Multiple ChoiceWhich gas is more dense at standard temperature and pressure (STP), sulfur hexafluoride (SF_6) or helium (He), and what evidence supports your answer?65views
Multiple ChoiceWhat is the density of NH_3 gas at 435 K and 1.00 atm? (Use R = 0.0821 L·atm·mol^{-1}·K^{-1} and molar mass of NH_3 = 17.0 g/mol.)50views
Multiple ChoiceWhat is the density of NO_2 gas in a 4.50 L tank at 760.0 torr and 25.0 °C? (Express your answer in g/L.)41views
Multiple ChoiceIf you have 20 mL of pure water at room temperature, what is its mass in grams?44views
Multiple ChoiceWhich of the following methods can be used to determine the density of an object?40views
Multiple ChoiceWhat is the length of the side (in cm) of a cube that has a density of 12.6 g/ml and a mass of 7.65 g?50views
Multiple ChoiceA liquid in the lab has a density of 1.17 g/cm^3. Which of the following statements is true if you pour this liquid into a container of water (density = 1.00 g/cm^3)?89views