Subscript appears outside of the parentheses. When a subscript appears outside of the parentheses, it indicates that all of the elements inside the parentheses should be multiplied by that subscript. For example, the formulas for the compound Ca(NO3), indicates that there is one calcium atom, two nitrogen atoms, and six oxygen atoms.

1. Define reactant

2. Define product

3. What does the arrow mean in an equation?

4. What is the Law of Conservation of Matter?
atoms of hydrogen

5. If there are 6 atoms of hydrogen in the reactants then there must be
in the products.

6. What 2 things does a chemical formula tell you?

Aaspirin has a density of 1.40 g/cm^3 what is the volume in cubic centimeters of a tablet weighing 320 mg?

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.