What do you expect the pH of a soil sample to be that has a large ...

[shofmannx20]

What do you expect the pH of a soil sample to be that has a large amount of humus in it?
 
  A) low pH
  B) high pH
  C) negative pH
  D) neutral pH
  E) Humus has no effect on pH.

Question 2

Given that the bond energy of N2 is 946 kJ/mole, the bond energy of O2 is 498 kJ/mole and the NO bond energy is 631 kJ/mole, how much energy is required to react 1 mole of nitrogen molecules according to the following reaction? N2 + O2  2 NO
 
  A) 182 kJ
  B) -182 kJ
  C) 813 kJ
  D) -813 kJ
  E) 2075 kJ

Question 3

A sealed plastic bottle is filled with enough sand so that the bottle floats just beneath the surface in ocean water. Some sand is then removed and the bottle is then placed in some fresh water where it floats just beneath the surface.
 
  What is true about the amount of sand that was removed from the bottle? A) The mass of sand removed divided by the volume of the original plastic bottle equals the density of the ocean water.
  B) The mass of the sand removed divided by the mass of the sand remaining in the plastic bottle is the same ratio as the density of fresh water to the density of ocean water.
  C) The amount of sand removed from the plastic bottle equals the amount of salt dissolved in the ocean water.
  D) The mass of the sand removed multiplied by the density of ocean water equals the volume of the plastic bottle.

[vish98]

Answer to Question 1

A

Answer to Question 2

A

Answer to Question 3

C

[shofmannx20]

Thanks

[vish98]

Welcome