How many grams of sodium bromide must be dissolved in 400.0 g of water to produce a 0.500 molal solution?
a. 20.6 g
b. 20.0 g
c. 52.1 g
d. 2.00 g

In which phase(s) do the molecules take the shape of the container?

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.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude