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Which of the following is NOT matter? SMOKE SAND AIR LIGHT

VERY GOOD!! Light is a form of energy and energy is NOT matter! LIGHT Next QuestionBack to the question

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Which of the following is NOT one of the three physical states of matter? Solid Gas Aqueous Liquid

Very good! Solid, liquid, and gas are the three physical states of matter Aqueous Next Question Back to the question

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Which of the following best describes carbon monoxide (CO)?

Very Good! Carbon monoxide (CO) is a compound. It is made up of two or more elements CHEMICALLY combined. Next Question Back to the question

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Salt water is an example of a…

Very good! Salt water is an example of a homogeneous mixture. The mixture looks uniform throughout. However, it is a mixture because both the salt and the water maintain their original properties and can be physically separated. Next Question Back to the question

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Which of the following CANNOT be broken down into a simpler substance? Carbon (C) Juice Oil and water Sodium chloride (NaCl)

Very Good! Carbon is an element. Elements cannot be broken into simpler substances. Sodium chloride is a compound, oil and water is a heterogeneous mixture, and juice is a homogeneous mixture. All three of these can be broken into simpler substances. Carbon (C) Next Question Back to the question

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The following are observations of what happens when two solutions are mixed. Which is NOT evidence that a chemical reaction has occurred? There is fizzing and bubbling There is fizzing and bubbling One of the solutions was yellow to start One of the solutions was yellow to start The test tube feels hotter The test tube feels hotter A solid forms A solid forms

Very Good! Production of a gas (seen by the fizzing and bubbling), energy released (the test tube felt hotter), and the formation of a solid are all evidence that a chemical reaction has occurred. One of the solutions was yellow to start Next Question Back to the question

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Which of the following is an example of a chemical change?

Very good! Remember in a chemical change…something NEW is produced Next Question Back to the question

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Phase changes are an example of a… Chemical change Chemical change Physical change Physical change Chemical property Chemical property Extensive property Extensive property

Very good! A phase change is only a change in state of mater so it is a physical change. Physical change Next Question Back to the question

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What would be the correct symbol for when solid salt (NaCl) is melted?

Very good! When salt is melted it becomes a liquid. Remember that a liquid is different than an aqueous solution. An aqueous solution is made when a solid is dissolved in water. Next Question Back to the question

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Mercury is a silver colored liquid. The silver color of mercury is an example of a …. Extensive physical property Physical change Intensive physical property Chemical property

Very good! Intensive properties to not depend on the amount of a substance. Extensive properties DO depend on the amount of a substance…like mass or length Intensive physical property Next Question Back to the question

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What is true about the following reaction: A (s) + B (aq)  C (g) + D (aq) C and D are reactants D is a solid A and B produce solid products A and B are reactants

Very good! A chemical reaction has this general form: Reactants  Products A and B are reactants Next Question Back to the question

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How do you write in scientific notation? 5.60 x x x x x x x x x x 10 2

Very good! Remember that when writing a number in scientific notation, there should be ONE number to the LEFT of the decimal. Since the number is less than 1, the exponent should be negative x Next Question Back to the question

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3.6 x 10 5 could be also written as…

Very good! Since the exponent is positive, your decimal should be moving to the right. Next Question Back to the question

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How many sig figs are in the ?

Very good! Remember that zeros in front of a number are placeholder zeros and are NOT significant. Terminating zeros to the right of the decimal are significant. Any zero in between significant numbers is significant Next Question Back to the question

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How many sig figs are in the ?

Very good! Remember that zeros after a number but before the decimal are placeholder zeros and are NOT significant. Any zero in between significant numbers is significant Next question Back to the question

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What is the correct answer to the following problem: =

Very good! = When adding or subtracting two numbers, your answer should have the same number of decimal places as the measurement with the least number of decimal places has two decimal places so your answer should be rounded to Next Question Back to the question

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CLOSE! But not quite correct…don’t forget about rounding! Try again…

What is the correct answer to the following problem: x 0.54 =

Very good! x 0.54 = When you multiply or divide two numbers your answer should have the same number of total sig figs as the answer with the fewest sig figs has two sig figs so your answer should be rounded to Done! Back to the question

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Great Job! Good luck on your quiz! Back to the start I’m in chemistry I’m in honors chemistry I’m in honors chemistry

Chemistry Don’t forget to also study how to record a measurement with the correct number of significant figures Finish the quiz review given in class for homework due Monday. Back to the start

Honors Chemistry Half of your quiz will be on the information in the presentation, the other half will be on dimensional analysis Don’t forget that the three dimensional analysis worksheets are due on Monday Back to the start