Section 1
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A compound that is composed of carbon, hyrdogen, and oxygen contains 70.6% Carbon, 5.9% Hydrogen, and 23.5% Oxygen. The molecular wight of the compound is 136 amu. What is the molecular formula
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Section 1
(50 cards)
A compound that is composed of carbon, hyrdogen, and oxygen contains 70.6% Carbon, 5.9% Hydrogen, and 23.5% Oxygen. The molecular wight of the compound is 136 amu. What is the molecular formula
C8H8O2
How many grams of CH4 are required to produce 43 g of Cu according to the following equation 4CuO + CH4 --> CO2 + 2H2O + 4Cu
2.7 g CH4
what is the sum of the coefficients in the following reaction: C3H8 + 5O2 ---> 3CO2 + 4H2O A. 10 B. 13 C. 17 D. 29
B. 13
The empirical formula for a compound is CH2O, and the molar mass in 180.2 g/mol. Which is the molecular formula for this compound A. C6H12O6 B. C7H16O5 C. C8H22O4 D. C3H6O3
A. C6H12O6
Which of the following can represent a molecular as opposed to an empirical formula A. P4O10 B. C2H2 C. C6H12O6 D. All of the above
D. All of the above
in balancing a chemical equation, which of the following are you allowed to do a. change subscripts b. write coefficients c. change superscripts d. add new substances
b. write coefficients
In the balanced equation 2H2 + O2 --> 2H2O A. 2 moles of hydrogen react with 1 mole of oxygen B. 4 moles of hydrogen act with 1 mole of oxygen C. 2 moles of hydrogen react with 2 moles of oxygen D. 4 moles of water are produced
A. 2 moles of hydrogen react with 1 mole of oxygen
Identify specific reaction C3H8 + 5O2---> 3CO2 + 4H2O
combustion
which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water A. decomposition B. doubles replacement C. synthesis D. Combustion
d. Combustion
An experiment requires 64.38 of Ca(OH)2. How many particles of Ca(OH)2 are present in the experiment?
5.230 x 10^23 particles Ca(OH)2
What is the percent composition of Calcium Chloride
36.1% Calcium 63.9% Chlorine
What is the empirical formula of a compound that contains 29% sodium, 41% sulfur, and 30% oxygen
Na2S2O3
The number of atoms in one mole of an element is equal to A. A liter B. a gram C. A formula unit D. Avogadro's number
D. Avogadro's number
What is the empirical formula of a compound that contains 27.0% Sulfur, 13.4% and 59.6% Chlorine
SOCl2
Identify specific reaction Zn + CuSO4 ---> ZnSO4 + Cu
single replacement
How many grams of Al will be produced for 21.3 moles of Al2O3? 2Al2O3 ---> 4Al 3O2
1150 g Al
what is the probable product of a double replacement reaction?\ a. a new compound and the replace metal b. a new compound and the replaced nonmetal c. two different compounds d. a single compound
c. two different compounds
The number of moles of each substance taking part in a chemical reaction is indicated by A. The molar mass of each substance B. the coefficients in the balanced equation C. The subscripts in the chemical formulas D. The type of reaction
B. the coefficients in the balanced equation
The scale for expressing atomic masses is based on the mass of A. Hydrogen-1 B. Carbon-12 C. Oxygen- 16 D. Helium- 2
B. Carbon-12
The molecular formula of a compound can be determined by comparing the empirical formula mass with the A. Molar mass of the compound B. Ratio of each element in the compound C. Number of molecules in a mole of the compound D. Percentage composition of the compound
A. Molar mass of the compound
What is the correct mole ratio of K3PO4 to KNO3 in the chemical reaction 3Mg(NO3)2 + 2K3PO4 ---> Mg3(PO4)2 + 6KNO3 A. 1:1 B. 2:3 C. 1:3 D. 1:2
C. 1:3
during a chemical reaction_______ A. new elements are produced b. atoms are destroyed c. atoms are rearranged d. elements are destroyed
c. atoms are rearranged
How many silver atoms are in 2.456 of Ag2CrO4?
8.907 x 10^21 atoms Ag
What is the percent composition of C2H6SO
30.7% Carbon 7.7% Hydrogen 41.1 % Sulfur 20.5% Oxygen
The coefficients in a balanced equation represent ratios of all of the following except A. Mass B. moles C. Volumes D. Molecules
A. Mass
Which compound has a molar mass of 174.3 g/mol A. K2SO4 B. Al(NO3)3 C. MgCO3 D. Ca( NO3)2
A. K2SO4
How many moles of KBr will be produced from 7 moles of BaBr2 BaBr2 + K2SO4 --> 2KBr + BaSO4
10 mol KBr
A balloon contains 4.50 x 10^22 atoms of helium gas. Calculate the mass of helium in grams.
