Cause of iron changing to rust when it reacts with water

In 2002, the rare earth elements mine in mountain pass, california was closed because

What is the percentage of hydrogen in nitrogen trihydride

Calculate the estimated 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 estimated density of the table tennis ball? record your answer to the nearest hundredth