True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Which quantity does a light-year measure? A) distance B) speed C) time D) volume

A voltaic cell spontaneously converts chemical energy to (1) electrical energy (3) mechanical energy (2) geothermal energy (4) nuclear energy

What mostly contains the atoms of two or more types of elements. The number of atoms can range from two to many thousands

Write the balance chemical equation for propane.

What do the letters mean in H2O

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the test tube was allowed to cool. A green powder was left in the tube.

In which orbital does an electron in a bromine atom experience the greatest effective nuclear charge?

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling process.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.