described atoms as having a positive with electrons that have different energies at different distance from the nucleus

Explain why atoms move at different speeds depending on whether they are in liquid or solid

List three factors that affect reaction rates.

How many molecules of sulfur trioxide are present in 1.87 moles of this compound?

If 25 mls of 0.01 M NaOH is added to 75 mls of 0.005 HCl, what is the resulting pH

The theoretical yield of ammonia in an industrial synthesis was 550 kg, but only 480 kg was obtained. What was the percentage yield of the reaction?

What is a compound? a) a combination of two or more substances that are not chemically combined b) a combination of two or more elements that are combined in a certain ratio

A gas has a volume of 75mL at a pressure of 200.0 kPa. What will be the new volume be in mL if the pressure is decreased to 60.0 kPa in sig figs

Give two reasons why it's important to work with a partner in a lab

Suppose you have 3.00*1018 reams of lead (pb). how many lead atoms do you have? express the number of atoms numerically.

Why is a chemical indicator added to the flask in which a titration will occur? to show when enough base has been added to determine the starting pH of the solution to neutralize the acid before adding the base to identify the starting volume of