Why are elements sometimes called pure

What is another word for kinetic energy? A. freezing B. solid C. Temperature D. melting

Which of the following is not a fossil fuel? Coal. Wood. Natural gas. Oil.

Name one object that would be considered a gas. Describe how the atoms move in a gas.

H2O (g) + Cl2O (g) ↔ 2 HOCl (g) (a) Initially, 0.0555 mol H2O and 0.0230 mol Cl2O are mixed in a 1.00 L flask. At equilibrium, there is found to be 0.0200 mol of HOCl (g). Calculate the concentrations of H2O (g) and Cl2O (g) at equilibrium.

Na and Mg ions each have ten electrons surrounding their nuclei. which ion would you expect to have the larger radius? Explain your answer

a solid x when heated gives up a brown gas. If x is soluble in excess sodium hydroxide solution but insoluble in excess ammonium hydroxide solition. What is X?

What type of mixture is salad dressing

True or false: A gene is a form of an allele.

159 l of hydrogen gas reacts with excess chlorine gas. what is the maximum amount of gas product that can be formed at stp

You and your friends are at the park on a sunny day, and you are playing on the slide. As you sold down, the hot slide burns your legs. Explian why this happened and why you didn't burn your hands when you climbed up the rope ladder