Which procedures were followed in this lab to decrease experimental error? Check all that apply.
repeating the experiment three times for each temperature
changing the volume of solution during each step
using three different temperatures instead of only two
using different types of antacids with different chemical formulas
using three different surface areas instead of only two

How many molecules are found in 1.32 mol of nacl?

Compare and contrast physical changes with chemical changes.

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.