Besserer Unterricht im Handumdrehen
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1) Is propane, C3H8, an element, a compound, a homogeneous mixture, or a heterogeneous mixture? a) an element b) a compound c) a homogeneous mixture d) heterogeneous mixture 2) Which of the following descriptions describes the gas state? a) Matter in this state has a definite shape and definite volume. b) Matter in this state has a definite volume, and the shape is determined by the container. c) The shape and volume are determined by the container d) ALL OF THE ABOVE 3) Which element has a total of 79 protons?( LOOK UP PERIODIC TABLE) a) Bromine, Br b) Platinum, Pt c) Selenium, Se d) Gold, Au 4) Neon has three isotopes: Ne-20 (19.99 amu, 90.48%), Ne-21 (20.99 amu, 0.27%), and Ne-22 (21.99 amu, 9.25%). Find the atomic mass of neon. a) NO OPTIONS b) OPEN ENDED 5) Backpackers often use canisters of white gas to fuel a cooking stove’s burner. If one canister contains 1.45 L of white gas and the density of the gas is 0.710 g/cm2, what is the mass of the fuel in kilograms? a) NO OPTION b) OPEN ENDED

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