12 Which gas is monatomic at room temperature and

pressure?

(1) nitrogen

(2) neon

(3) fluorine

(4) chlorine

Using complete sentences, explain how large-scale agriculture leads to increased atmospheric CO2?

An orbital would never exist in the quantum description of an atom is

The particles that make up a liquid move a. more quickly b. more slowly than a gas.

Some scientists believe that helium should not be used to inflate party balloons. why

When a metal bonds with a nonmetal, they form a (n) molecule ionic compound covalent compound element

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

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.