Chapter 3 – 1768 words – Chemistry – Flashcards
Flashcard maker : Roman Peck
What is the difference between a compound and a mixture?
A compound always has the same ratio of elements. A mixture can have any ratio of elements.
An ionic bond is best described as:
the transfer of electrons from one atom to another.
A covalent bond is best described as:
the sharing of electrons between atoms.
Which statement is true?
A covalent bond involves sharing of electrons between two atoms.
What is the empirical formula for C4H10O2?
C2H5O
What is the empirical formula for Hg2(NO3)2?
HgNO3
Li2SO4
2 lithium atoms, 1 sulfur atom, and 4 oxygen atoms.
SrCl2
1 strontium atom and 2 chlorine atoms.
Which of the following is an atomic element?
Mg
Which of the following is a molecular element
S
Which of the following is a molecular element?
I
Which of the following is a molecular compound?
CH3Cl
Which of the following is an ionic compound?
LiCl
Which of the following is a molecular compound?
P4O10
Which of the following is an ionic compound?
Mg3(PO4)2
Which of the following elements has the least tendency to form an ion
Ar
Identify the compound with covalent bonds.
CH4
Identify the elements that have molecules as their basic units.
nitrogen
hydrogen
oxygen
hydrogen
oxygen
Write the formula for the compound formed between potassium and sulfur
K2S
Give the name for SnO
tin (II) oxide
Give the name for NaNO3.
sodium nitrate
Write the formula for barium nitrite.
Ba(NO2)2
Write the formula for strontium nitride.
Sr3N2
Determine the name for TiCO3. Remember that titanium forms several ions.
titanium (II) carbonate
Give the formula for sodium chlorate.
NaClO3
Write the name for Sn(SO4)2. Remember that Sn forms several ions.
tin (IV) sulfate
Determine the name for CoCl2•6H2O. Remember that Co forms several ions.
cobalt (II) chloride hexahydrate
Write the name for Ca3(PO4)2.
calcium phosphate
Give the correct formula for aluminum sulfate.
Al2(SO4)3
Write the formula for copper (II) sulfate pentahydrate.
CuSO4•5H2O
In which set do all elements tend to form anions in binary ionic compounds?
Se, F, Cl
Which one of the following compounds contains ionic bonds?
MgO
In which set do all elements tend to form cations in binary ionic compounds?
Mg, Cr, Pb
What is the chemical formula for barium hydroxide?
Ba(OH)2
What is the chemical formula for strontium hydride?
SrH2
The chemical formula for rubidium peroxide is
Rb 2O2
The chemical formula for the selenite ion is
SeO 3 2- .
What is the proper systematic name for the ionic compound KClO4?
potassium perchlorate
Determine the name for H2CO3.
carbonic acid
Determine the name for aqueous HBr.
hydrobromic acid
Give the formula for sulfurous acid.
H2SO3
Identify the formula for nitric acid.
HNO3
Determine the name for P4O10.
tetraphosphorus decoxide
Determine the name for Cl2O.
dichlorine monoxide
Determine the name for HClO3.
chloric acid
Calculate the molar mass for Mg(ClO4)2.
223.21 g/mol
Calculate the molar mass of Al(C2H3O2)3.
204.13 g/mol
Calculate the molar mass of Ca3(PO4)2.
310.18 g/mol
How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.
9.83 × 1020 C2H4 molecules
What is the mass, in kg, of 6.89 × 1025 molecules of CO2? The molar mass of CO2 is 44.01 g/mol.
5.04 kg
How many moles of N2O3 contain 2.55 × 1024 oxygen atoms?
1.41 moles N2O3
What mass of sulfur tetrafluoride, SF 4 , has the same number of fluorine atoms as 25.0 g of oxygen difluoride, OF
25.0 g
Calculate the mass percent composition of sulfur in Al2(SO4)3.
28.12 %
Calculate the mass percent composition of lithium in Li3PO
17.98 %
How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.
9.52 × 1020 sodium ions
How many atoms of oxygen are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.
1.10 × 1024 O atoms
How many anions are there in 2.50 g of MgBr2?
1.64 × 10 22 anions
Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of c2h5o2
C6H15O6
Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO2.
N2O4
Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
N2O3
Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.
PCl3
Determine the empirical formula for a compound that contains C, H and O. It contains 51.59% C and 35.30% O by mas
C2H6O
Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.
C18H27NO3
Combustion analysis of 63.8 mg of a C, H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?
C3H6O
Write a balanced equation to show the reaction of sulfurous acid with lithium hydroxide to form water and lithium sulfite.
H2SO3(aq) + 2 LiOH(aq) ? 2 H2O(l) + Li2SO3(aq
Write a balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapor
2 C2H6(g) + 5 O2(g) ? 4 CO(g) + 6 H2O(g)
Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate
Al(C2H3O2)3(aq) + (NH4)3PO4(aq) ? AlPO4(s) + 3 NH4C2H3O2(aq
Aluminum metal reacts with iron(II) sulfide to form aluminum sulfide and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?
2
Which quantity or quantities must always be the same on both sides of a chemical equation?
the number of atoms of each kind
the sum of the masses of all substances involved
the sum of the masses of all substances involved
Identify the principal component of natural gas.
methane
