Carefully add HNO into the flask until the phenolphthalein begins to lose its color. Stop adding HNO3 when the color change is permanent.

A. How much (HNO3) was required to cause the indicator to change color?

B. What can you say about the pH before and after the last drop of HNO3 was added?

answer; blank (1); /// (2)///(3)///highblank(4)//low;

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.

catya that's not even a b or c