3 Na + 3 Cl + Alz --> 3 NaCIAI 17. In the chemical equation, there are three Na atoms, three Cl atoms, and three
Al atoms represented on both sides. The equation is balanced. Which of the
following best explains the fact that the equation is balanced?
A. laws of motion
B. law of gravity
C. law of conservation of mass
D. law of conservation of energy

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?