Which statement is true about water molecules?
a. the oxygen atom has a negative charge.
b. the hydrogen adams do not share electrons.
c. water molecules move randomly around each other.
d. water molecules cannot dissolve many substances.

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?