A sample of oxygen gas has a pressure of 440 mmHg. When the pressure is increased to standard pressure, the volume decreases to 1500. mL. If the temperature remains constant, what was the original volume?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.

What is dhmo? hint: you find it everywhere something is wet..