. asked by Sam
3. 1,280 views
For my chem class I have 3 elements and have to find what they are used for today or an interesting fact. I have looked but I
1. 1 answer
2. asked by Andrea
3. 428 views
epsom salts, household ammonia, and rubbing alcohol are also consumer chemicals that could be used in this experiment. what are
1. 2 answers
2. asked by Andrea
3. 905 views
what is the formula weight for CuSO4 5H2O?
1. 4 answers
2. asked by Andrea
3. 367 views
In an experiment I used .139 grams of an Alka Selzter table. A question asks us to determine the amount of CO2 dissolved in
1. 1 answer
2. asked by Jessica
3. 304 views
Predict products and balance equations for the reactants shown.Pb 2+(aq) + H2PO4 1-(aq)--->? Pb 2+(aq) + HPO4 2-(aq)--->? Pb
1. 1 answer
2. asked by Alex
3. 363 views
Knowing the MW of salicylic acid (138.12g/mol), design a procedure to make 100mL of a 0.0050M salicylic acid solution.
1. 3 answers
2. asked by Scott
3. 639 views

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