Scientific Notation
Which number is equal to 3.6 * 105 ?
A. 360,000 B. 3,600,000 C. 0.000036 D. 0.0000036
A. 360,000
How many significant digits are in the number 0.0072140?
A. 4 digits B. 5 digits C. 7 digits D. 8 digits
5 digits
The accepted value for the molar volume of a gas is 22.4 liters. In a laboratory experiment, a student determines the value to be 24.8 liters. What is the percent error of the student's measurement?
A. 0.120% B. 0.107% C. 10.7% D. 12.0%
C. 10.7%
% Error =[(Measured-Accepted)/Accepted]*100%
[(24.8-22.4)/22.4]*100%
Which quantity of heat does a kilocalorie represent?
A. 100 calories B. 1000 calories C. 1 100 calories D. 1/1000 calories
B. 1000 calories
Four students each measured the length of a drinking straw. The four measurements are shown below.
109 cm 1.1 m 1092 mm 0.001 km
Which measurement is most precise?
A. 109 cm B. 1.1 m C. 1092 mm D. 0.001 km
C. 1092
Which shows 833,000 written in scientific notation?
A. 8.33 *103 B. 8.33*104 C. 8.33*105 D. 8.33*106
C. 8.33*105
A chemistry measurement shows .02760 grams of sodium chloride in a beaker. How many significant digits are in this measurement? A. 5 B. 4 C. 3 D. 2
B. 4
If the observed value for a measurement is 0.80 Å and the accepted value is 0.70 Å, what is the percent error?
Angstrom =Å =1*10-10
A. 0.17% B. 0.14% C. 17% D. 14%
D. 14%
% Error =[(Measured-Accepted)/Accepted]*100%
How many calories are equivalent to 35 kilocalories?
A. 0.035 calories B. 0.35 calories C. 3,500 calories D. 35,000 calories
D. 35,000 calories
The speed of light: 1.86 * 105 miles/second.
Use the statement above to mark the following question
True or False. The speed of light is 18600000 miles/second in standard form.
False because speed of light: 1.86 * 105 miles/second =186,000
Which expression represents the number 0.00017 written in scientific notation?
A. 1.7 * 10-4 B. 1.7 * 104 C. 1.7 *10-3 D. 1.7 *103
A. 0.00017
If the rules for significant figures are observed in the addition example shown, how should the total for this addition be rewritten? A. 5,610.00 B. 5,610.340 C. 5,610.34 D. 5,610.3
(35.7 + 432.33 +5,142.312) = 5,610.342
D. 5,610.3
A laboratory experiment was performed to determine the percent by mass of water in a hydrate. The accepted value is 36.0% water. Which observed value has an error of 5.00%? A. 31.0% water B. 36.0% water C. 37.8% water D. 41.0% water
C. 37.8%
% Error =[(Measured-Accepted)/Accepted]*100%
The population of a country is estimated at 1.04 * 109 people. Which number is closest to 1.04*109 ?
A. 1 million B. 100 million C. 1 billion D. 10 billion
C. 1 Billion
A light year is approximately 6*1012 miles. What is another way to write this number?
A. 6,000,000,000,000 B. 6,000,000,000 C. 600,000,000,000 D. 60,000,000,000,000
A. 6,000,000,000,000
The Philippines has a population of approximately 78,000,000. What is 78,000,000 written in scientific notation?
A. 7.8 * 105 B. 7.8 *106 C. 7.8*107 D. 7.8* 108
C. 7.8*107
Expressed to the correct number of significant figures, what is the correct sum of (3.04 g + 4.134 g + 6.1 g)?
A. 13 g B. 13.3 g C. 13.27 g D. 13.274 g
B. 13.3 g
The molecular mass for O2(g) is 32.0. A student conducted an experiment in which she measured the mass of O2(g) to be 28.0. What is the percent error in the student's result? A. 1.25% B. 1.43% C. 12.5% D. 14.3%
C. 12.5%
% Error =[(Measured-Accepted)/Accepted]*100%
Which quantity is equal to 50 kilojoules?
A. 0.05 J B. 500 J C. 5 * 103 J D. 5 * 104 J
D. 5 * 104 J
Who are the best 2nd year Teacher in New York City?
Mr. Bekoe or Ms. Ahmad for regular amount of points
Mr. Bekoe and Ms. Ahmad for double points
The total area of Alaska is 591,000 square miles. Which of the following is 591,000 expressed in scientific notation?
A. 591*104 B. 5.91*105 C. 59.1*105 D. 5.91*106
B. 5.91*105
What is the product of (2.324 cm * 1.11 cm) expressed to the correct number of significant figures?
A. 2.58 cm2 B. 2.5780 cm2 C. 2.5796 cm2 D. 2.57964 cm2
A. 2.58 cm2
Kendrick Lamar performed at the Roots picnic; There was 850,000 people with 15% margin of error, attended the concert.
What is meant by a 15 % margin of Error?
Calculate 15% of 850,000:
850,000×0.15=127,500
Determine the range:
So, the actual attendance could reasonably be between 722,500 and 977,500 people.
The distance between Portland, Oregon and Detroit, Michigan is most often measured by which unit of measurement?
A. Meters B. Kilometers C. Centimeters D. Millimeters
B. Kilometer
What goes on every assignment, quiz, lab or worksheet?
Name, Date, and Period