Final Exam Flashcards
Express 0.0000000789 in scientific notation using the correct number of sig figs.
A) 7.89 E -7
B) 7.89 E 8
C) 7.89 E 7
D) 7.89 E -8
7.89 E -8
Write 6.83 E 5 using correct scientific notation
A) 0.0000683
B) 683000
C) 6.83000
D) 6.00083
683000
A significant figure is
A) every digit in a measurement that is known with certainty plus two uncertain digits.
B) every digit in a measurement that is known with certainty.
C) every digit in a measurement that is known with certainty plus one uncertain.
D) every digit in a measurement that is known with certainty plus every uncertain digit.
Every digit in a measurement that is known plus every uncertain digit
Which of the following is not a physical property of copper?
A) tarnishing of copper
B) density
C) characteristic color
D) electrical conductivity
Tarnishing of copper
A(n) ________ is a tentative, testable explanation based on observations.
A) conclusion
B) hypothesis
C) experiment
D) law
Hypothesis
Which of the following is a chemical change?
A) decaying banana
B) boiling of water
C) sanding wood
D) carving a piece of marble
Decaying banana
Which of the following has been thoroughly tested and explains the results of many experiments?
A) theory
B) conclusion
C) hypothesis
D) law
Theory
Which of the following is NOT a physical property?
A) flammability
B) state of matter
C) texture
D) density
Flammability
Which of the following best describes the difference between a physical and chemical property?
A) Physical properties describe the appearance of a substance whereas chemical properties describe how the chemical structure of a substance may be changed.
B) Physical properties can always be observed with the eye whereas chemical properties must be measured microscopically.
C) Physical properties are based on matter whereas chemical properties are based on energy.
D) Chemical properties describe the appearance of a substance whereas physical properties describe how the chemical structure of a substance may be changed.
Physical properties describe the appearance of a substance whereas chemical properties describe how the chemical structure of a substance may be changed.
Which lists in the correct order, the steps of the scientific method?
A) make observations, experiment, form hypothesis, results, identify problem
B) experiment, make observations, identify problem, results, form hypothesis
C) form hypothesis, make observations, identify problem, experiment, results
D) Identify problem, make observations, form hypothesis, experiment, results
Identify problem, make observations, form hypothesis, experiment, results
_______________ is the science that studies matter, its composition and structure, and the changes it undergoes.
A) A physical property
B) The scientific method
C) Chemistry
D) Density
Chemistry
In one second, light travels 2.998 × 108 meters. Which of the following is the correct way to write this in conventional notation?
A) none of these
B) 299,800,000 m/s
C) 0.00000002998 m/s
D) 2,998,000 m/s
299,800,000 m/s
Which of the following is the correct order of lengths?
A) mm > cm > m > km
B) cm > km > nm > mm
C) mm > m > cm > km
D) km > cm > mm > μm
km > cm > mm > μm
Nanoparticles have an approximate length of 0.1 × 10–10 meters. Which of the following is the correct way to write this in conventional notation?
A) 0.00000000001 m
B) 10,000,000 m
C) 0.000000001 m
D) 1,000,000,000 m
A) 0.00000000001 m
Daytime temperatures in a desert can reach 50.0°C. What is this temperature on the Fahrenheit temperature scale?
(C x 9/5) + 32 = F
122.0 F
Which of the following is the largest number?
A) 5 × 10 4
B) 3.5 × 10–6
C) 3 × 10 3
D) 3 × 10–2
5 x 10 4
A patient is admitted to the hospital. She weighs 186 lb. She is to receive an IV medication based on her body weight. The physician’s order reads: give 2.0 mg per kg. The label on the medication reads 10. mg per mL. Calculate how many mL of this medication you would administer to this patient.
Convert the patient’s weight from pounds to kilograms:
186 lb * (1 kg / 2.20462 lb) ≈ 84.37 kg
Determine the total dosage required:
84.37 kg * 2.0 mg/kg = 168.74 mg
Calculate the volume of medication needed based on the concentration provided on the label:
Concentration: 10 mg/mL
Volume (mL) = Total dosage (mg) / Concentration (mg/mL)
= 168.74 mg / 10 mg/mL
≈ 16.874 mL
16.9 mL
The metric prefix that means 1000 times larger is ________________.
Kilo
The boiling point of liquid oxygen is 90.2 K. What is this temperature on the Celsius scale?
K - 273.15 = C
-182.8 C
Convert 40.2 space degree C to Kelvin. (Round your answer to the tenths place- that is, one place past the decimal.)
C+ 273.15 = K
313.4 K
When solving problems using dimensional analysis, always start with the ________.
Given
_____________________ uses units to solve problems.
Dimensional Analysis
Choose which of the following conversion factors is incorrect.
A) 1000 km = 1 meter
B) 1000 mL = 1 L
C) 1000000 mcg = 1 g
D) 1000000 games = 1 Mgame
1000 km = 1 Meter
Children’s chewable acetamenophen contains 75 mg of acetamenophen per tablet. If the recommended dosage for this medication is 10. mg/ kg, how many tablets should you give to a child who weighs 52 pounds? Because this is a tablet, round the answer to the nearest whole number
Convert the child’s weight from pounds to kilograms:
52 lb * (1 kg / 2.20462 lb) ≈ 23.59 kg
Determine the total dosage required based on the weight:
Total dosage = Weight (kg) * Dosage per kg
= 23.59 kg * 10 mg/kg
= 235.9 mg
Divide the total dosage required by the dosage per tablet:
Number of tablets = Total dosage / Dosage per tablet
= 235.9 mg / 75 mg/tablet
≈ 3.15
3 Tabs
