Exam 1: Units of Measurement for Physical and Chemical Change

What answer should be reported, with the correct number of significant figures, for the following calculation? 1.682 × 10^-3 + 4.311 × 10^-2

How many cm are in 22.2 ft?

Give the composition of water.

Match the following. -deci

Choose the pure substance from the list below.

If a solution has a temperature of 355 K, what is its temperature in degrees Celsius?

Choose the homogeneous mixture from the list below.

Round the following number to four significant figures and express the result in standard exponential notation: 229.613

The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 105 mg kg^-1 of body mass. Calculate the dose in milligrams for a 105-lb person. (1 lb = 453.59 g)

What symbol is used to represent the factor 10^-1?

Kilogram is a measure of ________.

A carpet is 126 cm long. How long is it in feet?

Define the law of the conservation of energy.

Determine the volume of an object that has a mass of 100 g and a density of 9.55 g mL^-1.

Which of the following is an SI base unit?

Match the following. -micro

What answer should be reported, with the correct number of significant figures, for the following calculation? (249.362 + 42) / 63.498

What answer should be reported, with the correct number of significant figures, for the following calculation? 100.0 g × 4.18 J g^-1 °C^-1 × (26.4 °C - 25.5 °C)

The density of air under ordinary conditions at 25° C is 1.19 g L^-1. How many kilograms of air are in a room that measures 12.0 ft x 12.0 ft and has a 11.0 ft ceiling? (1in. =2.54 cm (exactly); 1 L=10³ cm³ )

Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low freezing point, 8.6 °F. What is the freezing point in °C?