1- La masa molar es el número de moles de una sustancia que tendría una masa de 1 gramo. (2 Points)
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2- La suma del porcentaje por masa de cada elemento de un compuesto debe ser igual al 100%
(2 points)
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3- Un hidrato es un compuesto que reacciona violentamente en presencia de agua.
(2 points)
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4- Anhidro es un término que se usa para describir un compuesto que no posee moléculas de
agua enlazadas a sus átomos
(2 points)

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.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

The density of benzene at 15 °c is 0.8787 g/ml. calculate the mass of 0.1500 l of benzene at this temperature. enter your answer in terms of grams