Chan hee is inflating a basketball using an air pump. he notices that the pump gets warm as he uses it. what is a good hypothesis that could lead to new experimentation?

A reaction is at equilibrium when ... A. the amounts of the reactants and products are not longer changing. B. the reactants have all turned into products. C. the products have all turned into reactants. D.

How does the current model of the atom differ from j. j. thomsons model

Why might it be important in a real life situation, to know if a chemical or physical change occurred?

What is the mass of 5.20 moles of Fe2O3? Your answer

What type of system is Earth?

Write the net ionic equation for the chemical reaction shown. Include physical states. HClO2 (aq) + NaOH (aq) ⟶H2O (l) + NaClO2 (aq)

Which if the following is an example of a stratovolcano?

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers