The study of the rule-governed system that determines how speech sounds are systematically arranged and organized in a language is: 

How many oxygen atoms are present in aluminum hydroxide, Al(OH)3?

The atomic mass of cobalt is greater than the atomic mass of nickel even though nickel has a higher atomic number. What can you infer from this?

Solve the following problem and select the answer with the correct number of significant digits:

A sample of carbon monoxide, CO, contains 12.011 g of carbon and 15.999 g of oxygen. A sample of carbon dioxide, CO2, contains 12.011 g of carbon and 31.998 g of oxygen. Show that CO and CO2 follow the law of multiple proportions.

The surface area of the Caspian Sea is approximately 1.4 × 105 square miles. Given that there are 1.609 km in one mile, calculate the surface area of the Caspian Sea in square meters and round the answer to the correct number of significant figures.

Calculate the volume in cubic centimeters of a rectangular box that is 4.69cm by 9.72 mm by 0.0521 m

How many significant digits are in the following value? 156.100

Atoms of the same element with a different number of neutrons are known as

A 15 g sample of propane combusts in the presence of oxygen to produce 45 g of carbon dioxide and 24.5 g of water vapor. Select the mass of oxygen that reacted with the propane.