Mixture or pure substance: 1. blood 2. dyes 3. self-raising flour 4. muesli 5. copper wire 6. distilled water 7. table salt 8. milk 9. bronze 10. tea 11. oxygen 12. air

The chemical formula for hydrogen peroxide

A container at stp contains 3.46 moles of neon gas. What is the volume of the neon gas?

Is CoCO3 aqueous or solid?

At 6pm, you see logs piled up for a campfire. Later you see flames and feel heat from it. At 8pm, only smoldering ashes remain. what changed have taken place? how can you tell?

Which substance is reduced in this redox reaction? CuO (s) + H2 ( g. → Cu (s) + H2O (l)

Assume that the potential energy of the products in a chemical reaction is 60 kilojoules. this reaction would be exothermic if the potential energy of the reactants were

Which type of ions are formed when an acid is dissolved in water?

According to the collision theory, when can a chemical reaction occur? When enough activation energy is added to correct the orientation of the particle collisions When reactants collide with enough energy to intersect their valence shells and form

Why is ice less dense than water? A. When water freezes, it forms a crystal structure with less volume than liquid water. B. Ice crystallizes with an open structure, and the gaps that form between the water molecules in ice increase its volume. C.

The difference between isotopes for the same element will be found in the atoms' a. number of protons. b. number of electrons. c. number of neutrons. d. charges.