I need help with these questions for chem

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

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

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.