Why are hydrogen and helium liquid on the outer planets?

When burning methane gas, which outcome best demonstrates the law of conservation of mass? A. CH4 → CO2 + H20 B. CH4 + O2→ CO2 + 2H20 C. CH4 + O2 → 2CO2 + 2H20 D. CH4 + 2O2 → CO2 + 2H20

What will happen to the gas pressure as the temperature increases, if the amount and volume of the gas are kept constant?

In the chemical symbol for nitrogen gas, N2, what does the "2" represent?

What energy source is used to produce most of the electricity we use today?

Name these Ionic Compounds a. LiCl b. NaCl c. KBr

A reaction is in equilibrium as shown: a + b c + d. calculate the equilibrium constant if the final concentrations stabilize at: a = 9.60 m b = 10.0 m c = 4.00 m d = 4.00 m 0.167 0.408 2.45 5.99

When 10 liters of a gas at 1 atm is compressed to 3 liters at constant temperature, what property of the gas changes?

What happens to the particles of a substance when thermal energy is added to the substance? A.) it's particles do not vibrate at all. B.) it's particles move faster. C.) it's particles move closer together. D.). It's particles move slower.

Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, and which sink? density of styrofoam: 0.005 density of gold ring: 19.32 density of oak: 0.70

How many molecules following formula 3Al2 (SO4) 3