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WorksheetsChemistry Chapter 7 Review
Total questions: 25
Worksheet time: 13mins
What follows an element’s symbol in a chemical formula to indicate the number of atoms of that element in one molecule of the compound?
charge sign
superscripted number
number in parentheses
subscripted number
What is the correct name for the NO3- ion?
nitrate
nitrite
nitride nitrite
nitrogen oxide
What is the correct formula for copper(I) cyanide?
CuCy
CuCy2
CuCN
Cu2CN
What is the correct name for the acid CH3COOH?
carbonic acid
carbonate acid
acetic acid
acetous acid
What is the correct name for the compound P2Cl4.
phosphorus chloride
phosphorus tetrachloride
diphosphorus chloride
diphosphorus tetrachloride
What is the correct formula for the compound made of magnesium (Mg2+) and nitrogen (N3-)?
Mg2N3
Mg3N2
MgN2
MgN
Oxidation numbers are used to indicate the
charge on an ion.
number of atoms or ions in a compound.
type of bond holding particles together in a compound.
distribution of electrons among the bonded particles in a compound.
Atoms have an oxidation number of zero in a(n)
pure element.
acid.
ionic compound.
molecular compound.
What is the oxidation number of nickel in NiCO3?
0
+1
+2
+3
What is the correct name for the compound Ni2O3 using the Stock system?
nickel(II) oxide
dinickel trioxide
nickel trioxide
nickel(III) oxide
What is the oxidation number of phosphorus in the PO43- ion?
-3
0
+5
+8
What is the correct formula for the compound platinum(VI) fluoride?
PtF3
PtF6
Pt6F2
Pt6F
The molar mass of any compound is described in units of
grams
u
moles
grams per mole
The simplest whole-number ratio of moles of each element in a compound is known as the
percent composition.
empirical formula.
Stock formula.
molecular formula.
Using the Stock system of nomenclature, Cr2(SO4)3 is named
chromium(II) sulfate.
chromic sulfate.
dichromium trisulfate.
chromium(III) sulfate.
In a polyatomic ion, the algebraic sum of the oxidation numbers of all atoms is equal to
0
10
the number of atoms in the ion.
the charge on the ion.
The first part of the name of a binary ionic compound is the
cation (positive ion).
polyatomic ion (multiple element ion).
oxyanion (ion w/ Oxygen).
anion (negative ion).
The molar mass of water is equal to
1 g of O plus 2 g of H.
1 g of O plus 1 g of H.
the mass of 1 mol of O plus the mass of 1 mol of H.
the mass of 1 mol of O plus the mass of 2 mol of H.
What is the molar mass of pure tin?
1.00 g/mol
47.88 g/mol
118.71 g/mol
237.42 g/mol
How many moles of compound are there in 15.0 g of potassium dichromate, K2Cr2O7? (The molar mass of K2Cr2O7 is 294.2 g.)
0.0510 mol
11.0 mol
15.0 mol
294 mol
What is the mass percentage of cobalt in cobalt(II) fluoride, CoF2?
33.33%
39.20%
60.80%
96.93%
What is the mass of 4.80 mol of barium hydride, BaH2?
4.80 g
29.0 g
139 g
669 g
What is the empirical formula for a compound that contains 12.62% Li, 29.17% S, and 58.21% O?
LiSO2
LiS2O6
Li2SO4
Li2SO3
What is the molecular formula for the compound with a formula mass of 58.12 u and an empirical formula of C2H5?
C2H5
C4H10
C6H15
C8H20
What is the molecular formula for the compound that is made up of 30.45 g N and 69.55 g O, and has a formula mass of 92.02 u?
NO
N2O2
NO2
N2O4