0.299 g He
The simplest whole number ratio of atoms of the elements in a compound is given by the A. Formula mass B. molar mass C. Molecular formula D. Empirical formula
D. Empirical formula
A balanced equation verifies the law of conversation of matter because A. The molar masses of all substances are the same B. the coefficients on both sides of the equation are the same C. The mass of the reactants equals the mass of the products D. The mass of the products always equals 100 grams
C. The mass of the reactants equals the mass of the products
which types of reactions are essentially opposites of one another A. combustion and synthesis B. single replacement and double replacement C. synthesis and single replacement D. synthesis and decomposition
D. synthesis and decomposition
The sum of the atomic masses of all the atoms in a compound is called A. Formula mass B. empirical formula C. Molar volume D. Percentage composition
A. Formula mass
Which is the correct molar mass for the compound CaBr2 A. 120 g/mol B. 200 miles C. 240 grams D. 200 g/mol
D. 200 g/mol
Which hydrocarbon pair below have identical percent composition of carbon A. C3H4 and C3H6 B. C2H4 and C3H4 C. C2H4 and C4H2 D. C2H4 and C3H6
D. C2H4 and C3H6
How many grams of chlorine gas can be produced from the decomposition of 37.41 moles of AuCl3 by this reaction: 2AuCl3 ---> 2Au + 3Cl2
3984 grams Cl2
Verify the law of conversation of matter for the following reaction 2H2S + 3O2 ----> 2SO2 + 2H2O
reactants total mass= 164.2g produced total mass= 164.2g verified
Hownmany moles are in 2.25 g sample of Mg(NO3)2
0.0152 Mol Mg(NO3)2
How many copper atoms are in 0.180 moles of Copper?
1.08 x. 10^23 atoms Cu
in a combustion reaction a hydrocarbon combines with oxygen releasing what? A. carbon B. energy C. Hydrogen D. plasma
B. energy
Identify specific reaction 2H2 + O2 ---> 2H2O
synthesis
Verify the law of conversation of matter for the following reaction Al4C3 + 12HCl --> 4AlCl3 + 3CH4
Reactants total mass= 582.0g Products total mass = 582.0g verified
What is the SI base unit used to measure the amount of a substance A. Kelvin B. Kilogram C. Meter D. Mole
D. Mole
Stoichiometry is the study of ____ relationships that exist in chemical forums las and chemical reactions A. Qualitative B. subjective C. Descriptive D. Quantitative
D. Quantitative
How many grams of Fe3O4 are required to react completely with 300.0 grams of H2
8689 g Fe3O4
Given the equation N2 + 3H2 ---> 2NH3 what is the mole ratio of hydrogen to ammonia? a. 1:1 b. 1:2 c. 3:2 d. 2:3
c. 3:2
How many grams of carbon dioxide are there in 1.1183 moles of carbon dioxide
52.05 g CO2
Which is the correct molar mass for the compound FeSO4 A. 103.85 B. 151.85 C. 415.5 D. 247
B. 151.85
Which term is described as the percent by the mass of any element in a compound A. Hydrate B. molecular formula C. Empirical formula D. Percent composition
D. Percent composition
How many grams of Na2CO3 contain 1.773 x 10^17 sodium atoms?
