A mathematical equation is an example of: A scientific theory A scientific law A model More than one of these

Heliocentric theory: was initially rejected was supported by Galileo stated that the earth rotated around the sun all of the above

Use the atomic weight in the periodic table to determine the equivalent weight of magnesium.

What happens during a chemical reaction

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the final pressure, in millimeters of mercury, if the final volume is 13.8 L?

Which of the following observations likely describes a physical change?

Which of the following transfers carbon from the nonliving environment to the living environment? Photosynthesis Cellular respiration Burning Decomposing

Which term describes this reaction? CH3Br (aq) + OH - (aq) - > CH3OH (aq) + Br - (aq) a. addition b. condensation c. elimination d. substitution

The elements of which group are nonreactive? halogens alkaline earth metals noble gasses alkali metals

Which best describes the definition of Lewis acids and bases? a general definition based on electron structure a general definition based on hydrogen ion concentration a specific definition based on a compound's ability to accept protons a specific

Question 22 Which change would cause the volume of a balloon to increase? A increasing the temperature of the balloon B increasing the atmospheric pressure C removing gas from the balloon D placing the balloon under water