1) Cr2O7^2- (aq) + NO2^-(aq) -> Cr^3+(aq) + NO3^-(aq)

Whats the coefficient of water after balancing redox rxn, which in acidic solution?

2) Which solution will increase molar solubility of CuCO3 (Ksp=2.3*10^-10) at 298K? (Ksp of Cu(OH)2 is 2.2*10^-20)

HCl, NaOH, Na2CO3

I seriously have no idea with this problem please explain with details thank you so much

If theres saturated aqueous solution of Fe(OH)2 at 25°C and Ksp = 4.87 × 10−17, which one is false statement?

A. Adding acid to the solution will increase the solubility.

B. Fe(OH)2 is a strong electrolyte.

C. The pH of the solution will be greater than 7.

D. The solubility of the salt will be equal to [OH−].

E. Addition of more solid Fe(OH)2 to the solution will increase the hydroxide ion concentration.

Whats pH of saturated solution of Mg(OH)2? (Ksp is 1.2 *10^-11)

1. Part A) Write the intact-compound equation for the neutralization of aqueous hydrofluoric acid by aqueous calcium hydroxide. Express your answer as a chemical equation. Identify all of the phases in your answer.

2. Part B) Write the net ionic equation for the neutralization of aqueous hydrofluoric acid by aqueous calcium hydroxide.

Express your answer as a ionic equation. Identify all of the phases in your answer.

3. Part C) What is the name of the salt that forms?

Spell out the full name of the compound.

Can I someone explain this I don't understand it.

Draw a flow diagram for the separation of benzoic acid, phenol, and naphthalene. Enough detail must be included for someone to perform the experiment, however, you do not need to include masses or volumes

( this question pertains to acid/base extractions, ect. ) Please be neat, as I seek guidance and mastery, thank you.

85. A fuel mixture used in the early days of rocketry consisted of two liquids, hydrazine (N2H4) and dinitrogen tetroxide (N2O4), which ignite on contact to form nitrogen gas and water vapor.

a. How many grams of nitrogen gas form when 1.00 x 102 g of N2H4 and 2.00 x 102 g of N2O4 are mixed?

b. Write a reaction table for this process.

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 22.0 mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L.

While in Europe, if you drive 107 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 28.0 mi/gal ? Assume that 1euro=1.26dollars.

A sprinter set a high school record in track and field, running 200.0 m in 20.8 s . What is the average speed of the sprinter in kilometers per hour?

A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece. How many kilograms of dietary fat are in a box containing 4.00 lb of candy?

Calculate the pH of the solution that results from each of the following mixtures:

A) 55.0 mL of 0.16 M HCHO2 with 75.0mL of 0.13M NaCHO2

B) 130.0mL of 0.11 M NH3 with 260.0 mL of 0.11 M NH4Cl

Please answer and explain. Thank you. (Biochemistry)

The water molecule is unique among the hydrides among the second period elements, C,N, O and F. CH4 and HF are all gases. Water alone is not a gas at room temperature. Explain why this molecule of similar mass to the others is a liquid.

The purification technique of electrophoresis relies on two properties of proteins. Name these properties and how biochemists take advantage of them in this method.

Draw the following peptide and indicate whether it is polar or non-polar. Ala-Gly-Val-Ile-Phe-Ile-Val-. How many chiral centers are in the peptide?

If you were able to produce nanocrystalline powders of FeTi of 10 nm crystallite size, for incorporating into the ferrite, what would be the peak width for the 100% peak in the X-ray diffraction pattern of this compound?

1. A calcite sample yields the following data for the determination of calcium as Calcium Oxide (CaO): 55.95, 56.00, 56.04, 56.08, and 56.23. Should we reject 56.23 with 95% confidence?

Calculate the molality, molarity,and mole fraction of NH₃ in an 14.60 mass % aqueous solution (d = 0.9651g/mL)

Use the current-voltage equation for the Na+ and K+ currents to derive the GHK equation for the reversal potential for a channel permeable to both Na+ and K+.

#16.98 Calculate the solubility (in grams per 1.00×102mL of solution) of magnesium hydroxide in a solution buffered at pH = 12. g/(1.00×102mL)

B) How does this compare to the solubility of Mg(OH)2 in pure water?

1. Which reagent would be best for converting D-fructose to D-mannitol?

2. What determines whether or not a sugar is reducing?

Answer and explain:

5. True or False: The entropy of mixing perfect gases is always positive.

6. True or False: The chemical potential of pure liquid water at standard conditions is higher than the standard chemical potential of liquid water in an aqueous solution