PHS 112: Test 3
What is the formula weight of the mineral apatite [(Ca3 CPO4)2] x 3(H2O)?
364 (Multiply the # shown in the formula for each element and proceed to add all of the number together) (Ca = 40 x 3; P = 2 x 31; O = 11 x 16; and H = 6 x 1) (120 + 176 + 62 + 6 = 364)
The spongy-like clumps of material in the water process that are sent to the settling basin are: A. "floc" B. "flax" C. "flocoag"
A. "floc"
How many atoms of oxygen are in "Al2 (SO4)3? A. 12 B. 7 C. 4 D. 1
A. 12
Identify the number of protons, neutrons, and electrons in an atom of (^19 [underneath 19: 9] F): A. 9 protons, 10 neutrons, and 9 electrons B. 9 protons, 10 neutrons, and 10 electrons C. 9 protons, 19 neutrons, and 9 electrons D. 10 protons, 9 neutrons, and 10 electrons
A. 9 protons, 10 neutrons, and 9 electrons
Air is considered to be a homogeneous mixture that is 79% nitrogen gas, 20% oxygen gas and 1% al the other gases. In this mixture, nitrogen can be considered: A. A solvent B. A solute C. A solution D. Saturated
A. A solvent
The chemical symbol for silver is: A. Ag B. Au C. Pt
A. Ag
Hydrocarbons with single carbon-to-carbon bonds are known as: A. Alkanes B. Alkenes C. Alkynes D. Aromatic hydrocarbons
A. Alkanes
When a white solid is heated strongly, it becomes a clear liquid. When cooled, the liquid returns to a white solid with the same properties as the original substance. This substance is most likely: A. An element B. A compound C. A mixture D. Phlogiston
A. An element
He invented the naming system for chemical elements: A. Berzelius B. James Chadwick C. Gay-Lussac
A. Berzelius
The chemical symbol for carbon is: A. C B. Cr C. Co
A. C
The empirical formula for benzene (C6H6) is: A. CH B. C2H2 C. C3H3 D. C6H6
A. CH
A shorthand method used to represent one atom of an element is a: A. Chemical symbol B. Coefficient C. Chemical formula D. Subscript
A. Chemical symbol
The vessel that contains more than 100,000 gallons of drinkable water that is used to keep the tall water tank in most cities filled for distribution to customers is the: A. Clear well B. Clarifier C. Filter feed tank
A. Clear well
The reaction: Potassium chlorate ----> Potassium chloride and oxygen gas is an example of: A. Decomposition B. Combination C. Replacement D. Ion exchange
A. Decomposition
Organic compounds responsible for flavors in fruits and the scent of flowers are: A. Esters B. Ethers C. Alcohols D. Ketones
A. Esthers
A compound having six carbon atoms linked in a chain would be named using which of the following prefixes? A. Eth- B. Hex- C. Hept- D. Prop-
A. Eth-
In nuclear ____________, the nuclei of light isotopes combine to produce heavy elements. A. Fusion B. Synthesis C. Fission
A. Fusion
Which of the following elements was named after the place of discovery? A. Hafnium B. Tungsten C. Lithium D. Sodium
A. Hafnium
Elements in the same group in the periodic table: A. Have similar chemical properties B. Are called isotopes C. Have consecutive atomic numbers
A. Have similar chemical properties
A bottle of whiskey contains 40% alcohol by volume. This means that the whiskey contains 40 mL of alcohol... A. In every 100mL of whiskey B. Mixed with 100mL of water C. Mixed with 60mL of whiskey D. In every 140 mL of whiskey
A. In every 100mL of whiskey
Developed the term "Electronegativity" and advocated use of vitamin C daily. A. Linus Pauling B. Michael Faraday C. Pauli
A. Linus Pauling
He showed relation between electricity and chemical activity: A. Michael Faraday B. Niels Bohr C. Robert Boyle
A. Michael Faraday
The chemical symbol for nitrogen is: A. N B. Ni C. Ne
A. N
Elements with no orbitals available for bonding are: A. Noble gases B. Transition metals C. Alkali metals
A. Noble gases
A location, sub-sublevel, or "place" where no more than 2 electrons live is a(n): A. Orbital B. Sub-shell C. Octet
A. Orbital
The ability of an element to combine with another element is: A. Oxidation number B. Reduction number C. Ionization number
A. Oxidation number
The electronegative element on the Pauling scale that is the most abundant is: A. Oxygen B. Fluorine C. Cesium
A. Oxygen
The atomic number of an element is the number of: A. Protons B. Protons and Neutrons C. Protons and Electrons D. All the particles in the atom
A. Protons
An empirical formula indicates: A. The relative number of atoms in a molecule B. The molar mass of a molecule C. Low atoms are bonded in a molecule
A. The relative number of atoms in a molecule
Chemical formulas are: A. The vocabulary of chemistry B. The statements of chemistry C. The theories of chemistry
A. The vocabulary of chemistry
Bottled water quality is regulated by: A. U.S. Food and Drug Administration B. U.S. Department of Commerce C. U.S. Department of Energy
A. U.S. Food and Drug Administration
