Nora's class is studying heat at school. her teacher asked everyone to keep a list over the weekend of different ways they saw heat being produced. nora's family went camping. which way did her family most likely produce heat energy while camping? a) by burning b) by friction c) by electricity d) by mixing things

Which position represents spring in the southern hemisphere? a) b) c) d)

Consider the reaction of a(g) + b(g) + c(g) => d(g) for which the following data were obtained: experiment initial [a], mol/l initial [b], mol/l initial [c], mol/l initial rate, mol/l.s 1 0.0500 0.0500 0.0100 6.25 x 10^-3 2 0.100 0.0500 0.0100 2.50 x 10^-2 3 0.100 0.100 0.0100 1.00 x 10^-1 4 0.0500 0.0500 0.0200 6.25 x 10^-3 what is the rate law for the reaction?

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.