What is the density of a sample of chlorine gas that exerts a pressure of 4.5 atm in a 12.6 L container at 36 c (Answer in 4 digits)

Please help I'm so confused!

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

98 ! and brainliest plz ! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?