Two solids, a and b, are located in the same family on the periodic table. a sample of each is placed in a beaker of hcl. substance a produces few bubbles, while substance b bubbles vigorously.

what do the bubbles indicate? (chemical reaction ? )
where the substances are located in relation to one another on the periodic table and the activity series? ( b is lower than a, and more reactive)
the name of the family the substances could be in ?
what substance will have a larger atomic radius? (b? )
what substance will have a larger ionization energy?

Which feature do highland climates have that lower elevation areas do not?

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 prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.