Which sentence in paragraph 1 explains what Americans are doing to help the environment? O a. Today, 60 percent of us believe that climate change is a serious threat.
O b. In 1980, coal, oil and gas made up 89 percent of the energy we used.
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c. 90 percent of us have recycled in the last year.
O d. Sometimes you can even find low belief in climate change.

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.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Match these items with their examples. 1. liquid solution milk 2. solid solution aluminum foil 3. compound soda 4. colloid steel 5. element salt