CHEM 101 Final Ivy Tech| 139 Questions| With Complete Solutions 100% Verified Answers What is the definition of a scientific theory? - Correct Answer a model that explains the underlying reasons for observations and laws What term best describes a brief statement that summarizes many past observations and predicts new ones? - Correct Answer scientific law Which of the following is an example of a scientific law? - Correct Answer In a chemical reaction, matter is neither created nor destroyed.Which of the following would be considered a theory? - Correct Answer Helium balloons float because helium is less dense than air.
The key to success in chemistry is: - Correct Answer all of the above
A plastic block has dimensions of 2.2 cm x 3.0 cm x 1.5 cm and a mass of 12.4 grams. Will the block float in water and why? - Correct Answer No, because the density of the block is 1.3 g/mL which is greater than the density of water.Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with the dimensions of 10.0 in x 4.00 in x 3.00 in. - Correct Answer 3.80 x 104 The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation. - Correct Answer 1.72 x 10-10 m How many grams are in 1.48 x 107 μg? - Correct Answer 14.8
The correct decimal representation of 6.453 x 103 is: - Correct Answer 6,453
How many significant digits should be reported in the answer to the following question?(4.3-3.7) x 12.3= - Correct Answer 1 1 / 2
The correct scientific notation for the number 0.00050210 is: - Correct Answer 5.0210 x 10-4 Which measurement below represents the heaviest mass? - Correct Answer 1 Mg Determine the answer to the following equation with correct number of significant figures: 2.02+8.102-0.0297= - Correct Answer 10.09 A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the ball? - Correct Answer 4.82 mL When the value 4.449 is rounded to two significant figures, the number should be reported as: - Correct Answer 4.4 The correct number of significant figures in the number 865,000 is: - Correct Answer ambiguous How many inches are in 2.80 ft? - Correct Answer 33.6 Which of the following would NOT be considered a correct conversion factor? - Correct Answer 1 pair of shoes = 1 shoe Suppose a boat engine leaks 938 mL of oil into a lake. The mass of this spilled oil is 823 g. The oil will not mix with the lake water. Which statement is true? - Correct Answer The oil will float because its density of 0.877 g/mL is less than the density of water.Which state of matter has indefinite shape and is compressible? - Correct Answer gas
A solution is an example of a (an): - Correct Answer homogeneous mixture
Which of the following is NOT an example of a physical property? - Correct Answer Water can form hydrogen and oxygen under electrolysis conditions.
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