What elements have the most similar chemical properties

The definition of chemical is "any substances that has a definite composition." What does "definite composition" mean?

The finches that Darwin studied in the Galapagos islands have evolved with different types of beaks: drilling, cracking, tearing, and fishing. This is an example of A) predation. B) adaptive radiation. C) warning coloration.

Calculate the weight in grams of the primary standard solid oxalic acid needed to prepare 250 ml of a 0.200 n solution to be used in this laboratory exercise.

Star A has a temperature of 9000 K while Star B has a temperature 3000 K. If the two stars are the same size, according to the Stefan-Boltzmann law, how much brighter is star A than star B?

A change in which property of light will have no effect on whether or not the photoelectric effect occurs

The temperature of a liquid is measured to be 212 °F. Soon afterward, the temperature is taken again and is determined to be 100 °C. Which of these is a possible true statement about the motion of the liquid's particles? A.

In a solution at 25°C, the [H+] is 3.5 * 10-6 M. What is the [OH-]?

The substance that dissolves to make a solution is called

How does one recognize a redox reaction? A. By changes in the oxidation states B. By atoms rearranging in compounds u C. By the presence of ions in solution u D. By the presence of oxygen atoms 0 SU

A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molar mass of 110 g/mol. Determine the molecular formula of the compound.