Chapter 1, Problem 1.77AE

A student checked the accuracy of two standard top-loading balances by testing them with a standard 5.000-g mass. The results were as follows: Balance 1: 4.99 g, 5.04 g, 5.03 g, 5.01 g Balance 2: 4.97 g, 4.99 g, 4.95 g, 4.96 g Calculate the average values for balances 1 and 2 and calculate the percent error for each. Which balance is more accurate?

Indicate whether each of the following can be determined exactly or must be measured with some degree of uncertainty: the number of eggs in a basket the mass of a dozen eggs the number of gallons of gasoline necessary to fill an automobile gas tank the number of cm in 2 m the mass of a textbook the time required to drive from San Francisco to Kansas City at an average speed of 53 mi/h

The number of people present at an outdoor rock concert was estimated by police to be 40,000. What is the high and low estimate for the number of people present at the concert if it is assumed that this estimate has each of the following uncertainties? a. 10,000 b. 1000 c. 100 d. 10

A moving-van crew picks up the following items: a couch that weighs 147 pounds, a chair that weighs 67.7 pounds, a piano at 3.6 x 10 2 pounds, and several boxes having a total weight of 135.43 pounds. Calculate and express in the correct number of significant figures the total weight of the load.

Express the measurements to the requested number of significant figures. (a) 96,485 J/C to three significant figures (b) 2.9979 g/cm3 to three significant figures (c) 0.0597 mL to one significant figure (d) 6.626 1034 kg to two significant figures

A dietitian is planning a meal of beef, corn, and carrots for a patient. The patient needs the meal to contain 82.2 grams of carbohydrate, 48.7 grams of protein and 23.7 grams of fat. The table below shows the number of grams of carbohydrate, protein, and fat in 100 grams of each food. (Note, the total is not 100 grams due to the water and fiber content of the food.) How much of each food should be used so that the patient gets the needed nutrients? beef    g corn    g carrots    g   Carbohydrate Protein Fat Beef 1 22 12 Corn 21 3 1 Carrots 8 1 0

Perform the following calculations and report the answer to the appropriate number of significant figures:   An alcohol solution was prepared by adding enough water to 35. 0 mL of the alcohol to make a total volume of 80.0 mL of the mixture. What is the % alcohol by volume?   A 50.0 mL portion of 70.0% (by volume) alcohol solution was mixed with 50.0 mL of water. What is the new % alcohol by volume?    How many mL of a 70.0% (by volume) alcohol solution do you need to mix with enough water to prepare 50.0 mL of a 1.2% alcohol solution?

A pharmacist had 3 grams of hydromorphone hydrochloride. He used the following: 1⁄8gram, followed by ¼ gram, and then 1 ½ grams. Expressed as a decimal fraction, how many grams of hydromorphone hydrochloride were left?

THE LABEL ON THE POCKET OF NON-SUGAR SWEETENER INDICATES THAT IT PROVIDES 16 kJ OF NUTRITIONAL ENERGY. EXPRESS THIS IN KILOGRAMS