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Problem 1.11 Do the following statements describe chemical or physical properties? Oxygen gas supports combustion Fertilizers help to increase agricultural production Water boils below 100°C on top of a mountain Lead is denser than aluminum Sugar tastes sweet Chemical Chemical Physical Physical Chemical
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Problem 1.12 Does each of the following describe a physical change or a chemical change? The helium gas inside a balloon tends to leak out after a few hours A flashlight beam slowly gets dimmer and finally goes out Frozen orange juice is reconstituted by adding water to it The growth of plants depends on the sun’s energy in a process called photosynthesis A spoonful of table salt dissolves in a bowl of soup Physical Chemical Physical Chemical Physical
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Li
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Problem 1.13 Give the names of the elements represented by the chemical symbols: lithium 3 6.941 Li
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Problem 1.13 Give the names of the elements represented by the chemical symbols: F
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 9 F fluorine 19.00
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Problem 1.13 Give the names of the elements represented by the chemical symbols: P
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 15 P phosphorus 30.97
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Cu
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Problem 1.13 Give the names of the elements represented by the chemical symbols: copper 29 63.55 Cu
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Problem 1.13 Give the names of the elements represented by the chemical symbols: As
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 33 As arsenic 74.92
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Zn
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 30 Zn zinc 65.39
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Cl
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 17 Cl chlorine 35.45
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Pt
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 78 Pt platinum 195.1
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Mg
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 12 Mg magnesium 24.31
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Problem 1.13 Give the names of the elements represented by the chemical symbols: U
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 92 U uranium 238.0
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Al
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 13 Al aluminum 26.98
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Si
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 14 Si silicon 28.09
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Problem 1.13 Give the names of the elements represented by the chemical symbols: Ne
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Problem 1.13 Give the names of the elements represented by the chemical symbols: 10 Ne neon 20.18
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Problem 1.14 Give the chemical symbols for the following elements:
potassium tin chromium boron barium plutonium sulfur argon mercury K Sn Cr B Ba Pu S Ar Hg
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Problem 1.15 Classify each of the following substances as an element or a compound: hydrogen water gold sugar
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Problem 1.15 Classify each of the following substances as an element or a compound: hydrogen water gold sugar elements in yellow
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Problem 1.16 Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture. seawater helium gas sodium chloride a bottle of soft drink a milkshake air in a bottle concrete homogeneous mixture element compound homogeneous mixture heterogeneous mixture homogeneous mixture heterogeneous mixture
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