1.561 x10^-5 grams Na2CO3
How many moles of NO are produced from 13.2 moles of oxygen gas in the presence of excess ammonia? 4NH3 + 5O2 --> 4NO + 6H20
10.6 moles NO
Section 2
(50 cards)
Write empirical formula NH4^1 + CO3^2 --->
(NH4)2CO3
Which is a physical property of ionic compounds in their solid state A. Good conductor of electricity B. weak attractive forces between ions C. Low boiling point D. High meting point
D. High melting point
finish and balance Al + NiSO4 --->
2Al + 3NiSO4 ---> Al2(SO4)3 + 3Ni
balance Al(NO3)3 + Na2S ---> Al2S3 + NaNO3
coefficients 2 + 3 ---> 1 + 6
Name CrCl3
Chromium ( III) Clhoride
Write empirical formula Sodium Chloride
NaCl
Write empirical formula Ammonium hydroxide
NH4OH
finish and balance Mg + O2 ---->
2Mg + O2 ---> 2MgO
finish and balance Zn + CuSO4 --->
Zn + CuSO4 ---> Zn(SO4) + Cu
Whcih is true of binary ionic compounds A. They consist of only two atoms B. they consist of atoms of only two elements C. They contain different anions D. They have bonds that share two valence electrons
B. they consist of atoms of only two elements
Write empirical formula Pb^2 + NO3^-1 --->
Pb(NO3)2
Which is a property of substances that exhibit metallic bonding A. High boiling points B. rigid and brittle C. Low melting points D. Poor conductor of electrcity
A. High boiling points
The basis of an ionic bond is the A. Sharing of a electron pair B. electrical attraction between oppositely charged ions C. Absorption of energy D. Absorption of water into their solid structure
B. electrical attraction between oppositely charged ions
Write empirical formula Chromium (IV) Phosphate
Cr3(PO4)4
Write Emprical Formula Na^1 + OH^-1 --->
NaOH
finish and balance C3H6 + O2---->
2C3H6 + 9O2 ----> 6CO2 + 6H2O
Nam Ba(OH)2
Barium hydroxide
Name Ag2SO4
Silver sulfate
Identify specific reaction AgNO3 + NaCl ----> AgCl + NaNO3
double replacement
Which is the correct order of bond strength, from greatest to least, for compounds MgCl2, MgO, Mg3N2 A. MgO, MgCl2, Mg3N2, B. Mg3N2, MgCl2, MgO C. MgCl2, MgO, Mg3N2 D. Mg3n2, MgO, MgCl2
D. Mg3n2, MgO, MgCl2
Write empirical formula Magnesium oxide
MgO
write and balance aluminum hydroxide reacts with nitric acid ( HNO3) to yield aluminum nitrate and water
Al(OH)3 + 3HNO3 --> Al(NO3)3 + 3H2O
Write Empirical Formula Na^1 + S^-2 --->
Na2S
Identify specific reaction H2CO3 ---> CO2 + H2O
Decomposition
Balance H2S + Fe(OH)3 ---> Fe2S3 + H2O
coefficients 3 + 2 ---> 1 + 6
An ionic compound must have an overall charge of A. +2 B. -2 C. +1 D. -1 E. 0
E. 0
Write empirical formula Iron(II) Sulfide
FeS
Name KBr
Potassium bromide
Which is a correct statement of bond strength A. Compounds with smaller atoms have weaker bond strength B. compounds with higher total numbers of atoms in the compound have greater bond strength C. Compounds containing atoms with greater charges have higher bond strength D. Compounds with a more negative lattice energy have lower bond strength
C. Compounds containing atoms with greater charges have higher bond strength
finish and balance AgNO3 + NaCl--->
AgNO3 + NaCl ----> AgCl + NaNO3
infer three peices of evidence that a chemical reaction has taken place
- temperature change - color change - odor - release of gases - formation of a solid
Write empirical formula Aluminum Niteide
AlN
finish balance CuCO3 --->
CuCo3 ---> CuO + CO2
Name NaC2H3O2
Sodium acetate
Write empirical formula Lead (II) Nitrate
Pb(NO3)2
balance Al2O3 + C + Cl2 ---> AlCl3 + CO
coefficients 1 + 3 + 3 --> 2 + 3
A cation is an ion with A. A positive charge B. a negative charge C. No charge D. More than 8 electrons
A. A positive charge
Write and balance Iron metal reacts with oxygen to produce iron III oxide
4Fe + 3O2 ---> 2Fe2O3
The basis of an ionic bond is the A. Sharing of an electron pair B. electrical attraction between oppositely charged ions C. Absorption of energy D. Absorption of water into their solid structures
