Dmitri Mendeleev's periodic law states that the chemical and physical properties repeat themselves in groups of

A. 4

B. 8

C. 12

D. 16

How does the use of synthetic oil impact the natural resource from which they are derived?

This "sphere" covers 70% of the Earth what am i

How are wave energy and water depth related? A. Wave energy decreases as water depth decreases B. Wave energy remains constant as water depth changes C. Wave energy decreases as water depth increases D.

Through a process is known as electrolysis, water can be split into hydrogen and oxygen. What type of reaction is this? Give an explanation for your choice.

How many minutes will it take for the quantity of n2o5 to drop to 1.9*10-2 mol?

A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of carbon dioxide produced by the reaction of of oxygen.

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.

Elements can be separated from one another. Question 6 options: True False

One gram of lipid yields about 9kcal of energy. that is due to the high abundance of which chemical element?

Which of the following happens during a chemical change? Check all of the boxes that apply 0 One atom or more changes into atoms of another element. New substances with different properties are formed. O Solids, liquids, or gases may form.