While looking out the window, you see lightening flash and then 3 seconds later, you hear the thunder. How far was the lightening from you?

A. 3,300 ft

B. 3 miles

C. 300 ft

Describe the attractive forces and repulsive forces that exist between two atoms as the atoms move closer together

If a match is placed on top of a pool of gasoline, the gasoline catches on fire. However, if you spray the gasoline into a fine mist and add heat, it explodes. Explain this phenomenon.

Which of these processes indicates that smelting copper is a chemical change? It involves melting copper to form liquid metal. It involves heating charcoal to high temperatures. It involves drawing copper into long wires.

How many moles of water are there in one liter

A student removes a chemical sample from a reagent bottle to be used in an experiment. What should he do with any excess chemical remaining from this sample after the experiment is complete?

Which of the following is a chemical property? A.) Ability to burn B.) Mass C.) Density D.) All of the above

What is the density of rock if it has a mass of 25 g?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction.

Calculate the vapor pressure lowering on an aqueous solution of glycerin that contains 180g of glycerin and 1000g of water at 25c. The vapor pressure of water at this temperature is 23.8torr.

Why does one Oxygen atom bond with two Hydrogen atoms to form water? Why don't they bond in a different ratio?