CHEM 6-10
What is the chemical formula for ammonium dichromate? NH4(Cr2O7)2 (NH4)2Cr2O7 2NH4Cr2O7 (NH4)2CrO4
(NH4)2Cr2O7
In an equation, what is the symbol for a liquid substance? (aq) (l) (g) (s)
(l)
Convert 3.214 x 10-21 into standard notation. 32,140,000,000,000,000,000,000 0.000 000 000 000 000 000 032 14 3,214,000,000,000,000,000,000 0.000 000 000 000 000 000 003 214
0.000 000 000 000 000 000 003 214
When the following equation is balanced using the smallest possible integers, which coefficient would go in front of H2? Sn + NaOH → Na2SnO2 + H2 4 2 1 3
1
Subtract 45.8765 from 1200.96 to the correct number of significant figures. Which is the correct answer? 1155.0835 1155.08 1155.1 1155
1155.08
In the Lewis dot structure for CO2, how many total valence electrons are there in the entire molecule, including the ones used to form bonds? 16 14 18 12
16
Determine the bond length for a bond between beryllium and fluorine. Beryllium—atomic radius: 112 pm; covalent radius: 90 pm; ionic radius: 59 pm. Fluorine—atomic radius: 69 pm; covalent radius: 72 pm; ionic radius: 119 pm. 209 pm 162 pm 178 pm 181 pm
178 pm
Determine the bond length for a bond between bromine and oxygen. Bromine—atomic radius: 119 pm; covalent radius: 114 pm; ionic radius: 182 pm. Oxygen—atomic radius: 60 pm; covalent radius: 73 pm; ionic radius: 126 pm. 308 pm 314 pm 301 pm 187 pm
187 bpm
In the Lewis dot structure for CO2, how many bonds are there between each carbon and oxygen? 3 1 2
2
In the Lewis dot structure for NH3, how many dots are on the nitrogen? 6 4 2 0
2
In the Lewis dot structure for PO(3)^(3-), how many dots are on the phosphorus? 2 0 4 6
2
When the following equation is balanced using the smallest possible integers, which coefficient would go in front of KNO3? Pb(NO3)2 + K2CO3 → PbCO3 + KNO3 4 2 3 5
2
When the following equation is balanced using the smallest possible integers, which coefficient would go in front of NaI? Na2S2O3 + I2 → NaI + Na2S4O6 3 1 4 2
2
Determine the bond length for a bond between chlorine and lithium. Chlorine—atomic radius: 91 pm; covalent radius: 99 pm; ionic radius: 167 pm. Lithium—atomic radius: 156 pm; covalent radius: 123 pm; ionic radius: 90 pm. 257 pm 189 pm 222 pm 247 pm
257 pm
Determine the bond length for a bond between chlorine and sodium. Chlorine—atomic radius: 91 pm; covalent radius: 99 pm; ionic radius: 167 pm. Sodium—atomic radius: 186 pm; covalent radius: 154 pm; ionic radius: 116 pm. 283 pm 253 pm 277 pm 209 pm
283 pm
In the Lewis dot structure for HCCH, how many bonds are between the carbon atoms? 4 3 1 2
3
In the Lewis dot structure for HCN, how many bonds are between carbon and nitrogen? 4 1 3 2
3
When nitrogen gas reacts with hydrogen gas to form ammonia, what is the coefficient on hydrogen in the balanced equation? 4 3 none 2
3
Calculate the percent covalent character of a chemical bond between chlorine and sodium. 36 percent 30 percent 34 percent 70 percent
30%
Calculate the bond length (in picometers) of a chemical bond between bromine and strontium. Bromine—atomic radius: 119 pm; covalent radius: 114 pm; ionic radius: 182 pm. Strontium—atomic radius: 215 pm; covalent radius: 191 pm; ionic radius: 132 pm. 256 pm 314 pm 3.05 pm 305 pm
314 pm
Calculate the percent ionic, the percent covalent, and the bond length (in picometers) of a chemical bond between phosphorus and oxygen. Phosphorus—atomic radius: 109 pm; covalent radius: 106 pm; ionic radius: 212 pm. Oxygen—atomic radius: 60 pm; covalent radius: 73 pm; ionic radius: 126 pm. 66 percent ionic, 34 percent covalent, 179 pm 66 percent ionic, 34 percent covalent, 338 pm 34 percent ionic, 66 percent covalent, 179 pm 34 percent ionic, 66 percent covalent, 338 pm
34 percent ionic, 66 percent covalent, 179 pm
When the following equation is balanced using the smallest possible integers, which coefficient would go in front of NO2? Cu(NO3)2 → CuO + NO2 + O2 2 4 1 3
4
