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Physical Science Classwork 03/16/17
Writing Names of Molecular Compounds from Names - P. 570
PS.17
CHANGING BINARY MOLECULAR FORMULAS INTO NAMES.
a. Name the more positive element (the first one) first. If there are more than one atom of this element, put the correct Greek
prefix before the name.
b. Name the more negative element (the last one) last. Change its name to end in -ide. If there are more than one atom of this
element, put the correct Greek prefix before the name.
1) Which of the following correctly shows a prefix used in naming binary molecular compounds, with
its corresponding number?
A) hexa-, 8
B) octa-, 4
C) nona-, 9
D) hepta-, 10
E) deca-, 7
2) Give the correct name for the compound PBr3.
2)
3) Give the correct name for the COMPOUND NO3 . (Notice - there is no
3)
4) Give the correct name for the compound N2 O3 .
4)
5) Give the correct name for the compound N2 O4 .
5)
6) Give the correct name for the compound S2 O5
6)
1)
negative sign, so it is NOT an ion.)
HYDRATES - P. 571
7) A hydrate is an ionic coupound (a crystal) that has one or more molecules of ________________________
attached to each crystal.
8) A term that means "without water" is ________________________.
9) How can you drive the water out of a hydrate? By ________________________. _________ _________
10) Which of the following correctly shows the formula for a hydrate?
A) MgSO4 (H2 O)7
B) H2 O
C) H2 O2
D) MgSO4 · 7H2O
11) How many water molecules are in four formula units of calcium chloride dihydrate
(CaCl2 · 2H2 O)?
11)
CHEMICAL REACTIONS - P. 582
12) The process in which the atoms of one or more substance are rearranged to form different
substances is called a(n) ____________________.
A) nuclear reaction
B) substantiation
C) chemical reaction
D) physical reaction
13) Chemical reactions _____.
A) produce new substances
C) create and destroy atoms
14) A starting substance in a chemical reaction _____.
10)
12)
13)
B) only occur outside living organisms
D) occur only in living organisms
14)
15) A substance formed during a chemical reaction _____.
15)
16) In the chemical reaction in which carbon, hydrogen, and oxygen absorb heat and combine to form
carbon dioxide and water, which of the following is considered to be a reactant?
A) water
B) heat
C) oxygen
D) carbon dioxide
16)
17) The chemical formula of a compound indicates the _____.
A) identity of the elements in the compound only
B) three-dimensional structure of the compound
C) type and arrangement of the bonds in the compound
D) identity and relative proportions of the elements in the compound
17)
18) In the following chemical formula, H2SO4, the numeral 2 is called a ____.
18)
A) multiplier
B) superscript
C) coefficient
D) subscript
19) What does a subscript in a chemical formula indicate?
A) the number of atoms of the element it comes after
B) the number of neutrons
C) the number of protons
D) the number of atoms of the element it comes before
19)
WRITING EQUATIONS.
20) In the chemical equation, H2 O2
H2 O + O2 , the H 2O2 is a _____.
21) In the chemical equation, H2 O2
H2 O + O2 , the H 2O is a _____.
A) reactant
A) catalyst
B) gas
C) solid
B) product
C) solid
20)
D) catalyst
E) product
21)
D) reactant
22) A number written in front of a chemical formula _____.
A) reactant
B) coefficient
C) precipitate
E) gas
23) In the following chemical formula, 10 Al (C2 H3O2)3 . the numeral 10 is called a ____.
24) The symbol
means
B) an incomplete combustion reaction
D) that a gas is formed by the reaction
26) What does (s) mean in a chemical equation? ________________________________________.
means ____________________________________________________.
28) What does (l) mean in a chemical equation? ________________________________________.
29) What does (g) mean in a chemical equation? ________________________________________.
30) The symbol
23)
________________________________________.
25) This symbol indicates _____.
A) that the reaction is reversible
C) that heat must be applied
27) The symbol
22)
D) product
means ____________________________________________________.
25)