Which of the following is a physical change for the compound sucrose (sugar)?

Breaking water up by separating it into hydrogen and oxygen is an example of a ______.

Which state of matter do not hold their own shape and can fill a container of any shape or size. This state of matter also has very high movement of its atoms and/or molecules.

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

Which state of matter do not hold their own shape and can fill a container of any shape or size. This state of matter also has very high movement of its atoms and/or molecules.

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

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?

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.

At 35 °C, the volume of a sample of air is 675 mL At what temperature (°C) will the volume become if the pressure remains constant?