If your heart beats an average of 120 times per minute during a distance race, how many times would your heart beat during a race of 6 hours? 3.00 x 100 heartbeats 4.32 x 104 heartbeats 1.20 x 101 heartbeats 4.32 x 103 heartbeats
4.32 x 104 heartbeats
David's mom was always after him to get his hair cut and "off his face." For her birthday, he decided to grant her wish. He goes to a fancy European hair salon where the hairdressers use the metric system. What would be a reasonable amount for David to have trimmed off his hair? 4 cm 4 km 4 m 4 hm
4cm
Bryan is doing a chemistry lab and needs to measure exactly 5.5000 mL of water. How many significant digits are in this measurement? 1 2 5 3
5
Convert 5.69004 x 106 into standard notation. 569,004 56,900,400 0.569 004 5,690,040
5,690,040
What is the product of 6.02 x 1023 when multiplied by 9.1 x 10-31? 5.5 x 1054 5.5 x 10-8 5.5 x 10-7 5.5 x 10-53
5.5 x 10-7
3. Scott decided to plant a garden. He was digging a row to plant corn seeds and the package of corn seeds instructed him to bury the seeds 5-6 cm in the ground. The package also said that corn rows should be 0.5 meters apart from each other. Scott's ruler only measures in millimeters (mm). How deep should he dig the corn, and how far apart should he place the rows? 0.5-0.6 mm deep, 500 mm apart 50-60 mm deep, 500 mm apart 50-60 mm deep, 0.0005 mm apart 0.5-0.6 mm deep, 0.0005 mm apart
50-60 mm deep, 500 mm apart
Calculate the percent ionic character of a chemical bond between magnesium and nitrogen. 49 percent 47 percent 55 percent 51 percent
51%
Multiply the following numbers: 98.7 x 467.8 x 12.00. Which of the following answers has the correct amount of significant figures? 554,062 554,062.3222 554,000 554,062.32
554,000
Sally is measuring the weight of a sodium chloride crystal. The scale indicates the crystal weighs 10.0010 g. How many significant figures are in this measurement? 2 5 3 6
6
The Lewis dot symbol for Cl has how many dots? 4 5 7 6
7
Calculate the percent ionic character of a chemical bond between calcium and oxygen. 24 percent 22 percent 76 percent 79 percent
76%
When Fe3O4 + Al → Al2O3 + Fe is balanced, which coefficient would go in front of (Fe)? 6 3 4 9
9
8. Calculate the percent ionic, the percent covalent, and the bond length (in picometers) of a chemical bond between sodium and fluorine. For sodium—atomic radius: 186 pm; covalent radius: 154 pm; ionic radius: 116 pm. For fluorine—atomic radius: 69 pm; covalent radius: 72 pm; ionic radius: 119 pm. 89 percent ionic, 11 percent covalent, 235 pm 9 percent ionic, 91 percent covalent, 226 pm 91 percent ionic, 9 percent covalent, 235 pm 91 percent ionic, 9 percent covalent, 2.26 pm
91 percent ionic, 9 percent covalent, 235 pm
What is the chemical formula for silver iodate? SiIO3 Ag(IO2)3 AgIO3 Ag(IO3)3
AgIO3
What is the chemical formula for aluminum chlorate? Al(ClO3)3 Al(ClO4)3 AlClO3 Al3ClO3
Al(ClO3)3
What is the chemical formula for tetraboron decahydride? Bo4H10 B6H10 B4H10 BH3
B4H10
What is the chemical formula for barium nitride? Ba3N2 BaN Ba(NO3)2 B3N2
Ba3N2
What is the formula for carbon dioxide? C2O CO2 C2O2 CO
CO2
Calcium bicarbonate and calcium hydroxide form calcium carbonate and water. In this equation, what is the formula for calcium hydroxide? Ca(OH)2 CaOH2 CaOH CaH2
Ca(OH)2
What is the formula for calcium bromide? Ca2Br CaBr2 CaBr Ca2Br2
CaBr2
What is the chemical formula for calcium peroxide? CaO CO2 CaO2 Ca2O2
CaO2
What is the chemical symbol for dichlorine heptaoxide? Cl2(O2)7 ClO Cl2O7 Cl2O6
Cl2O7
Choose the balanced equation for the following reaction. Cu(NO3)2 + NaOH → Cu(OH)2 + NaNO3 Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3 Cu(NO3)2 + NaOH → Cu(OH)2 + NaNO3 2Cu(NO3)2 + 4NaOH → 2Cu(OH)2 + 4NaNO3 2Cu(NO3)2 + NaOH → Cu(OH)2 + 2NaNO3
Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3
In the chemical equation that produces hydrogen gas, what is the symbol for hydrogen gas? OH H H2 2H
H2
Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. In this reaction, what is the formula for sulfuric acid? H2SO4 HSO4 H2SO3 H3SO3
H2SO4
What is the chemical formula for mercury (II) nitrate? Hg(NO3)2 HgNO3 Me(NO3)2 Hg(NO2)2
Hg(NO3)2
What is the chemical formula for potassium sulfide? K2S KS PS P2S
K2S
What is the formula for magnesium oxide? MgO MgO2 Mg2O Mg2O2
MgO
What is the formula for dinitrogen pentoxide? N2O5 NO5 N2O N5O2
N2O5
What is the formula for ammonium nitrate? NH4(NO3)2 NH4NO3 NH3NO3 NO3NH4
NH4NO3
What is the chemical formula for sodium chloride? Na2Cl2 SoCl NaCl NaCl2
NaCl
In the equation sodium oxide plus water equals sodium hydroxide, which of the following formulas is sodium hydroxide? Na2O NaOH Na2OH NaO2
NaOH
What is the balanced equation for the combustion of sulfur? S (s) + 2O2 (g) → SO42- (aq) 2S (s) + 3O2 (g) → SO3 (s) S (s) + O2 (g) → SO (g) S (s) + O2 (g) → SO2 (g)
S (s) + O2 (g) → SO2 (g)
Which of the following is not a clue that a chemical reaction has taken place? A solid forms. The reactant is smaller. Bubbles form. A flame appears. A color change occurs.
The reactant is smaller.
What is the complete balanced equation for the reaction between zinc hydroxide and acetic acid? Zn(OH)2 + CH3COOH → Zn + 2CO2 + 3H2O ZnOH + CH3COOH → ZnCH3COO + H2O Zn(OH)2 + 2CH3COOH → Zn(CH3COO)2 + 2H2O Zn(OH)2 + 2CH3COOH → Zn(CH3COO)2+ H2 + O2
Zn(OH)2 + 2CH3COOH → Zn(CH3COO)2 + 2H2O
An ionic bond will most likely form between which types of atoms? two nonmetal atoms two metal atoms a metal atom and a nonmetal atom
a metal atom and a nonmetal atom
When a solid produced by a chemical reaction separates from the solution, what is it called? a reactant a precipitate the mass of the product a molecule
a precipitate
What is the last step in balancing an equation? making the number of reactants equal the number of products adjusting coefficients to the smallest whole-number ratio adjusting subscripts to the formula(s) changing the products formed
adjusting coefficients to the smallest whole-number ratio
What is the chemical name for Al(NO3)3? aluminum nitrate aluminum nitrate (III) aluminum nitrite (III) aluminum nitrite
aluminum nitrate
What is the chemical name for Al2O3? aluminum oxygen aluminum oxide aluminium (III) oxide aluminum (III) oxide
aluminum oxide
According to the law of conservation of mass, the total mass of the reacting substances is what? always equal to the total mass of the products always less than the total mass of the products sometimes more and sometimes less than the total mass of the products always more than the total mass of the products
always equal to the total mass of the products
What is the chemical name for NH4CH3COO? ammonia acetate ammonium acetic ammonia acetic ammonium acetate
ammonium acetate
What is the correct chemical name for (NH4)2S? ammonium sulfur ammonium sulfide nitrogen hydrogen sulfide nitrogen hydrogen sulfur
ammonium sulfide
What is the chemical name for BrI3? bromine iodide bromine triiodide bromine iodine bromine triiodine
bromine triiodide
What is the correct chemical name for Ca3(PO4)2? tricalcium diphosphate calcium diphosphate calcium phosphate calcium (III) phosphate
calcium phosphate
Which observation does not indicate that a chemical reaction has occurred? change in total mass of substances formation of a precipitate production of a gas evolution of energy
change in total mass of substances
What is the chemical name for CoCO3? carbon oxide carbon trioxide cobalt (I) carbonate cobalt (II) carbonate cobalt (II) carbon trioxide
cobalt (II) carbonate
To balance a chemical equation, it may be necessary to adjust which of the following? subscripts formulas of the products number of products coefficients
coefficients
Which type of reaction is occurring in the following equation? 2SO2 (g) + O2 (g) → 2SO3 (g) decomposition combustion single replacement double replacement
combustion
18. What is the chemical name for Cu2S? copper (I) sulfide copper (II) sulfide copper (II) sulfite copper (I) sulfite