When wine "goes bad" the ethanol is converted into: A.) CH3 COOH (vinegar) B.) CH OCH3 (methyl-methyl ether) C.) CH3 CH2 OH (ethanol) D.) CH3 OH (methanol)
A.) CH3 COOH (vinegar)
What is the formula weight of limestone, Ca CO3, when Ca = 40, C = 12, and O = 16? A. 110 B. 100 C. 124
B. 100 (Multiply the # shown in the formula for each element and proceed to add all of the number together) (Ca = 1 x 40; C = 1 x 12; and O = 3 x 16) ( 40 + 12 + 48 = 100)
The formula weight of methane, CH4 is (C = 12, H = 1): A. 13u B. 16u C. 52u D. None of these
B. 16u
The number of bonds between the carbon atoms in C2H2 is: A. 4 B. 3 C. 2 D. 1
B. 3
How many neutrons are in the nucleus of Copper (Cu, where mass number is 64 and the atomic number is 29)? A. 93 B. 35 C. 45
B. 35 Subtract mass number from atomic number: (64 - 29 = 35)
Forms of an element that have different structures and properties are called: A. Isotopes B. Allotropes C. Isomers D. Mixtures
B. Allotropes
A substance that cannot be decomposed by ordinary chemical reactions is: A. A compound B. An element C. A mineral
B. An element
The ___________ ___________ is the number of protons in an element: A. Mass Number B. Atomic Number D. Oxidation Number
B. Atomic Number
The mass number is the same as this: A. Atomic number B. Atomic weight C. Formula weight
B. Atomic weight
The chemical symbol for gold is: A. Ag B. Au C. Pt
B. Au
The immediate danger of home treatment of water is that the filter unit must be replaced at the recommended time interval to prevent the growth of: A. Fungi B. Bacteria C. Mold
B. Bacteria
____________ dating is a process for finding the age of organic relics. A. COBALT B. CARBON C. CESIUM
B. CARBON
The empirical formula of C4 H8 is: A. CH B. CH2 C. C4 H8 D. C2 H4
B. CH2 Just simplify the numbers
Which of the following is an empirical formula? A. C4H6 B. CH2O C. C3H6 D. C6H12O6
B. CH2O
This substance is added to raw water to eliminate bacteria and render it drinkable: A. Fluorine B. Chlorine C. Bromine
B. Chlorine
The reaction 2Mg + O2 ------> 2MgO is an example of: A. Oxidation B. Combination C. Combustion D. All of these
B. Combination
Groups or aggregates of atoms in a definite ratio are called: A. Polymers B. Compounds C. Minerals
B. Compounds
The substance used to kill bacteria in raw water is called: A. Herbicide B. Disinfectant C. Bacterifile
B. Disinfectant
Drinking water regulations are the responsibility of the: A. DPA B. EPA C. WPA
B. EPA
All of the following are located in the nucleus of the atoms EXCEPT: A. Protons B. Electrons C. Neutrons
B. Electrons
A pure substance that can not be decomposed into simpler substances by chemical means is a: A. Mixture B. Element C. Compound D. Solution
B. Element
Bottled water is an alternative source of drinking water, but it is: A. Reasonable B. Expensive C. Cheap
B. Expensive
The most electronegative element on the Pauling electronegativity scale is: A. Oxygen B. Fluorine C. Cesium
B. Flourine
The molecular weight is sometimes the same as the: A. Atomic weight B. Formula weight C. Empirical weight
B. Formula weight
Developed law implying "atomic numbers are more important than atomic weights: A. Berzelius B. H. J. Moseley C. Pauli
B. H. J. Moseley
The ______________ of a radioactive isotope is the time required for half of the nuclei in a sample to decompose. A. Half-cycle B. Half-life C. Half-pulse
B. Half-life
The principle that the velocity or energy of an electron and its location can not be measured simultaneously isL A. Bohr's Aufbau principle B. Heisenberg Uncertainty principle C. Pauli's exclusion principle
B. Heisenberg Uncertainty principle
The energy required to remove an electron from an atom in the gaseous state is called the: A. Chelation energy B. Ionization energy C. Catalytic energy
B. Ionization energy
The energy required to to remove an electron from an atom in the gaseous state is called the: A. Chelation energy B. Ionization energy C. Catalytic energy
B. Ionization energy
Fe is the symbol for: A. Fluorine B. Iron C. Fermium D. Indium
B. Iron
He discovered "neutrons": A. Berzelius B. James Chadwick C. Avogadro
B. James Chadwick
Which of the following is the correct symbol for potassium? A. P B. K C. Pt D. Pd
B. K
Treatment of unsafe water in emergency situations involves the use of: A. Water softener B. Liquid chlorine bleach C. Heating water to a "hot-to-touch" temperature
B. Liquid chlorine bleach (not a lot)
The chemical symbol for oxygen is: A. Ox B. O C. Oy
B. O
Chemical equations are: A. The vocabulary of chemistry B. The statements of chemistry C. The theories of chemistry
B. The statements of chemistry
Which of the following substances is a mixture? A. Ice B. Vodka C. Salt B. Aluminum
B. Vodka
A mole of sodium chloride is: A. 6.02 x 10^23 ions B. 6.02 x 10^23 molecules C. 1.20 x 10^24 ions
