click below

click below

Normal Size Small Size show me how

# Chapter 2/3 Review

Question | Answer |
---|---|

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 |