A sample of (NH4)2SO4 contains 0.750 mole. what is the mass of the sample

Which of these conditions most likely produces an unstable isotope?

When a septic tank backs up a goes in to clean it out

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