Chemistry Chapter 1
The SI prefix mega- (M) means 10 to the... A. -6 B.-3 C.3 D.6 E.9
D
How many cubic inches are in 1 Liter? (1 in.=2.54 cm) A. 61.0 in^3 B. 155 in^3 C. 394 in^3 D. 1.64x10^4 in^3 E. none of them
A
An empty flask's mass is 17.4916 g and its mass is 43.9616 g when filled with water at 20.00°C (density=0.9982 g/mL). The density of "heavy water" at 20.0°C is 1.1053 g/mL. What is the mass of the flask when filled with heavy water at 20.0°C? A. 29.2573 g B. 46.8016 C. 46.7489 g D. 29.3100 g E. 43.9140 g
B
After carrying out the operation (13.7+0.027)/8.221, how many significant figures are appropriate to show in the result? A.1 B. 2 C. 3 D. 4 E. 5
C
If the temperature is 38.0°F then what is the temperature in Kelvin? A. 3.33 K B. 100.4 K C. 276.5 K D. 311.15 K E. 235.15 K
C
The average distance between the Earth and the Moon is 240,000 miles. Express this distance in meters. (1 mi=1609m) A. 6.1x10^5 m B. 5.3x10^5 m C. 3.9x10^8 m D. 1.5x10^5 m E. 9.4x10^4 m
C
The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million years at what average rate will it have to move in mm per month? (1 mi=1609 m) A. 2.0x10^-10 mm/mo B. 6.6x10^-6 mm/mo C. 4.2mm/mo D. 9.5 mm/mo E. 51 mm/mo
C
The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms? A. 5.5x10^8 kg B. 5.5x10^5 kg C. 5.5x10^-4 kg D. 5.5x10^-6 kg E. 5.5x10^-1 kg
C
The number 1.050x10^9 has how many significant figures? A. 2 B. 3 C. 4 D. 9 E. 13
C
What is the volume of a container that contains 14.3 g of a substance having a density of 0.988 g/cm^3? A. 14.1 cm^3 B. 0.0691 cm^3 C. 14.5 cm^3 D. 141 cm^3 E. 691 cm^3
C
If normal body temperature is 98.6°F then what is this in °C? A. 34°C B. 35.5°C C. 36.4°C D. 37.0°C E. 38.7°C
D
Radio waves travel at the speed of light, which is 3.00x10^8 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 x 10^8 km from Earth? A. 4.4x10^-2 min B. 1.6x10^5 min C. 4.0x10^15 min D. 44 min E. 2.6 min
D
Which of the following is not an SI base unit? A.Meter B.Ampere C.Second D.Gram E.Kelvin
D
A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters? A. 3.5x10^5 cL B. 3.5x10^4 cL C. 3.5 cL D. 3.5x10^-4 cL E. 3.5x10^-3 cl
E
Select the answer that expresses the result of this calculation with the correct number of the significant figures. (13.602*1.90*3.06)/(4.2*1.4097) A. 13.3568 B. 13.357 C. 13.36 D. 13.4 E. 13
E
Which is correct if 15,390,000 is rounded to two significant figures? A. 15 B. 1.5x10^-7 C. 1.5x10^8 D. 15,400,000 E. 15,000,000
E