Which of the following is not one of Aristotle’s four elements?

Which state of matter has the lowest density?

A rigid ball that contained air at 22 °C and 6.25 atm pressure was placed in an oven at a temperature of What was the new pressure inside the ball?

___________ is the occasional occurrence when a gas turns directly into a solid without turning into a liquid first.

A 10.0 liter balloon was taken from a temperature of 25.0 °C and placed in a freezer at a temperature of What was the new volume if pressure is constant?

How many H atoms are in 6.022 × 1023 molecules of water?

Chemical elements like carbon, oxygen, and nitrogen are considered _____.

If a 0.640 g sample of O2 has a volume of 2.46 L and a temperature of 30. °C, the pressure will be ________ atm.

If atmospheric pressure on a certain day is 749 mmHg, what is the partial pressure of nitrogen, given that nitrogen is about 78% of the atmosphere? (1atm=760mmHg)

Which of the following is a chemical property of iron?