How many grams of sodium metal are needed to make 29.3 grams of sodium chloride? Given the reaction: 2 Na + Cl2 2 NaCl

[Atomic masses: Na = 22.99 amu, Cl = 35.45 amu]

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

How are isotopes of the same chemical element alike? how are they different?

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.