04/16/18

How many grams of solid potassium chloride is needed to prepare 250 mL to 0.235M solution
Need help please
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04/16/18

Calculate the number of moles of zinc chloride in 100mL of 0.300 M solution
I need help please  
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04/16/18

what is double-blinded test
I need help with this question
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04/15/18

What causes vitamin C concentration to increase in freshly squeezed orange juice?
Hi. In year 13 Chemistry we titrated an iodine solution with freshly squeezed orange juice which had been stored at different temperatures. We keep the orange juice solution in an incubator to... more
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04/15/18

How do I solve this problem on the concentration of fluorine
If a constant  [F-] is maintained in a solution in which the initial  [Ca2+ ] =0.038M, what percentage of Ca 2+ will remain in solution after the CaF2 precipitate. What [F-] should be maintained to... more
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04/15/18

How do I solve this AP Chemistry problem on silver and bromine
Silver ion and bromine ion precipitate into AgBr (s). The Ag+ concentration is about 0.065M. If the Br- concentration remains at 1.0×10^17M. What will be the remaining concentration of  Ag+ when... more
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04/15/18

If 2.15 moles of an ideal gas occupies 42.3 liters at a pressure of 101.9 kPa, what is the temperature of the gas? Report your answer in C.
I need help on this question. It is very confusing to me. 
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04/14/18

How do I solve this problem on potassium chromate?
A concentrated solution of potassium chromate is added to a solution that is 0.1M Ba 2+ and 0.1M Sr 2+. Which ion will precipitate first? What is the percentage of ion remaining when the other ion... more
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04/14/18

The solubility of AlF3 (s) in 1.5M OH-(aq)=2.0×10^-4 mol/L
Given that the Ksp of AlF3 is 3.7×10^-9. What is the value of Kf for Al (OH)3?
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04/14/18

Which of the following solids are more soluble in an acidic solution than in pure water?
NaCl, Fe (OH)2, CaF2, ZnCO3, or C5H4CO2H?
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04/14/18

The solubility of Ba (OH)2 in a particular solution is 0.5 g/L. What is the pHone of the buffer solution?
The Ksp is 5.0×10^-3
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04/14/18

0.01M Cu+ and 0.01M Ag+ are in solution. A piece of solid NaI is put inside. What is the concentration of Ag+ as soon as the CuI begins to precipitate?
0.01M Cu+ and 0.01M Ag+ are in solution. A piece of solid NaI is put inside. What is the concentration of Ag+ as soon as the CuI begins to precipitate?
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04/14/18

net ionic equation for aqueous solutions of ammonium nitrate + sodium carbonate
Can't figure it out! Please provide the balanced net ionic equation including the phases if you can.
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04/14/18

Net ionic equation for aqueous solutions of manganese(II)nitrate+ammonium sulfate
Can't figure it out! Please provide the balanced net ionic equation including the phases if you can.
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04/14/18

net ionic equation for aqueous solutions of ammonium nitrate+sodium carbonate
I can't figure this out. Please provide the balanced net ionic equation along with the phases in the answer if you can. 
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04/14/18

what is the mass of co and co2 containing as much as oxygen as present in 188 g of k2o
a chemistry question based on mole concept ................................  
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04/14/18

does this method wuitble for determine solubilty product constant
Does the acid-base titration seem a suitable method for determining a solubility product constant? Answer this question by briefly commenting on the differences observed between your experimental... more
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04/13/18

Calculate half life when given half life at a different temperature, and the activation energy
the half life of a first order reaction at 283.15 kelvin is 2.5 minutes. The activation energy is 66.0 kJ/mol. Calculate the half life or the reaction at 298.15 kelvin.
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04/13/18

A reaction uses 528 g of CO2. How many moles of water are used in this reaction?
 The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?
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04/13/18

redox half-reation question
S4O62- → 2S2O32- Will this redox half-reaction will be balanced if you add 2 electrons to the product side?
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04/13/18

is a special kind of diffusion that water undergoes
biology helps me  
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04/13/18

4NH3+5O2=4NO+6H2O which reaction is this?
I want to know how can we find out chemical reactions
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04/13/18

how to reduce solution that could be trapped in the pores of the filter paper for example aspirin
I need help
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04/13/18

reason of turn the solution to mulky durint titration process
Why does the solution containing the oxalic acid turn milky white during the course of the titration with calcium hydroxide?
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04/13/18

Ca(OH)2 + H2C2O4*2H2O = CaC2O4 + 4H2O
what is the net ionic equation of this reaction Ca(OH)2 + H2C2O4*2H2O = CaC2O4 + 4H2O
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