Ch.1 - Matter, Measurement & Problem Solving

Tro - Chemistry: A Molecular Approach 6th Edition

Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Not the one you use?Change textbook

Tro 6th Edition

Ch.1 - Matter, Measurement & Problem Solving

Problem 98d

Chapter 1, Problem 98d

Perform each unit conversion. d. 815 yd to km

Verified step by step guidance

Step 1: Identify the conversion factors. In this case, we know that 1 yard (yd) is equal to 0.0009144 kilometers (km).

Step 2: Set up the conversion so that the unwanted unit will cancel out. You should align the units in such a way that 'yd' in the denominator of the conversion factor cancels out 'yd' in the numerator of the given value.

Step 3: Multiply the given value by the conversion factor. This will give you the value in kilometers.

Step 4: Ensure that the units cancel out as expected. The 'yd' units should cancel out, leaving you with the value in 'km'.

Step 5: Check your work. Make sure that your answer makes sense in the context of the problem.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Unit Conversion

Unit conversion is the process of converting a quantity expressed in one unit to another unit. This involves using conversion factors, which are ratios that express how many of one unit are equivalent to another. For example, to convert yards to kilometers, one must know the relationship between these two units, specifically that 1 yard is approximately 0.0009144 kilometers.

Dimensional Analysis

Dimensional analysis is a mathematical technique used to convert between units by multiplying by conversion factors. It ensures that units cancel appropriately, leading to the desired unit in the final answer. This method is particularly useful in chemistry and physics for ensuring that calculations are dimensionally consistent and accurate.

Metric System

The metric system is an internationally recognized decimal-based system of measurement that includes units such as meters, liters, and grams. Understanding the metric system is essential for performing conversions, especially when dealing with larger or smaller quantities. In this case, converting yards to kilometers requires familiarity with the metric system, as kilometers are a metric unit of distance.

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A flask containing 23.21 mL of a liquid weighs 146.3 g with the liquid in the flask and 131.8 g when empty. Calculate the density of the liquid in g>mL to the correct number of significant digits.

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Textbook Question

A house has an area of 195 m². What is its area in each unit? a. km² b. dm² c. cm²

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