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Chemistry
Q:
How many moles and how many atoms of zinc are in a sample weighing 34.9 g?
A) 0.533 mol, 8.85 10-25 atoms
B) 0.533 mol, 3.21 1023 atoms
C) 1.87 mol, 3.10 10-24 atoms
D) 1.87 mol, 1.13 1024 atoms
Q:
24.0 g of which element contains the greatest number of atoms?
A) B
B) C
C) N
D) O
Q:
One mole of which element has the smallest mass?
A) Co
B) Cu
C) Ni
D) Zn
Q:
What is the mass of one atom of the element hydrogen?
A) 2.0 g
B) 1.0 g
C) 3.4 10-24 g
D) 1.7 10-24 g
Q:
The number of atoms of carbon in 12 g of carbon is closest to .
A) 12
B) 1022
C) 1023
D) 1024
Q:
What is the standard isotope that is used to define the number of atoms in a mole?
A) 1H
B) 12C
C) 16O
D) 20Ne
Q:
The element antimony has an atomic weight of 121.757 amu and only two naturally-occurring isotopes. One isotope has an abundance of 57.3% and an isotopic mass of 120.904 amu. Based on these data, what is the mass of the other isotope?
A) 121.757 amu
B) 122.393 amu
C) 122.610 amu
D) 122.902 amu
Q:
An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu, and the other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element?
A) 185.702 amu
B) 185.954 amu
C) 186.207 amu
D) 186.956 amu
Q:
Given that 2.54 cm = 1 in, 350 in3 = ________ L.
Q:
The quantity 1.0567 qt rounded to two significant figures is ________ qt.
Q:
The number of significant digits in 0.07090 g is ________.
Q:
________ refers to how well a number of independent measurements agree with one another, whereas ________ refers to how close to the true value a given measurement is.
Q:
The nutritionist unit Calorie is equal to ________ calories.
Q:
Stored energy is ________ energy, and energy of motion is ________ energy.
Q:
The density of mercury is 13.6 g/cm3. The mass of 38.0 cm3 of mercury is ________ g.
Q:
The density of lead is 11.3 g/cm3. The volume occupied by 227 g of lead is ________ cm3.
Q:
The quantity 3.00 cm3 is the same as ________ mL.
Q:
Volume is a derived unit having the unit lengthx, where x = ________.
Q:
The difference between the boiling point and freezing point of water is 100C, which is ________ kelvins.
Q:
The meter is closest in length to the English system unit the ________.
Q:
The fundamental SI unit of mass is the ________.
Q:
Using exponential notation, there are ________ g in 1.0 kg.
Q:
Using exponential notation, there are ________ bytes of memory are contained in a 2 TB external hard drive.
Q:
Sodium is an example of an ________ metal that reacts with water to form hydrogen gas and an ________ solution.
Q:
Elements are classified as metals, nonmetals, or semimetals. At room temperature a certain element exists as a dull yellow solid that is a poor conductor of electricity and is brittle. This element is most likely a ________.
Q:
A property that depends on the amount of a substance is an ________ property, whereas a property that is independent on the amount of substance is an ________ property.
Q:
The element that is in period 6 and group 7A has the symbol ________.
Q:
The element Se can be found in period ________ and group ________ of the periodic table.
Q:
In a periodic table rows are called ________ and columns are called ________.
Q:
Pb is the symbol for the element ________.
Q:
The symbol for mercury is ________.
Q:
A preliminary explanation of the results of many experiments that can be used to make predictions and suggest further experimentations is a ________.
Q:
Chemistry is the study of the composition, properties, and transformations of________.
Q:
Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. Calculate the approximate number of liters required for a person to walk 10. kilometers in Death Valley.
A) 2.9 L
B) 12 L
C) 30 L
D) 47 L
Q:
A fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 102 nm thick, how many square meters will the oil slick cover?
A) 1.9 10-3 m2
B) 1.9 106 m2
C) 1.9 107 m2
D) none of these
Q:
If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 185-pound man?
A) 1.2 kg Ca
B) 5.7 kg Ca
C) 1.2 102 kg Ca
D) 5.7 102 kg
Q:
Round off 00 907506 to four significant figures.
A) 00 91
B) 9076
C) 9100
D) 9.075 105
Q:
An acetylene molecule contains 2 atoms of carbon. The number 2 represents how many significant figures?
A) one
B) two
C) three
D) infinite
Q:
How many significant figures are there in the answer for the following problem? = ?
A) one
B) two
C) three
D) four
Q:
How many significant figures are there in the answer for the following problem?
56.4 + 0. 8822 + 21 = ?
A) one
B) two
C) three
D) four
Q:
How many significant figures are there in the answer to the following problem?
( 9.992 3.200) + 0. 610 = ?
A) one
B) two
C) three
D) four
Q:
How many of the following numbers contain 3 significant figures?
0. 408 9.040 0.0 400 9.05 1024
A) one
B) two
C) three
D) four
Q:
Calculate the kinetic energy of a 150-g baseball moving at a speed of 36. m/s ( 81 mph).
