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The chapter sections to review are shown in parentheses at the end of each problem.
Round off or add zeros to the following calculated answers to give a final answer with three significant figures: (2.2)
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Basic Chemistry
- (1.7) A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.71 g/mL, 1.72 g/mL, 1.71 g/mL, 1.70 g/mL. If the actual value for the density of the sugar solution is 1.50 g/mL, which statement below best describes her results? O Her results are accurate, but not precise. O Her results are precise, but not accurate. O Her results are both precise and accurate O Her results are neither precise nor accurate.arrow_forwardHow many significant figures does the following calculations yield? (12.2-0.2)/1.02arrow_forwardThe answers 0.10 and 0.099 are both incorrect so please don't give me the same answer. Calculate what the answer is with the correct significant figures at the end? How is that and incomplete question? Perform the calculation and record the answer with the correct number of significant figures. (6.5 - 6.03) 4.73 0.099 Incorrectarrow_forward
- (1.9) Examine the graph of mass vs. volume of a substance below and answer the following question. How much does the volume (cm³) of the substance would increase when the mass increases from 16.0 g to 35.0 g? 40 15 Mass (g) 35 30 25 20 15 10 5 0 5 Volume (cm^3) 10arrow_forward(1.8)The area of a paper is 758 cm². What is the area of the paper in m²? O 7.58 x 104 m² O 7.58 x 102 m² O 0.0379 m² O 7.58 m²arrow_forward(4.3)(0.267) (7.40)(30.0) Above is written as a fraction Express your answer using the correct number of significant figures.arrow_forward
- Perform the calculation and record the answer with the correct number of significant figures. (6.5-6.08) %3D 3.95arrow_forward2.92 A graduated cylinder contains three liquids A, B, and C, which have different densities and do not mix: mercury (D = 13.6 g/mL), vegetable oil (D 0.92 g/mL), and water (D == 1.00 g/mL). Identify the liquids A, B, and C in the cylinder. (2.7) 50 40 30 -B 20 10 2.93 The gray cube has a density of 4.5 g/em2. Is the density of the green cube the same, lower than, or higher than that of the grayarrow_forward(1.6) Which of the following is an example of intensive properties? mass melting point O None of these volumearrow_forward
- (1.8, Similar to For Practice 1.8) Convert 9.255 L to gallon by dimensional analysis. (Hint: 1.057 qt = 1 L, 1 gal = 4 qts) O 2.19 gal O 4.57 gal O 3.50 gal O 2.45 galarrow_forward(1.3)Which of the following techniques can separate the homogeneous mixture of two liquids with different boiling points? O All of these O decanting O filtration O distillationarrow_forwardCarry out the following mathematical operations, expressing your answer to the correct number of significant figures/decimal places. (78.4 44.889) 0.87arrow_forward
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