bond

Pls see attached

Chromate/Dichromate Equilibrium

Can you explain fully what happens when H+ is added to a mixture containing BaCrO4(s)and CrO4(aq)ions?What about when HCl and NaOH are added on top to change the colour and form a precipitate?

Total Gas Pressure

For the reaction 2NaHCO3=Na2CO3+CO2+H20 a 5.00 gram sample of NaHCO3 is placed in an evacuated flask and the temperature is increased to 50 degrees celcius. What is the Total Gas Pressure in the flask at equilibrium? Kp=3.90 X 10-4 = (PCO2)(PH2O.)

Calculate [H+], [HA] and [H2A] for a weak dibasic acid

Calculate [H+], [HA] and [H2A] for a 0.1M solution of the weak dibasic acid H2A. Given: H2A=H+ + HA- Ka1=2.0 X 10-5 HA- = H+ + HA- Ka2=1.00 X 10-12

Identify salt's acidity in water

Which one of the following salts is acidic in water? Subscript represented by () CaCO(3) Na(3)PO(4) KF KHSO(4) LiBr

Calculate half life

A 10.0 g sample of uranium-27 (u-237) undergoes beta decayy. After 27.0 d, 0.625 g of U-237 remains. Calculate the half-life of u-237. Please show me each step in the calculations. Thanks.

Diagram of how to prepare dry hydrogen selenide

see attachment

Diagram, producing hydrogen selenide

see attached Hydrogen selenide can be prepared by the reaction of aluminium selenide with water, the other product being solid aluminium hydroxide, Al(OH)3. At STP hydrogen selenide gas has a density of 3.61g litre –1. Draw a diagram of how to prepare a jar of dry hydrogen selenide, from the reaction between aluminium sel ...continues

Find the net total charge of a protein at pH7 and pH2

What is the net total charge on the following protein at pH7 and at pH2? Two answers Lys-Glu-Phe-Lys

Product solubility

The solubility product of Ca(OH)2,is 7.9x10^-3 at 25C. Will a precipitate form when 100ml of 0.10 mol/L of CaCl2 solution and 50.0 ml of 0.070 mol/L of NaOH solution are combined? Please show all your work and explain the steps!