Which type of chemical reaction is the corrosion

of iron?

A. reduction-oxidation

C. polymerization

B. substitution

D. decomposition

Coal, petroleum, and natural gas are all examples of

Changing of pH Freshly distilled water has a pH of about 5.6 and it changes to 6 on storage. WHY?

One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likely A. biased. B. incomplete. C. accurate. D. unchangeable.

A reaction has a theoretical yield of 45.8 g. when the reaction is carried out, 37.2 g of the product forms. what is the percent yield?

Which of the following is a single replacement reaction? CaO + H2O Ca (OH) 2 Mg + 2HNO3 Mg (NO3) 2 + H2 NaOH + HCl H2O + NaCl CH4 + 2O2 CO2 + 2H2O

Explain how you can use physical properties to compare substances.

How is this model useful?

What is the frequency of a wave? A. The amount of time that one full cycle takes B. The distance traveled by the wave during one full cycle C. The amount of cycles that occur in a given time D. The distance from the beginning to the end of a cycle

How many of the elements in the second row of the periodic table (li through ne) will have at least one unpaired electron in their electron configurations?

The Modern atomic model includes electrons orbiting the nucleus. WHich of the following parts of the Dalton's atomic model was disproved by the discovery of the electron?