Put the following value into scientific notation: 12300

Potassium nitrate, KNO3, is often added to toothpaste as a pain-reliever. A typical tube of toothpaste contains 70 g KNO3. Calculate the number of KNO3 formula units in a typical tube of toothpaste.

A certain element has two naturally occurring isotopes, 10Jo and 11Jo (do not look for this element on the Periodic Table, it does not exist). The average atomic mass for this element is 10.811 amu. The natural abundance of 10Jo is 19.9% and its mass is 10.0129 amu. Calculate the mass of 11Jo. A) 10.0129 amu B) 11.0093 amu C) 80.1000 amu D) 10.8110 amu E) 10.4112 amu

Which of the following statements concerning atomic structure is/are false? Neutrons and electrons are found in space as a cloud around the nucleus. The nucleus contains all the positive charge of an atom. The electron cloud surrounds the nucleus and accounts for most of the atom’s volume.

According to the Law of Conservation of Mass, when the following equation is balanced, the coefficients are ________. ____ NH3 (g) +  ____ O2 (g) →  ____ NO2 (g) +  _____ H2O (g)

Determine the mass of 4.57 mol of CO2. 

The Boolean Satisfiability Problem (SAT) is an NP-complete optimization problem. Which of the following are good heuristic candidates to solve this problem ? (select all that apply)

________ is often referred to as the “stress” hormone since it initiates and maintains seed and bud dormancy.

Which body system plays a role in influencing behavior?

Which term describes the forcing out of water at the surface of a plant’s leaves?