Which of the following Ka values represents the weakest acid

A: Ka=1.82x10^-1

B: Ka=3.24x10^-7

C: Ka=1.29x10^-4

D: Ka=1.62x10^-12

If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? H2 + 0.5 O2 H2O, H = - 286 kJ

what is the pressure of oxygen gas that is collected over water at 25 degrees celcius at an atmostpheric pressure of 800 mmKg?

Any naturally occurring, inorganic, crystalline substance with a fairly definite chemical composition is called a

How does deforestation (cutting trees down), affect carbon dioxide levels in the atmosphere? A. Trees have no effect on carbon dioxide in the air. B.

Chlorine atoms each have 17 protons. How many neutrons does each Cl-37 atom have? A. 17 B. 20 C. 37 D. 54 This stuff is hard ...

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)

Increasing the temperature of a liquid-solid solution will:

What is the most abundant substance dissolved in sea water? magnesium chloride sodium chloride

Problem 5.32 - enhanced - with feedback the rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. suppose a 180,000 kg locomotive is rolling at 22 m/s on level rails.

Gina made a poster for plastic recycling week and included this information on her poster: What corrections should Gina make? Check all that apply. Gina should put "cellulose" under "Synthetic." Gina should put "plastic" under "Natural.