C. 1.20 x 10^24 ions
What is the formula weight of the sugar (C12 H22 O11) used in your morning coffee when the weights are: C = 12, H = 1, and O = 16? A. 352 B. 276 C. 342
C. 342 (Multiply the # shown in the formula for each element and proceed to add all of the number together) (C = 12 x 12; H = 22 x 1; and O = 11 x 16) ( 144 + 22 + 176 = 342)
Sodium hydroxide, an alkali, is used to maintain a pH in the discharge of water of: A. 10-12 B. 4-5 C. 7-8
C. 7-8
The most widely used point-of-use (POU) system for home treatment of water is: A. Activated sulfur filtration B. Activated cobalt filtration C. Activated carbon filtration
C. Activated carbon filtration
A mole is numerically equal to: A. Barreto's Number B. Columbo's Number C. Avogadro's Number
C. Avogadro's Number
Sandra Hoy wrote the poem entitled Ode to a Chemical ________: A. Formula B. Compound C. Bond
C. Bond
The least electronegative element on the Pauling electronegativity scale is: A. Oxygen B. Fluorine C. Cesium
C. Cesium
A combination of symbols that represents the composition of a compound is a(n): A. Oxidation number B. Polyatomic ion C. Chemical formula D. Isotope
C. Chemical formula
Water solutions of ionic substances that conduct electricity are called: A. Electrical solutions B. Polar solutions C. Electrolytes D. Indicators
C. Electrolytes
In Nuclear ___________, an isotope of a heavy element is split into lighter elements, releasing a large amount of energy. A. Fusion B. Synthesis C. Fission
C. Fission
He proposed the name "isotopes": A. H. J. Moseley B. Pauli C. Frederick Soddy
C. Frederick Soddy
The chemical symbol for hydrogen is: A. Hf B. He C. H
C. H
Developed principle involving determination of electron's velocity and location simultaneously: A. Linus Pauling B. Henri Becquerel C. Heisenberg
C. Heisenberg
Which scientist discovered radioactivity? A. Max Planck B. Marie Curie C. Henri Becquerel
C. Henri Becquerel
Developed and advocated the use of atomic structure theory in chemistry: A. James Chadwick B. Frederick Soddy C. Niels Bohr
C. Niels Bohr
Eighty-eight (88) of the 100-odd chemical elements: A. Are produced in the lab B. Come from nuclear reactions C. Occur naturally
C. Occur naturally
The reaction: (2NaC i2. ------> NaC i2 + i2) is an example of: A. Decomposition B. Combination C. Replacement D. Ion exchange
C. Replacement
Wrote the book "Skeptical Chemist" and developed definition of element: A. Heisenberg B. Linus Pauling C. Robert Boyle
C. Robert Boyle
Isotopes of an element are atoms that have: A. The same number of protons, but a different number of electrons. B. The same number of neutrons, but a different number of protons. C. The same number of protons, but a different number of neutrons. D. Equal numbers of protons and neutrons.
C. The same number of protons, but a different number of neutrons.
Which of the following are the properties of basic solutions? A. They turn the dye litmus red. B. They taste sour C. They feel slippery D. They react with active metals to produce hydrogen gas
C. They feel slippery
How many formula units are represented by 3K2(SO3): A. One B. Two C. Three D. Four
C. Three (Note: Number is in the front of the formula)
An ionic bond involves: A. Sharing of electrons B. Splitting of electrons C. Transfer of electrons
C. Transfer of electrons
The number of oxygen atoms in Al2(SO4)3 is: A. 3 B. 4 C. 7 D. 12
D. 12
What is the number of atoms on each side of (CH4 + 2O2) ---> (CO2 + 2H2 C2)? A. 5 B. 6 C. 7 D. 9
D. 9
Metals are substances that are: A. Malleable B. Are good conductors of heat and electricity C. Have luster D. All of these
D. All of these
Neutral atoms of a given element is the number of: A. Number of protons B. Atomic number C. Number of electrons D. All of these are true
D. All of these are true
Which of the following are the properties of acidic solutions? A. They turn the dye litmus red. B. They taste sour C. They react with active metals to produce hydrogen gas D. All of these are true
D. All of these are true
Which of the following is an organic compound? A. KNO3 B. H2SO4 C. MgO D. C2H2
D. C2H2
Which of the following elements is correctly matched with its symbol? A. Gold - Gd B. Sodium - So C. Calcium - C D. Copper - Cu
D. Copper - Cu
Developed principle concerning the occupancy of electrons in an orbital: A. Heisenberg B. Pauli C. Robert Boyle
D. Pauli
How many bromine atoms are represented by 3Ca(BrO3)2? A. One B. Two C. Three D. Six
D. Six
For the formula of a compound to be correct, the algebraic addition of the charges on the atoms or ions in the compound must add up to: A. A sum equal to the number of elements B. A sum one less than the number of elements present C. A sum one greater than the number of elements present D. Zero
D. Zero
