4 density a flask filled to the 250 ml mark contained

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Unformatted text preview: AMPLE 1.4 Density A flask filled to the 25.0 mL mark contained 29.97 g of a concentrated salt–water solution. What is the density of the solution? •Method of Solution The density (d) of an object or a solution is defined as the ratio of its mass (m) to its volume (V). d= m V Substituting in the given quantities: d= 29.97 g 25.0 mL d = 1.19 g/mL •Comment Density problems will be worked using the factor label method of problem solving in Example 1.10. _______________________________________________________________________________ EXAMPLE 1.5 Temperature Scale Conversion The freezing point of a 50-50 mixture of antifreeze (ethylene glycol) and water is –36.5°C. Convert this temperature to degrees Fahrenheit. •Method of Solution First write the equation for temperature conversions: °C = (°F – 32°F) × 5°C 9°F Next substitute –36.5°C and solve for degrees Fahrenheit: •Calculation –36.5°C = (°F – 32°F) × 5°C 9°F –65.7°C = (°F – 32°F) °F = –33.7°F ________________...
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This note was uploaded on 09/15/2009 for the course CHEM 102 taught by Professor Bastos during the Spring '08 term at Adelphi.

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