Formula to find mass percent of an element

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

Consider the story you just read. all but one of the choices below indicate that something is living.

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?