General Chemistry Answers

A 1.000L flask is filled with 1.000mol of H2(g) and 2.000mol of I2(g) at 448°C. The value of the equilibrium constant at 448°C is Kc = 50.5 for the reaction    

H2(g) + I2(g) ⇆ 2HI(g)

What are the equilibrium concentrations of H2, I2 and HI in moles per liter?

While Tc-99m has a half-life of 6.01 hours, its decay product has a half-life of 213,000 years.  While the medical community considers it to be reasonably safe, within the limits of testing, does this make sense considering both chemical and biological principles?

When sodium metals reacts with iron(II) chloride, iron metal and sodium chloride are formed.

5. A solution of 10g of sodium chloride (NaCl) is added to 100g water (H2O) in an attempt to elevate the boiling point. What is the boiling point of the solution? kb of water is 0.51°C/m.

If 15 mL of alcohol is added to 50 mL of water,what is the concentration of the solution?

You are given an aqueous solution containing similar concentrations of both calcium ions (Ca2+) and lead(II) ions (Pb2+), and you wish to selectively precipitate out the lead(II) ions only. Which of the following sodium salts would you choose in order to accomplish this selective precipitation?

What is Cristal

pure oxygen boils at -183 degrees celcius and freezes at -219 degress celcius, what state will the oxygen be in if the temp is brought to within 50 K of abosloute zero

Which is the reducing agent? for Ta

2

O

5

+10Na→2Ta+5Na

2

O

The first three half live of a chemical reaction are as follows 44 min, 22 min, 11 min what is the value of the rate constant if [A]0 =0.35 M ? *