Gastric juices have a pH of 1 or 2. This would indicate which of the following?
numerous OH- ions and a high pH
numerous OH- ions and a low pH
neutral fluids, perfect for decomposition reactions
numerous H+ ions and a low pH

numerous H+ ions and a low pH.

Explanation:

pH is defined as the negative logarithm of the reciprocal of the hydrogen ion activity, H+ in a solution. It is also a measure of the acidity and basicity of a solution.

Acids dissociate in aqueous solution to give H+.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.