1. When 0.4 g of impure zinc reacted with an excess of hydrochloric acid, 132 mL of hydrogen was collected over water at 10◦C. The external pressure was 786.6 Torr. What volume
would the dry hydrogen occupy at 1 atm and
298 K?

Answer in Liters

2. What amount of H2 was collected?
Answer in units of mol.

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