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?

They did not study the continental drift

I’m guessing you’re more alert to yourself or your surroundings if you’re more concentrated

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.