Which is a physical change?

A)

burning wood

Eliminate

B)

rusting metal

C)

cooking an egg

D)

freezing water

Whats the formula for NH4 + SO32-

More that 97 percent of all water on is

Select all that apply. reactions between atoms occur when: an atom seeks to fill its outer shell of electrons an atom seeks to balance its positive and negative charges the reaction will result in paired electrons

The specific heat of gasoline is 2.22 J/g•°C. How much heat would it take to raise 35.0 G of gasoline to 3.00°C?

Apresenta somente ligação iônica: a. HF b. H2O c. HBr d. O2 e. NaBr

Calculate the maximum mass of carbon dioxide that could be obtained by adding excess hydrochloric acid to 15 g of calcium carbonate.

True or false: during dry weather, the water level in a small pond drops because of runoff.

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?

An observation which requieres measuresment is called

In the equation Mg (s) + O2 (g) → MgO (s) what is the reactant?