A 250.0-mL sample of ammonia, NH3(g), exerts a pressure of 833 torr at 42.4°C. What mass of ammonia is in the container?

Collision between particles of gas are elastic.

Determine the oxidation state of chlorine in KClO4.

MATCHING EXERCISE – Measurement and Problem Solving

Reaction stoichiometry is important because we often want to know the numerical relationship between the ________________ in a chemical reaction.

FILL IN THE BLANK _______ of a given element have unique properties that distinguish them form _______ of other elements; and _______ combine in simple, whole-number rations to form compounds.

The chemical composition of compounds is important because it lets us ________________.

Which of the following statements are incorrect?

Mixture of 1.20 moles of helium, 2.10 moles nitrogen and 46.0 g of argon in closed container exerts pressure of 1.7 atm. What is partial pressure of helium in this container?

What part of the brain is shown in this diagram?