Ascuba diver's air tank contains oxygen, helium, and nitrogen at a total pressure of 205 atmospheres. the partial pressure of nitrogen is 143 atmospheres, and the partial pressure of helium is 41 atmospheres. what is the partial pressure of oxygen in the tank?

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Why do lunar and solar eclipse not happen every month