Semester Exam 1 Flashcards
Scientists classify matter on the basis of its physical and _____________ properties
Chemical
Copper is used more often than aluminum for electric wires. More than anything else, this suggests that copper is ________________________ than aluminum
More conductive
The amount of matter packed into a given volume determines its
Ductility
Oxygen (O2) is a ________________________
Diatomic element
Hydrogen peroxide (H2O2) is a ______________
Compound
How many atoms of oxygen are present in Al2(SO4)3
12
Dry ice has a temperature of 196 K. What is the temperature of dry ice on a Celsius scale?
-77*C
A substance can experience a change of state as ____________ energy is added to or removed from it
Thermal
When water vapor forms dew on the grass, _________________ has occurred
Condensation
Physical or Chemical Property. A shovel rusts in humid air.
Chemical
Physical or Chemical Property. Water evaporates at 100*C.
Physical
Physical or Chemical property. Sulfur mixed with an acid produces a gas.
Chemical
Physical or Chemical Property. Lead melts in a hot flame.
Physical
Convert -145.6*C to Kelvins.
127.55*K
The temperature outside is 87*F. What is that temperature in degrees Celsius?
30.56*C
What does 35.600 equal in kilograms?
35.6
You measure the products of a chemical reaction three times and obtain 8.15 g, 8.16g, and 8.13 g. The actual mass is 8.14 g. Your measurements are _______________________________.
Both accurate and precise
The smaller the percent error of a measurement, the more _____________ the measurement.
Accurate
Using scientific notation, convert 463 kg to milligrams.
4.63 X 10^8 mg
The measurement 0.00500610 m has how many significant figures?
6
How many significant figures are in the measurement 0.017000 g
5
One gallon (3785 mL) of gasoline has a mass of 2540 g. What is the density of gasoline?
0.671 g/mL
Perform the following operation: (26.9 cm)(5.0 m)
1.3 m^2
Perform the following operation: 16.1 mL - 6.81 mL - 0.00032 mL.
9.3 mL
What volume does 1-carat (0.2 g) diamond occupy? (density = 3.27 g/mL)
0.06 mL
The measurement 1.000010 has how many significant figures?
7
A(n) _________ system of measurment is any system of measurement based on a decimal scale.
Metric
The scale of a measuring instrument is ________________, that is, accurately subdivided into measurement units.
Graduated
Significant digits apply only to ______________ data, not to counted or pure numbers.
Measured
A measurement is made of two essential parts. What are two parts?
Unit and number
You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?
4.1%
Which has the greatest number of significant figures: 35,620 cars, 2.35 m, 25,000 mL?
2.35m
Perform the following operation, observing significant digits: 7.491 m + 60.2 m + 1.00224 m.
68.7 m^3
How many significant digits are in the quantity of 17 nickels?
0
You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?
4.1%
How many electrons can a d sublevel hold?
10
The type of sublevel found in all principle energy levels is the ____ sublevel.
S
Which is the correct electron configuration of aluminum (atomic number 13)?
1S^2 2S^2 2P^6 3S^2 3P^1
How many neutrons does the isotope 125 over 52 Te have?
73
Naturally occurring silver consists of two isotopes: 51.82% 107 over 47 Ag (106.9051 u) and 48.18% 109 over 47 Ag (108.9047 u). What is the atomic mass of silver?
107.9 u
The maximum number of electrons that can be found in any atom’s secound principle level is
8
Two different isotopes of a single element would have the same number of ________________ but a different number of _______________.
Protons/Neutrons
The number of protons in an atoms nucleus is its _________________________
Atomic number
