Semester 1 Review Flashcard

Describe the proper procedure for diluting an acid.
Describe the proper procedure for heating a substance in a test tube
Describe the proper procedure for testing the odor of a substance
Describe the proper procedure for determining the volume of a liquid in a graduated cylinder
Describe the proper procedure for deposing of a chemical
What is a material safety data sheet?
What is Chemistry?
What is the Scientific Method?
What is the main difference between physical properties and chemical properties? Give an example of each.
Physical change or chemical change?
a. Tearing a sheet of paper
b. melting a piece of wax
c. burning a log
You are given a sample of matter to examine. How do you decide whether the sample is a solid, liquid, or gas?
Contrast mixtures with pure substances.
Suppose different parts of a sample material have different compositions. What can you conclude about the material?
Suppose different parts of a sample have the same composition. What can you conclude about the material? Explain your answer.
State the Law of Conservation of Mass.
Water can be produced by the reaction hydrogen gas with oxygen gas.
a. Identify the reactant(s)
b. Identify the product(s)
c. If 8.00g of hydrogen gas react with 64.0g of oxygen gas, how many grams of water will be produced?
Which of the following are quantitative?
a. the liquid floats on water
b. the metal is malleable
c. the liquid has a temperature of 55.6 degrees celsius
The density of coper is listed as 8.94g/cm3. Two students each make three density determinations of samples of the substance. Student A’s results are 7.3g/cm3, 9.4g/cm3 and 8.3g/cm3. Student B’s results are 8.7g/cm3, 8.8g/cm3 and 8.8g/cm3. Compare the two sets of results in terms of precision and accuracy.
The density of copper is listed as 8.94g/cm3. Two students each make three density determinations of samples of the substance. Student A’s results are 7.3g/cm3, 9.4g/cm3 and 8.3g/cm3. Student B’s results are 8.7g/cm3, 8.8g/cm3 and 8.8g/cm3. Compare the two sets of results in terms of precision and accuracy.
Determine the number of significant figures in each of the following
a. 805.05g
b. 0.0144030 km
c. 1002 m
d. 400 ml
e. 30,000. cm
f. 0.0006335000 kg
Round 2.6765 to two significant figures.
Carry out the following calculations. Express your answer to the correct number of significant figures.
a. 52.13g + 1.7502g =
b. 12m x 6.41m =
c. 16.25g % 5.1442ml =
d. 14.39L – 6.2L =
Write the following numbers in scientific notation
a. 560,000
b. 33,400
c. 0.0004120

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