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Chapter 2/3 Review

QuestionAnswer
The decimal number 0.00210 expressed in scientific notation is 2.10 × 10-3. True
Zeros located before a number and after a decimal point are significant. False
The number 9.10 × 103 contains three significant figures. True
When the length of an object is reported as 54.2 m, the actual length can be assumed to be between 54.1 m and 54.3 m. True
In addition and subtraction calculations, the answer will have the same number of decimal places as the number carrying the fewest decimal places. True
The decimal number 0.000010 expressed in scientific notation is 1.0 × 10^5. False
There are 1000000 megameters in one meter. False
Conversion factors are constructed from any quantities not necessarily equal to each other. False
Given that 1 inch equals 2.54 centimeters, then 1 cubic inch equals 2.54 cubic centimeters. False
All matter has the same density. False
If you are given the volume and density of an object, you can calculate the mass by using the equation: d*V = m. True
Matter is defined as anything that has mass and occupies space True
Liquid is the only form of matter that is compressible. False
The corrosion of copper is a physical change. False
Matter can be destroyed False
The coldest temperature possible is -273.15 K. False
Different objects have different heat capacities. True
An element is a substance that cannot be broken down into a simpler substance True
Water is an element. False
The correct decimal representation of 9.6732 × 10^4 is 96,732 True
In the number 61.732, the "2" digit is estimated True
The correct number of significant figures in the number 3.010 x 10^6" is 4 True
The answer for the equation below with correct number of significant figures: 7.841 × 14.7 ÷ 0.834 is 138.2 False
The answer to the following equation with correct number of significant figures: 1.01 + 7.361 - 0.0499 is 8.321 False
Which measurement below represents the lightest mass? A) 1 mg B) 1 kg C) 1 pg D) 1 Mg E) 1 dg C
Why does oil float on a lake (hint- density) The density of oil is less than the density of water so oil will float.
How many significant digits should be reported in the answer to the following calculation? (5.122) + (20.6) 3
What is the density of 55 mL of a liquid that has a mass of 88.6 g 1.6 g/mL
What is the volume of 14.6 g of a liquid that has a density of 0.835 g/mL 17.5 mL
How would you classify Lucky Charms? mixture-heterogeneous
The decimal number 0.00210 expressed in scientific notation is 2.10 × 10-3. True
Zeros located before a number and after a decimal point are significant. False
The number 9.40 × 103 contains three significant figures. True
When the measurement of an object is reported as 56.2 m, the actual measurement can be assumed to be between 56.1 m and 56.3 m. True
In addition and subtraction calculations, the answer will have the same number of decimal places as the number carrying the fewest decimal places. True
The decimal number 0.00090 expressed in scientific notation is 9.0 × 106. False
There are 1000000 megameters in one meter False
Conversion factors are constructed from any quantities that are not necessarily equal to each other False
Given that 1 inch equals 2.54 centimeters, then 1 cubic inch equals 2.54 cubic centimeters False
All matter has the same density. False
If you are given the volume and density of an object, you can calculate the mass by using the equation: m = V*d. True
Matter is defined as anything that has mass and occupies space True
Liquids are compressible. False
The oxidation of copper is a physical change False
Matter can be destroyed False
The coldest temperature possible is -273.15 K. False
Different objects have different heat capacities True
An element is a substance that cannot be broken down into a simpler substance True
Water is an element. False
The correct decimal representation of 8.23421 × 10^5 is 823,421 True
In the number 23.98, the "9" digit is estimated False
The correct number of significant figures in the number 6.0100 is 2 False
Determine the answer for the equation below with correct number of significant figures: 3.4 × 5.68 19
Determine the answer to the following equation with correct number of significant figures: 3.21+7.703-0.0412 is 10.9 False :10.87
Which measurement below represents the lightest mass? A) 1 mg B) 1 kg C) 1 pg D) 1 Mg E) 1 dg C
Why does oil float on water? (hint:density) The oil will float on water because it is less dense than water.
An object has a mass of 44.0 grams and a density of 12.7 g/mL. What is the volume of the object? 3.46 mL
How many significant digits should be reported in the answer to the following calculation? (8.123) + (1.21) = 3
What is the density of 46 mL of a liquid that has a mass of 88.3 g 1.9 g/mL
How would you classify Lucky Charms? mixture-heterogeneous
Created by: aschuyler