What are the four phases of matter?

According to the pattern of carbon and hydrogen atoms in alkenes, if a molecule has three carbon atoms, how many hydrogen atoms does it have?

Would you expect hydrogen chloride to be a gas, liquid, or a solid at room temp and pressure? explain your answer (its a 3 mark so dont explain it that much)

Given that Rubidium has two isotopes, 85Rb and 87Rb. Calculate the average atomic mass of rubidium. Note that 85Rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17% while 87Rb has an atomic mass of 86.

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of H2O (g). C2H4 (g) + H2O (g) ⇌ C2H5OH (g) Kc = 9.0 * 103 [C2H4]eq = 0.015 M [C2H5OH]eq = 1.

How does vibrational energy contribute to a reaction?

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

Which of these measurements could be the pressure of a gas? O 725K 725 mmHg 725 grams 725 meters

Propane gas (C3H8) is combusted at a constant temperature and pressure. If 34.35L of propane react, what volume of oxygen is required? What volume of carbon dioxide is produced?

How is an organism related to a population?

The anion formed from an oxygen atom is called a (n) a. oxygen ion. c. carbon dioxide. b. oxide ion. d. nitrous oxide.