Silicon dioxide powder dissolves in water. Is this a physical or a chemical change?

What is unusual about solid water compared to solids of other materials?

The carton fe3 + is formed when

An educated guess is based on past experience. How does a hypothesis express the educated guess?

Hector used 240 Joules of energy to lift (straight up) a TV that weighed 80 Newtons. How high did Hector lift the TV? A. 1/3 meter B. 2 meters C. 3 meters D. 4 meters

A very small equilibrium constant means ... a. an equal amount of reactants and products c. more products b. more reactants d. system isn't at equilibrium

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.