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Cards In This Set
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You put 1 spoonful of salt into 1 liter of water and stir. The resulting liquid is an example of a(n)
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Homogeneous mixture
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The chemical formula for water, H2O, means that each water molecule contains
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Two hydrogen atoms and one oxygen atom
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Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume?
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25 cm3
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The smallest unit of an element that maintains the properties of that element is a(n)
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Atom
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Solids, liquids, and gases are three forms of matter that
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All of the above
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How many atoms are in a single molecule of Fe2O3
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5
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Which of the following is not a pure substance?
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Mixture
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Which of the following is an element?
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Iron
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Diamond is known for its
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Hardness
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Helium is used in balloons because it is
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Lighter than air
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A physical property of gold is its
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Density
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The mass of a 20 L sample of gas with a density of 0.04 mg/L is
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0.8 mg
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An object's volume can be found by dividing its mass by its
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Density
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How can a chemical change be reversed?
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By chemical changes
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Which of the following causes a chemical change?
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Burning
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