Which element is classified as a nonmetal?

(1) Be (3) Si

(2) Al (4) Cl

3 ways, explain how advance technology affects the word population

Calculate the number of moles of gas that occupy a 3.45 L container at a pressure of 150 kPA and a tempeature if 45.6.

The diffusion of innovation theory focuses on

A process in which one or more substances change to form new substances is called a (n).

Be sure to answer all parts. Consider the following equilibrium process at 686°C:CO2 (g) + H2 (g) ⇌ CO (g) + H2O (g) The equilibrium concentrations of the reacting species are [CO] = 0.0520 M, [H2] = 0.0400 M, [CO2] = 0.0810 M, and [H2O] = 0.0360 M.

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.

The most important reason why solid sodium hydroxide is not used as a primary standard is