What is the most important characteristic in determining an element's properties?

Convert 236 mg MgP207 to moles. Use three significant figures in your answer.

1. Leigh is preparing popcorn for her friends. She removes a stick of butter from the refrigerator and cuts a fourth of it from the rest. Leigh remembers her lesson in school today about the conservation of mass that occurs during state changes.

Rutherford investigated atoms by firing small, positively charged particles at a thin sheet of gold foil. What results would he expect to see if he believed Thomson's model of the atom to be correct?

What is formed when sediment is blown against an obstacle and settles behind it

What is the chemical name of burning

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

Element X has an electron configuration that ends with 5p6. Which of the following describes this atom correctly? a. unstable metal b. noble gas c. alkali metal d. unstable nonmetal

If 12.1 kilograms of al2o3 (s), 60.4 kilograms of naoh (l), and 60.4 kilograms of hf (g) react completely, how many kilograms of cryolite will be produced?

A certain ionic compound X has a solubility in water of 40.3 g/L at 20. degrees C. Calculate the mass X of required to prepare 500. mL of a saturated solution of X in water at this temperature.

IM ON A TIMER! What are the main types of star clusters? Check all that apply. binary eclipsing globular open wobbling