Chapter 3 Scientific Measurement Review Express 0 000
- Slides: 34
Chapter 3 Scientific Measurement Review
Express 0. 000 000 154 m in scientific notation. • 1. 54 x 10 -10 m
What is 5928 km expressed in scientific notation? • 5. 928 x 3 10 km
What is the result of multiplying (2. 5 x 1010) x (3. 5 x 10 -7)? • 8. 8 x 3 10
3 10 ) Perform: (2. 5 x + (3. 5 x 102) • 2. 9 x 103
The closeness of a measurement to its true value is a measure of … • accuracy
In the measurement 0. 503 L, what digit is not known with certainty? 3
How many significant figures in the measurement 0. 0034 kg? • 2
How many significant figures in the measurement 40, 500 mg? • 3
How many significant figures in the measurement 811. 40 grams? • 5
Round 111. 009 mm to 4 sig. figs. • 111. 0 mm
Record the following measurements with the correct sig figs.
What is the measurement 1042 L rounded to two significant figures? • 1. 0 x 3 10 L
Express the sum of 1111 km and 222 km, using the correct sig. figs. • 1333 km
Express the sum of 7. 68 m and 5. 0 m, using the correct sig. figs. • 12. 7 m
Express the product of 2. 7 mm and 5. 00 mm, using the correct number of significant figures. • 14 mm
Express the product of (4. 0 x 10 -2 m) x (8. 1 x 102 m) • 32 m
Which group of measurements is the most precise? a) 2 g, 2. 5 g, 3 g b) 1 g, 3 g, 4 g • a
Which is expressed to 3 significant figures: 0. 007 m, or 7. 30 x 10 -7 km • 7. 30 x -7 10 km
Which contains 2 significant figures: 0. 004 40 L, or 0. 000 44 L • 0. 00044 L
What quantity is represented by the metric system prefix deci-? • 0. 1
What is the metric system prefix for the quantity 0. 000 001 • micro
What is 0. 0075 km expressed in µm? • 7. 5 x 106 µm
What is 7896 mm expressed in m? • 7. 896 m
78 Liters is equal to how many cubic centimeters? • 78 L = 78000 m. L • 78000 m. L = 78000 cm 3
Express 987 g in pg • 9. 87 x 1014 pg
Which of the following is NOT correct: a) 1 cm 3 = 1 m. L b) 10 kg = 1 g c) 1000 mm = 1 m • b
Convert -32°C to Kelvin 241 K
The actual mass of a certain compound is 1. 420 g. You calculate the mass in your lab work as 1. 38 g. What is your percent error? • 2. 8%
Which of the following volumes is the smallest: 1 milliliter, or 1 microliter • 1 microliter
A rectangular block of lead measures 20. 0 mm x 30. 0 mm x 45. 0 mm. If the density of Pb is 11. 34 g/cm 3, calculate the mass of the block. • 306 g
As the mass of a substance increases, the density of a given volume of that substance. . . • increases
What is the volume of 344 g of ice, if the density is 0. 92 g/m. L? • 370 m. L
The pressure reading from a barometer is 742 mm Hg. Express this reading in kilopascals, k. Pa. (Use dimensional analysis to solve. 5 760 mm Hg = 1. 013 x 10 Pa) • 98. 9 k. Pa