copper (I) sulfide
Identify the type of bond that would occur between carbon and oxygen. covalent ionic
covalent
Identify the type of bond that would occur between nitrogen and oxygen. ionic covalent
covalent
Two fluorine atoms become more stable by sharing their electrons. What type of chemical bonding is this? ionic covalent
covalent
dentify the type of bond that would occur between sulfur and oxygen. covalent ionic
covalent
Which type of reaction is occurring in the following equation? 2KClO3 → 2KCl + 3O2 synthesis decomposition single replacement combustion
decomposition
The equation AX + BY → AY + BX is the general equation for what type of reaction? single displacement synthesis double displacement decomposition
double displacement
Which type of reaction is occurring in the equation below? Cr2 (SO4)3 + 6NaOH → 2Cr(OH)3 + 3Na2SO4 decomposition combustion double replacement synthesis single replacement
double replacement
Identify the type of bond that would occur between barium and fluorine. covalent ionic
ionic
Identify the type of bond that would occur between copper and chlorine. ionic covalent
ionic
Identify the type of bond that would occur between potassium and iodine. covalent ionic
ionic
Sodium has one electron more than it needs to be stable. Chlorine, on the other hand, needs one electron to be stable. Sodium transfers one electron to chlorine. What type of chemical bonding is this? ionic covalent
ionic
What is the chemical name for FeCl3? iron (III) chloride iron (III) chlorine iron chloride (III) iron chloride
iron (III) chloride
What is the chemical name for Fe2O3? iron (II) oxide iron oxygen iron (III) oxide iron oxide
iron (III) oxide
Which prefix is equivalent to one thousand (1 x 103)? milli- deci- centi- kilo-
kilo-
What is the chemical name for Pb(Cr2O7)2? lead (II) dichromate lead (IV) dichromate lead chromate lead dichromate
lead (IV) dichromate
What is the chemical name for MgCl2? magnesium chlorine magnesium chloride magnesium(II) chloride magnesium dichloride
magnesium(II) chloride
Which of the following is not an example of a unit? ounce mass gram kilometer
mass
What does the symbol mm represent? milliliter. millimeter. meter. micrometer.
millimeter
What is the chemical name for NCl3? nitrogen trichloride nitrogen (III) chloride nitrogen chloride(III) nitrogen chloride
nitrogen trichloride
What is the substance that is formed during a chemical reaction called? precipitate reactant product coefficient
product
What type of reaction is represented by the following equation? Cl2 (g) + 2KBr (aq) → 2KCl (aq) + Br2 (l) single displacement synthesis decomposition combustion
single displacement
What type of reaction is occurring in the following equation? Cu + 2AgNO3 → Cu(NO3)2 + 2Ag single replacement double replacement decomposition combustion synthesis
single replacement
What is the correct chemical name for NaNO3 ? sodium nitrate sodium nitrogen oxide sodium sulfate sodium nitrogen oxygen
sodium nitrate
What is the name of Na3PO3? sodium phosphite sodium phosphate trisodium phosphate sodium phosphide
sodium phosphite
In which type of reaction do two or more substances combine to form a single new compound? decomposition reaction double-displacement reaction ionic reaction synthesis reaction
synthesis reaction
What type of reaction is represented by the following equation? 2Mg (s) + O2 (g) → 2MgO (s) single displacement synthesis reaction decomposition reaction double displacement
synthesis reaction
How does one indicate the state of matter for a reactant or a product in a chemical equation? the subscript after the formula the superscript after the formula the coefficient before the formula the symbol after the formula
the symbol after the formula
A covalent bond will most likely form between which types of atoms? two metal atoms two nonmetal atoms a metal atom and a nonmetal atom
two nonmetal atoms
