A 5.0 gallon container contains 15.0 moles of propane gas at room temperature (20. °c). what is the pressure of the gas? (1.0 gal = 3.79 l)

6.02 x 1022 molecules of HCl (molecular weight = 36.5 g/mole) in 2.0 liters of water

1. What are the three ways that heat can be transferred? a) Absorption convection, and thermation b) Conduction, convection, and radiation c) Absorption, convention, and radiation d) Conduction, absorption, and radiation

How many neutrons are in Uranium-242?

The system by which organisms get and give energy is

Where are protons neutrons and electrons found in an atom?

Why is haemoglobin a pure substance

The measurement of how fast an object moves over a certain amount of time. A:Velocity B:Speed C:Acceleration D:Displacement

At 25C, K = 0.090 for the reaction:H2O (g) + Cl2O (g) 2HOCl (g) Calculate the concentrations of all species at equilibrium for eachof the following cases: (a) 1.0g H2O and 2.0g Cl2O are mixed in a1.0-L flask. (b) 1.0 mol pure HOCl is placed in a 2.

Which of the following is the largest volume? 1.2 x 101 m3 1.2 x 108 cm3 2.0 x 104 dm3 1.2 x 108 mm3

Many substances can go through physical and chemical changes. Which of the following is an example of a physical change?