What's the chemical formula for potassium sulfide

How many electrons does the isotope oxygen-18 have? 6 8 10 18

A model of an atom is shown below. Which element is represented by this model of an atom? Boron, Carbon, Neon, or Sodium?

How many molecules are in 79g of fe2o3

Which of the following is an example of electrical energy transforming into mechanical energy? A. carrying people in an electric elevator B. using a light bulb to light a room C. using magnets to create an electric current D.

Write the equilibrium-constant kp expression for the reaction a (g) + 2b (l) = 4c (g) + d (g)

Cracks in rocks chemical or mechanical

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

Given 4.80g of ammonium carbonate, find: Number of moles of the compound Number of moles of ammonium ions Number of moles of carbonate ions Number of moles of hydrogen atoms Number of hydrogen atoms

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.