Mr Smith is walking his dog. He walks for 5 minutes (300 seconds) at a speed of 1.5 m/s. His dog runs at a speed of 5 m/s for the same time.

a How far does Mr Smith walk? b How far does the dog run?

You make the following measurements of an object - 22 kg and 42 m3. What would the object's density be? Show your work for credit and include final units.

3. Which is the minimum amount of energy required to start a chemical reaction? A endothermic energy B chemical energy C activation energy OD exothermic energy

Why is it important to have a control group in an experimental investigation? to show what happens when the dependent variable is not changed to see how the dependent variable changes the independent variable to compare the results when the

What is the volume of 3.89 grams of helium gas?

An ionic compound has a very positive heat of solution in water. Would you expect it to be very soluble or insoluble in water?

A piece of solid carbon dioxide, with a mass of 21.0 g, is placed in an otherwise empty 4.60 L container at 25°C. What is the pressure in the container after all the carbon dioxide vaporizes?

What is the volume of 1 mile of gas at a standard temperature and pressure

Next to each formula, write the number of atoms of each element found in one unit of the compound

A particular atom has 58 protons and 82 neutrons. what are the atomic number, mass number, and periodic table symbol of this isotope?

Chemicals that are able to reduce activation energy in a reaction and speed the reaction rate are a. inhibitors. b. reactants. c. products. d. catalysts.