Which of the following compounds contains a double bond?

a) NH3

b) CO2

c) N2

d) Cl2

When a liquid in a closed container reaches a state of equilibrium with its vapor, a. the number of molecules in the vapor state and the liquid state are equal b. the number of molecules evaporating and condensing are equal

If the half-life of a radioactive material is 8 years, how many years will it take for one-half of the original amount of material to decay?

Nicolaas constructed a working model of the hydrologic cycle during science class. He used an open flame, liquid water, two large glass bulbs, and some glass tubing. Which of the following processes does Nicolaas' model demonstrate?

What is radius? When might you need to measure an object's radius?

Identify the following as True or False? 1. The limiting reactant is the reactant that is completely consumed in a chemical reaction. 2.

What combination of factors can change dry ice into a liquid

Rob is conducting an experiment in which he measures a person's body temperature in response to changes in air temperature. What is the independent variable that is manipulated in the experiment?

How many joules of energy are needed to warm 5.00 g of silver from 25.0°C to 27.5°C? (The specific heat of silver is 0.24 J/g°C.)

In the reaction of magnesium with oxygen gas, a considerable amount of energy was released. This is an example of an exothermic reaction.

Why does an air bubble rise to the surface of a glass of water?