Polyatomic ions

a. are a result of ionic bonds.

b. contain covalent bonds.

C. contain both ionic and covalent bonds.

d. are always charged.

e. both band d.

Which best describes the process of igneous rock formation?

Which is an example of pseudoscience? A. use of X-rays to observe the bones of the arm B. use of DNA analysis to determine paternity C. use of vaccines to prevent the occurrence of disease D. use of astrology to predict the personality of a child

Problem 3.100 a chemical plant uses electrical energy to decompose aqueous solutions of nacl to give cl2, h2, and naoh: 2nacl (aq) + 2h2o (l) →2naoh (aq) + h2 (g) + cl2 (g) part a if the plant produces 1.

Why do the elements at the bottom of the periodic table have lower ionization energies than their group/family partners at the top of the periodic table?

The form of oxygen that combines three oxygen atoms to each molecule, is found in the stratosphere and shields out harmful UV rays from the sun is:

How many metaloides are found on the periodic table

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?