Which of the following changes would decrease the rate of a reaction? addition of a catalyst increasing the concentration of reactants decreasing the concentration of products additional heat to an exothermic reaction

How does the glass of a greenhouse model the carbon dioxide and other gases in EarthÍs atmosphere? 1. The glass absorbs light and releases energy in the form of heat. 2. The glass allows light in and traps much of the radiated heat. 3.

Using the periodic table, what is the oxidation number of: a. calcium b. aluminum c. fluoride

The Earth's Equator goes. Through the center of earth ... True or False

Concentrated nitric acid is 15.6M and has a density of 1.41g/mL. What is the weight percent of concentrated HNO3?

For the following metal and non-metal combination reaction you have 3 moles of Na. How many moles of Cl2 would you need to add to have stoichiometrically equivalent amounts of NA and Cl2? 2Na (s) + Cl2 (g) - - > 2NaCl (s)

Why is it harder for the earth to recover from some natural disasters now? A) Human influence may compound the damage. B) The natural disasters have gotten worse. C) This statement is not true.

Heat is most closely related to ___ energy. A. Nuclear B. Electrical C. Thermal

How many moles are in 26.4 grams of lithium

What is the independent, dependent, control group and constant: A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight.

Where are two places that scientists obtain scientific knowledge