A) 5.4 J
B) 9.7 101 J
C) 5.4 103 J
D) 9.7 104 J
Q:
A mass of mercury occupies 0. 950 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.
A) 0.0 553 L
B) 0. 0613 L
C) 16.3 L
D) 18.1 L
Q:
The factor 10-3 corresponds to which prefix?
A) deka
B) deci
C) milli
D) centi
Q:
The factor 1,000,000 corresponds to which prefix?
A) deka
B) deci
C) mega
D) milli
Q:
What symbol is used to represent the factor 10-1?A) MB) mC) D) d
Q:
Which of the following is the smallest volume?
A) 44 cm3
B) 1.0 dL
C) 5.5 103 mL
D) 1.0 108 nL
Q:
Convert 35 m3 to liters.
A) 3.5 10-2 L
B) 3.5 L
C) 3.5 102 L
D) 3.5 104 L
Q:
Convert 10 cm3 to m3.
A) 1 10- 5 m3
B) 1 10-1 m3
C) 1 103 m3
D) 1 107 m3
Q:
Which of the following volumes is equal to 40 mL?
A) 40 cm3
B) 40 dm3
C) 0. 40 L
D) 0.000 40 kL
Q:
Which of the following is the lowest temperature?
A) 42C
B) 57F
C) 318 K
D) All of these temperatures are all equal.
Q:
If the melting point of vanadium metal is 1910C, what is its melting point in Kelvin temperature?
A) 1029 K
B) 1637 K
C) 2183 K
D) 3470 K
Q:
The diameter of the nucleus of an atom is approximately 1 10- 3 pm. If 1 nm is equal to 10 ngstroms, what is the diameter of the nucleus in ngstroms?
A) 1 10-23
B) 1 10-8
C) 1 10-7
D) 1 10-5
Q:
The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. What is this distance in millimeters?
A) 1.15 10- 8 mm
B) 1.15 10- 7 mm
C) 1.15 1013 mm
D) 1.15 1017 mm
Q:
Convert 4 m to meters.A) 4 10-9 mB) 4 10-6 mC) 4 10-3 mD) 4 106 m
Q:
A student weighed 30.00 g of sulfur in the lab. This is the same mass asA) 3.000 10- 8 g.B) 3.000 10- 5 kg.C) 3.000 10-5 mg.D) 3.000 104 ng.
Q:
The mass of a single zinc atom is 1. 086 10-22 g. This is the same mass asA) 1.086 10-16 mg.B) 1.086 10-25 kg.C) 1.086 10-28 g.D) 1.086 10-31 ng.
Q:
The mass of a proton is 1.67 10-27 kg. What is the mass of a proton in picograms?
A) 1.67 10- 18 pg
B) 1.67 10- 15 pg
C) 1.67 10- 12 pg
D) 1.67 10- 9 pg
Q:
Which of the following is the greatest mass?A) 1000 gB) 1.000 10-4 kgC) 1.000 10-4 cgD) 1.000 10-8 Mg
Q:
Without using a calculator, solve the following problem: A) 1 106
B) 1 100
C) 1 10-12
D) 1 10-18
Q:
Without using a calculator, solve the following problem: A) 1 10-4
B) 1 105
C) 1 1023
D) 1 1032
Q:
What symbol is used to represent the factor 101?A) MB) daC) D) n
Q:
All of the following elements are nonmetals except
A) barium.
B) carbon.
C) hydrogen.
D) oxygen.
Q:
Which of the following elements is a good conductor of heat and electricity?
A) carbon
B) chlorine
C) neon
D) aluminum
Q:
Which of the following elements is classified as a semimetal?
A) calcium
B) boron
C) fluorine
D) uranium
Q:
Which of the following elements is not a solid at room temperature?
A) Ag
B) Al
C) Xe
D) Fe
Q:
Which of the following elements is a gas at room temperature?
A) bromine
B) carbon
C) helium
D) sodium
Q:
Which of the following elements has chemical properties similar to tellurium?
A) fluorine
B) hydrogen
C) nitrogen
D) sulfur
Q:
Barium belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
Q:
Argon belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
Q:
Iodine belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
Q:
Cesium belongs to the ________ group of the periodic table.
A) alkali metal
B) alkaline earth metal
C) halogen
D) noble gas
Q:
Which element has the chemical symbol, S?
A) selenium
B) silicon
C) sulfur
D) scandium
Q:
Which element has the chemical symbol, Ru?
A) rubidium
B) ruthenium
C) rutherfordium
D) rhodium
Q:
What is the chemical symbol for copper?
A) Co
B) Cr
C) Cu
D) C
Q:
What is the chemical symbol for mercury?
A) Ag
B) Au
C) Hg
D) Pb
Q:
What is the chemical symbol for titanium?
A) Th
B) Ti
C) Tl
D) Tm
Q:
To the correct number of significant figures, what is the level of the liquid in the buret? A) 0.2 mL
B) 0.29 mL
C) 0.3 mL
D) 0.35 mL
Q:
To the correct number of significant figures, what is the volume of the liquid in the graduated cylinder? A) 7 mL
B) 7.0 mL
C) 7.7 mL
D) 8 mL