How many liters of space will 2.5 mol of O₃ gas take up at STP? (round to 2 sig figs)

= (a)   L of O₃

How many molecules are in 54.3 L of NO₂ gas at STP?

(round your answer to 3 sig figs)

= (a)   x 10²⁴ molecules NO₂

Find the mass of 3.68 x 10²⁵ molecules of NO₂ gas at STP.

(round your answer to the nearest whole number)

= (a)   g of NO₂ gas

How many liters are in 1.35 x 10²⁶ molecules of NH₃ gas at STP? (round your answer to the nearest whole number)

= (a)   L NH₃

How many Oxygen atoms are in a 60.0 L sample of N₂O₄ gas at STP?

(round your answer to 3 sig figs)

= (a)   x 10²⁴ Oxygen atoms

Find the density of P₂O₅ gas at STP. (round your answer to the tenth's place)

= (a)   g/L

Calculate the density of O₂ gas at STP.

(round your answer to the tenth's place)

= (a)   g/L

Calculate the density of Cl₂ gas at STP.

(round your answer to the tenth's place)

= (a)   g/L

A gaseous oxide of chlorine has a density of 3.013 g/L at STP. What is the molar mass of this gas?

(round your answer to 4 sig figs)

= (a)   g/mol

A mystery gas has a density of 1.696 g/L at STP. What is the molar mass of this mystery gas?

(round your answer to 4 sig figs)

= (a)   g/mol