(a) Interpretation: The average number of people entering the store per for the 5- day period is to be calculated. Concept introduction: Scientific notation is used to write large numbers by shifting the decimal point. It is expressed as the product of a decimal term and the power of 10 . Significant figures are used to express a measurement into a correct number in scientific notation. The significant figures reflect the closeness of measured values to the standard values.
(a) Interpretation: The average number of people entering the store per for the 5- day period is to be calculated. Concept introduction: Scientific notation is used to write large numbers by shifting the decimal point. It is expressed as the product of a decimal term and the power of 10 . Significant figures are used to express a measurement into a correct number in scientific notation. The significant figures reflect the closeness of measured values to the standard values.
Solution Summary: The author explains how scientific notation is used to write large numbers by shifting the decimal point and the power of 10.
The average number of people entering the store per for the 5- day period is to be calculated.
Concept introduction:
Scientific notation is used to write large numbers by shifting the decimal point. It is expressed as the product of a decimal term and the power of 10. Significant figures are used to express a measurement into a correct number in scientific notation. The significant figures reflect the closeness of measured values to the standard values.
Interpretation Introduction
(b)
Interpretation:
The average height of the starting five members of a women’s basketball team is to be calculated.
Concept introduction:
Scientific notation is used to write large numbers by shifting the decimal point. It is expressed as the product of a decimal term and the power of 10. Significant figures are used to express a measurement into a correct number in scientific notation. The significant figures reflect the closeness of measured values to the standard values.
A student obtains the following data: a- Mass of evaporating dish 21.345 g b- Mass of evaporating dish and saturated NaCl solution 42.817 g c- Mass of dish and NaCl after evaporation 38.915 g Report the Mass % of NaCl in this solution. Write the number as a percentage with the correct number of significant figures as shown. (i.e. 25%) There should be no space between the numbers and the % sign.
The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.94 gram sample of the mixture is heated until the creation of oxygen gas stops. If the sample mass after heating is 7.54 grams, what is the percent by mass of potassium chlorate in the mixture? Report your answer with 3 significant figures.
A sample of gold alloy has a mass of 9.3 kg. It is determined that 0.6 kg of the alloy is actually made up of copper and zinc, with the remainder being gold. Calculate the percentage of this gold in the alloy? Express your answer to the nearest percentage (nearest ones place). Hint: calculate the mass in grams of the gold in the alloy, divide by the whole mass of the alloy, and multiply by 100%. Round your answer to two significant figures.
(I had to alter the wording of this question since it wasn't calculating significant figures properly, so if you got it wrong because of significant figures you can assume you probably actually got it correct.)
Chapter 1 Solutions
Chemistry for Today: General, Organic, and Biochemistry
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