What is the density of the table tennis ball? Record your answer to the nearest hundredth.
g/cm3
Calculate the density of each ball. Use the formula
D= m/V
where D is the density, m is the mass, and V is the
volume. Record your calculations in Table A of your
Student Guide
Given that the density of water is 1.0 g/cm3, make a
prediction about whether each ball will float in water.
Record your prediction in Table A.
What is the density of the golf ball? Record your
answer to the nearest hundredth.
g/cm3

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.