What is an expression of Avogadro's law (k = constant) ?

a. PV = nRT

b. V/T = k

c. V = kn

d. PV=k

Which change will always result in an increase in the avitational force between two objects? increasing the masses of the objects and increasing the distance between the objects decreasing the masses of the objects and decreasing the distance

What is the process called that involves separating the minerals/elements from the ore?

Which of the following temperature is the coldest: 1) - 20 degree Celsius 2) - 20 degree Fahrenheit 3) 220 kelvin

The acceleration of the car with the data in the table above would bem/s2. If the applied force were cut in half, what do you predict the acceleration would be? m/s2

Which of the following naming rules would apply to CaCO3? metal cation + nonmetal anion (ide) metal cation + (roman numeral valence) + nonmetal anion (ide) polyatomic cation + nonmetal anion (ide) metal + polyatomic anion

How many moles of oxygen are needed to make 6.50 moles of magnesium oxide?

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

What material was added to powdered rock during tuttle and bowen's experiments?

Which of the following statements is true? Selected Answer: D. At least two of the above statements (A-C) are true. Answers: A. Ions are formed by adding or removing protons or electrons. B. Scientists believe that solids are mostly open space. C.

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.