What is the mass number most similar to?

The average mass of all isotopes of the element

The sum of the atomic numbers of all isotopes

The sum of the Masses of all the isotopes

The average charge of all ions of the element

The element carbon, nitrogen, and oxygen are all part of the same?

A student lost part of his lab notebook and didn't know what the original measure should have been. He knows that he calculated a 35.5% error and his experimental measurement was 15.6 cm. What are the two possible values for the actual measurement?

In a desert, soil containing a mixture of sand and small rocks is exposed to wind erosion. Over time, how would the land surface change?

The amount of heat needed to change 1 gram of a solid to 1 gram of a liquid at constant temperature is called 1. vaporization 2. Sublimation 3. fusion 4. fission

On a pH scale, pH and [H+] are inversely proportional. what does this mean?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.

Which describes the fourth state of matter known as plasma? A It is a liquid containing nuclei and electrons. B It is a gas containing nuclei and electrons. C It is a liquid containing electrons created by fusion.

The process of using dna to produce complementary rna molecules is called

A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound? A. CaCl B. Ca0.9Cl1.8 C. CaCl2 D. Ca2Cl4