B. Electrical attraction between oppositely charged ions
Balance HNO3 + CaCO3 ---> Ca(NO3)2 + CO2 + H2O
coefficients 2+ 1 ---> 1 + 1 + 1
According to the octet rule, atoms tend to lose, gain or share electrons in order to have how many electrons in its outer she'll A. 2 B. 4 C. 6 D. 8
D. 8
A compound has the formula X3Y. For every 15 X atoms present in this compound, how many Y atoms are there A. 3 B. 5 C. 45 D. 15
B. 5
finish and balance H2O ---->
2H2O ---> 2H2 + O2
Write empirical formula Zn^2 + PO4^3 --->
Zn3(PO4)2
Which is described as the force holding two atoms together A. Cation B. chemical bond C. Formula unit D. Lattice
B. chemical bond
write and balance Sodium hydroxide reacts with phosphoric acid( H3PO4) to yield sodium phosphate and water
3NaOH + H3PO4 ---> Na3PO4 + 3H2O
An empirical formula always indicates A. Which atoms are attached to which in a molecule B. how many of each atom are in a molecule C. The simplest whole number ratio of different atoms in a compound D. The isotope of each element in a compound
C. The simplest whole number ratio of different atoms in a compound
finish and balance (NH4)2S + ZnCl2 --->
(NH4)2S + ZnCl2 ---> 2NH4Cl + ZnS
A monatomic ion consist of A. More than one atom B. one atom C. No atoms
B. one atom
Name Na2S
Sodium sulfide
Section 3
(50 cards)
Find the complete ionic equation, identity the spectator ions, and write the net equation Aqueous barium iodide and sodium sulfate combine to form a barium sulfate precipitate
Complete equation = BaI2(aq) + Na2SO4(aq) ---> BaSO4(s) + 2NaI(aq) Ionic equation= Ba^2(aq) + 2I^-1(aq) + 2Na^1(aq) + SO4^-2(aq) ---> BaSO4(s) + 2Na^1(aq) + 2I^-1(aq) Spectator ions= I^-1(aq) and Na^1(aq) Net equation= Ba^2(aq) + SO4^-2 ---> BaSO4(s)
Write chemical formula Carbon tetra chloride
CCl4
Which one of the following does not occur as a diatomic molecule in elemental form? A. Oxygen B. nitrogen C. Sulfur D. Hydrogen
C. Sulfur
Find electro negativity and name bond type Sulfur and oxygen
1.0/ polar
Which two bonds are most similar in polarity A. O-F and Cl-F B. B-F and Cl-F C. Al- Cl and I-Br D. I-Br and SI-Cl
A. O-F and Cl-F
Find the complete ionic equation, identity the spectator ions, and write the net equation CuCl2(aq) + 2NaOH(aq) ---> Cu(OH)2(s) + 2NaCl(aq)
Complete equation= Cu^2(aq) + 2Cl^-1(aq) + 2Na^1(aq) + 2OH^-1(aq) ---> CU(OH)2(s) + 2Na^1(aq) + 2Cl^-1(aq) Spectator ions= Cl^-1(aq) and Na^1(aq) Net equation= Cu^2(aq) + 2OH^-1(aq) ---> Cu(OH)2^-1
In a triple bond between two atoms, the number of shared pairs of electron is A. 1 B. 2 C. 3 D. 4
C. 3
Find electro negativity and name bond type Phosphorous and oxygen
1.4/ polar
Which one of the following molecular formulas is also an empirical formula A. C6H6O2 B. C2H6SO C. H2O2 D. H2P4O6
B. C2H6SO
Name P2O5
Diphosphorus pentoxide
Write chemical formula Digit roger monoxide
N2O
Write products with states and balance H2SO4(aq) + K2CO3(aq) --->
H2O(l) + CO2(g) + K2SO4(aq)
Name Hydrobromic acid
HBr
The name of an oxyacid has the suffic -ic acid. What is the suffix of the oxyanion A. Ic B. it's C. Ate D. Ous
C. Ate
How many single covalent bonds must a silicon atom form to have a complete octet in its glance she'll A. 3 B. 4 C. 1 D. 2
B. 4
Name Phosphoric acid
H3PO4
When one atom is significantly more electronegative than another one, a covalent bond between them is A. Non polar B. hydrate C. Polar D. Very unstable
C. Polar
Find electro negativity and name bond type Potassium and fluoride
3.2/ ionic
Name H2CO3
Carbonic acid
Name Nitric acid
HNO3
Write products with states and balance K2S(aq) + Ni(NO3)2(aq) --->
2KNO3(aq) + NiS(s)
Name MgSO4 - 7H2O
Magnesium Sulfate- heptahydrate
The type of compound that is mostly likely to contain a covalent bond is A. One that is composed of a metal from the far left of the periodic table and a nonmetal from the far right of the periodic table B. a solid metal C. One that is composed of only nonmetals D. Held togther by the electrostatic forces between oppositely charged ions
