Chemistry study guide for test 8
What is the ending for the names of all binary compounds, both ionic and molecular
-ide
How many moles are present in 21.2 g hydrochloric acid
0.582 mol
How many single covalent bonds can halogens have
1
How many molecules are in 2.10 mol CO2
1.26 x 10^24 molecules
Which is the correct molar mass for the compound iron 2 sulfate
151.85g/mol
Which is the percent composition of phosphorus in zinc phosphate
16.1%
How many grams of phosphorus are in 500 grams of calcium phosphide
170.1 grams
How many valence electrons does helium Atom have
2
What is the charge on a strontium Ion
2+
What is the percent composition of chromium in BaCrO4
20.5%
What is the mass of 2.25 moles of sulfuric acid
220g
How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O
35
A sample of Magnese two chloride has a mass of 19.8 g before heating and 12.6 g after heating until all the water is driven out. Based on this information how many water molecules are attached to each molecule of Magnis two chloride
4
How many atoms are in 0.075 mol of titanium
4.5 x 10^22
Which is the molar mass of the element calcium
40.078 g/mol
Which is The mass of eight moles of sodium chloride
468 grams
How many valence electrons are in an atom of phosphorus
5
What is the mass in grams of 5.90 mol C8H18
673 g
What is the molar mass of calcium hydroxide
74.092 g/mol
Which is the percent composition of bromine in the compound sodium bromide
77.7%
How many moles of tungsten atoms are in 4.8 x 10^25
8.0 x 10^1 moles
What is the percent composition of carbon in heptane C7H16
84%
What is the molar mass of (NH4)2CO3
96g
And ionic bond is a bond between
A cation and an anion
An -ate or -ite at the end of a compound name usually indicates that the compound contains
A polyatomic anion
What is the formula unit of aluminum oxide
Al2O3
Which two are isotopes of one another
Atoms 1 and 4
Which is not a diatomic molecule
Boron
The name of a hydrate is calcium chloride dihydrate. What is the formula
CaCl2.2H2O
How are chemical formulas of binary ionic compounds generally written
Cation on the left anion on the right
A molecule with a single covalent bond is
Cl2
What is the correct name for the compound CoCl2
Cobalt (II)chloride
Which of the following is the correct name for N2O5
Dinitrogen pentoxide
A depiction of valence electrons around the symbol of an element
Electron dot structure
What does an -ite or -ate ending in a polytomic ion mean
Oxygen is in the formula
Which of the following compounds contains the lead (II) ion
PbO
Which term is described as the percent by mass of any element in a conpound
Percent composition
Which element has a molar mass of 30.974 g/mol
Phosphorus
In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by
Prefixes
Which has a charge of +1
Proton
When naming a transition metal ion that can have more than one common ionic charge, the numerical value of the charge is indicated by a
Roman numeral Following the name
Select the correct formula for sulfur hexafluride
SF6
Which of the following formulas represents a molecular compound
SO2
A compound held together by ionic bonds is called a
Salt
Which type of bond has one pair of electrons shared between atoms
Single covalent
In which of the following is the name and formula given correctly
Stannic fluoride SnF4
What is shown by the structural formula of a molecule or polyatomic ion
The arrangement of bonded atoms
Which elements can form diatomic molecules joined by a single covalent bond
Hydrogen and the halogens only
Which is the correct name for the hydrate whose composition is shown
Iron (III) phosphate tetrahydrate
How does calcium obey the octet rule when reacting to form compounds
It gives up electrons
Which element, when combined with fluorine, would mostly likely form an ionic compund
Lithium
The mass of a mole of NaCl is the
Molar mass
Avogadro's number of representative particles is equal to one
Mole
What SI unit is used to measure the number of representatives particles in a substance
Mole
What is the SI base unit used to measure the amount of a substance
Mole
What is the formula for sodium sulfate
Na2SO4
What is the formula unit of sodium nitride
Na3N
Which of these elements does not exist as a diatomic molecule
Ne
What is the correct name for the N3- ion
Nitride ion
Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules
Non bonding pair/unshared
Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number
Nona- 9
Which of the following diatomic molecules is joined by double covalent bond
O2
Atoms react so as to acquire the stable electron structure of noble gas
Octet rule
What is true about the molar mass of chlorine gas
The molar mass is 71.0 g
What is the correct name for Sn3(PO4)2
Tin (II)phosphate
Which set of chemical name and chemical formula for the same compound is correct
Tin (IV) bromide SnBr4
Molecular compounds are usually
Two or more nonmetallic elements
An electron in the highest occupied energy level of an atom
Valence electron
What is the name given to the electrons in the highest occupied energy level of an Atom
Valence electrons
