10/09/19

How do you calculate the volume of 30.0% (w/w) H2O2 needed to prepare 25.0 mL of a 3.6 M hydrogen peroxide solution?
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10/09/19

Suppose you want to prepare a solution of 2.50 L of 1.00 M HCl solution from concentrated 12.0 M HCl (aq). How many liters of concentrated acid is needed and how many liters of water is added?
Already know the liters of concentrated acid needed. Trying to find the volume of water added.
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10/09/19

Anode vs Cathode
If I have a lead electrode and a carbon electrode, which is the anode and which is the cathode?
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10/08/19

Calculate the volume of 6.83×10-2 M barium hydroxide required to neutralize 14.8 mL of a 0.274 M hydroiodic acid solution.
Please help with this problem. Can you also provide a step-by-step way of solving it?
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10/08/19

Calculate the volume (in mL) of 0.416 M HNO3 needed to react completely with 8.18 g of ZnCO3 in a gas-forming reaction?

I don't understand how to solve this. Please help me with this problem.
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10/08/19

Synthesis of Aspirin

A student carries out the experiment using 3.00g of salicylic acid and an excess of acetic anhydride. If this is the case, what is the limiting reactant? 2. The student from #1 collected... more
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10/07/19

Find the Ka of the reaction
What is the Ka reaction of HCN? The ka of HCN is 6.2 x 10^-10. I thought that the answer was exactly as the question said: 6.2 x 10^-10, but I am not sure why it is wrong.
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10/07/19

100mL of a solution (an unknown monoprotic acid) is titrated with 0.250 M KOH.The titration requires 32.70 mL of the KOH to reach the equivalence.What's the molar concentration of the acid?
Suppose100.0 mL of an aqueous solution containing an unknownmonoprotic acid(called HA)is titrated with 0.250M KOH. The titration requires 32.70mL of the potassiumhydroxideto reach the equivalence... more
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10/07/19

Find the equilibrium concentration of H2A in this solution.
For the diprotic weak acid H2A, ka1=2.9 x 10^-6 and ka2= 6.7 x 10^-9. There is a pH of a 0.0550 M solution of H2A. What is the equilibrium concentration of H2A in this solution?
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10/07/19

Neutralization Reaction
Write the balanced neutralization reaction that occurs between H2SO4 and KOH in aqueous solution. Phases are optional. neutralization reaction:Suppose 0.750 L of 0.480 M H2SO4 is mixed... more
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10/07/19

Find the pH and H2A of a solution
For the diprotic weak acid H2A,  Ka1= 2.9 x 10^-6 and Ka2=6.7 x 10^-9.What is the pH of a 0.0550 M solution of H2A?Find pH and H2A
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10/07/19

Redox titration - calculating the molarity of the unknown
If 28.00 mL of a KMnO4 solution was used to titrate 25.00 mL of a Na2C2O4 solution made by dissolving 1.02 g of sodium oxalate in 250.0 mL of water, what is the molarity of the potassium permanganate? more
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10/07/19

Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) and KCl(aq). Refer to the solubility rules as needed.

I need help finding the net ionic equation:
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10/06/19

Given that Kp at 900 K is K = 16, calculate the equilibrium pressure of HCl
In the reaction below, 5 atm of H2 and 6 atm of Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) <=> 2 HCl(g) Given that Kp at 900 K is K = 16, calculate the... more
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10/05/19

9B. In the gaseous reaction between ammonia, oxygen gas, and methane, hydrogen cyanide and water are produced. Ideally, what mass of each product is yielded if you start with 600. g of each reactant?
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10/05/19

If a mole of hydrogen reacts with a mole of oxygen to produce water, what is the excess reactant?
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10/04/19

If you have 3.51 x 1049 N2 molecules, how many grams of N2 do you have?
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10/04/19

Which atomic orbital is found on every energy level
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10/04/19

Molar concentration

What is the concentration in mol dm3 for:Sulphuric acid, in which 750cm3 contains 1.5 molH2SO4?
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10/04/19

how many molecules are in 23 miles of oxygen

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10/04/19

how many molecules are 25 grams of NH3

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10/04/19

how many grams are in 8.2 x 10^22 molecules of N2I6
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10/03/19

Laws of Gas in Chemistry
What is the temperature in °C, when a piston reduces a volume of 350 mL of NO2 gas at 36°C to 150 mL at a constant pressure?   What is the new pressure of CO2 in atm, when a 10 mL container is... more
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10/03/19

Morality and Mass percent of Vinegar

A 10.00 -mL sample of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with .5073M NaOH, and 17.64 mL is required to reach the equivalence point.What is the molarity of the acetic... more
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10/03/19

how many grams are in 4.5 moles of LI2O
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