C. One that is composed of only nonmetals
Name HCl
Hydrochloric acid
Find the complete ionic equation, identity the spectator ions, and write the net equation Aqueous silver nitrate reacts with ammonium carbonate to produce a silver carbonate precipitate
Complete equation= 2AgNO3(aq) + (NH3)2CO3(aq) ---> Ag2CO3(s) + 2NH4NO3(aq) Ionic equation= 2Ag^1(aq) + 2NO3^-1(aq) + 2NH4^1(aq) + CO3^-2 ---> Ag2Co3(s) 2NH4^1(aq) + 2NO3^-1(aq) Spectator ions= NO3^-1(aq) and NH4^1(aq) Net equation= 2Ag^1(aq) + CO3^-2(aq) ---> Ag2CO3(s)
Find the complete ionic equation, identity the spectator ions, and write the net equation Aqueous sulfuric acid reacts with aqueous sodium hydroxide to produce aqueous sodium sulfate and water
Complete equation= H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l) Ionic equation= 2H^1(aq) + SO4^-2(aq) + 2Na^1(aq) + 2OH^-1(aq) ---> 2Na^1(aq) + SO4^-2(aq) + 2H2O(l) Spectator ions= SO4^-2(aq) and Na^1(aq) Net equation= H^1(aq) + OH^-1(aq) ---> H2O(l)
How many single covalent bonds can halogens form A. 1 B. 2 C. 3 D. 4
A. 1
In which of the molecules below is the carbon-carbon distance the shortest A. H2C= CH2 B. H-C( three lines) C-H C. H3C-CH3 D. H2C=C=CH2
B. H-C(three lines) C-H
Name Cu(NO3)2
Copper (II) Nitrate
A bond is classified as ionic if the difference in the electro negativity between the two atoms is A. 2.0 or more B. between 1.9 and 0.5 C. 0.4 or less D. Less than zero
A. 2.0 or more
What is the maximum number of double bonds that a hydrogen atom can form A. 0 B. 1 C. 2 D. 3
A. 0
A bond is classified as non polar covalent if the difference in the electro negativity between the two atoms is A. 2.0 or more B. between 0.5 and 1.9 C. 0.4 or less D. Less than zero
C. 0.4 or less
Name H2SO4
Suffic acid
Find electro negativity and name bond type Sulfur and iodine
0/ non polar
Name HI
Hydroiodic acid
Which central atom violates the octet rule A. NH3 B. SeF2 C. BF3 D. AsF3
C. BF3
Write products with states and balance 2HNO3(aq) + Ba(OH)2(aq) --->
Ba(NO3)2(aq) + 2H2O(l)
Write chemical formula Iodine pentaflouride
IF5
A reaction was predicted through calculations to produce 32.4 g of a compound. When the product was measures from the expirement, there were only 26.1 g made. What is the percent yield of this reaction A. 80.6% B. 6.3% C. 24.1% D. 58.5%
A. 80.6%
A bond is classified as polar covalent if the difference in the electro negativity is between the two atoms is A. 2.0 or more B. between 1.9 and 0.5 C. 0.4 or less D. Less than zero
B. between 1.9 and 1.5
Name SF6
Sulfur hexafluoride
The basis of a covalent bond is the A. Sharing of an electron pair B. electrical attraction between oppositely charged ions C. Absorption D. Absorption of water into their solid structures
A. Sharing of an electron pair
Find the complete ionic equation, identity the spectator ions, and write the net equation NiBr2(aq) + 2AgNO3(aq) ---> Ni(NO3)2(aq) + 2AgBr(s)
COmplete equation= Ni^2(aq) +2Br^-1(aq) + 2Ag^1(aq) + 2NO3^-1(aq) ---> Ni^2(aq) + 2NO3^-1(aq) + 2AgBr(s) Spectator ions= Ni^2(aq) and NO3^-1(aq) Ionice equation= Br^-1(aq) + Ag^1(aq) ---> AgBr(s)
A certain reaction has a 73.6% yield. If 53.8 grams of the product were predicted by stoichiometry to be made, what would the actual yield be A. 73.1 g B. 19.8 g C. 26.9 g D. 39.6 g
D. 39.6 g
Name Perchloric acid
HClO4
Write chemical formula Chlorine
Cl2
Write products with states and balance Pb(NO3)2(aq) + 2 Nacl(aq) --->
PbCl2(s) + 2NaNO3(aq)
Name As2S3
Diarsenic trisulfide
Which of the following is a reason why the actual yield differs from the expected yield A. Some portion of the reactants may not react B. some of the reactants may take part in side reactions C. Some of the product may be lost during the process of recovering it or transferring it D. All of the above
D. All of the above
Name H2O
Water
Section 4
(12 cards)