Helium has an atomic number of 2 and atomic mass of 4. explain.

What effect does salt have on most metals?

Match each career with the academic requirement for the job.

An organic compound has the empirical formula ch2. if the molar mass of the compound is 224.43 g/mol, what is the molecular formula of the compound?

10 g of nh4cl is added to 12.7 g of water. calculate the molality of the solution.

Introduction to Energy Instruction Active Describing Forms of Energy Match each form of energy with its description nuclear energy found when internal energy is transferred chemical energy found in the nucleus of an atom found in the flow of

Many trials are not needed before a hypothesis can be accepted

Consider the following reaction where Kp = 4.55*10-5 at 723 K: N2 (g) + 3H2 (g) ⇋ 2NH3 (g) a) If the three gases are mixed in a rigid container at 723 K so that the partial pressure of each gas is initially one atm, what will happen?

Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data? bar graph line graph histogram scatterplot

Consider the reaction below. The initial concentrations of PCl3 and Cl2 are each 0.0571 M, and the initial concentration of PCl5 is 0 M. If the equilibrium constant is Kc=0.

How many grams of carbon dioxide are in 11 moles of it?