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When elements combine to form compounds, |
their properties change completely |
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The first chemist to formally state the law of constant composition was ________. |
Proust |
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The law of constant composition states: |
All samples of a given compound have the same proportions of their constituent elements. |
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The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law? |
Law of Constant Composition |
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What is the oxygen-to-hydrogen mass ratio for H2O2? |
16 |
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The phosphorous-to-hydrogen mass ratio is 10.2 for a compound. This ratio could correspond to the compound |
PH3 |
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What is the oxygen-to-sulfur mass ratio of sulfur dioxide? |
1.0 |
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Which of the following statements about chemical formulas is FALSE? |
The subscripts represent the relative mass of each type of atom in the compound. |
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How many total atoms are in the formula Al2(CO3)3? |
14 |
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How many carbon atoms are in the formula Al2(CO3)3? |
3 |
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How many oxygen atoms are in the formula Al2(CO3)3? |
9 |
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Which formula shows the proper use of parentheses? |
Ca(NO3)2 |
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How many of each type of atoms are there in the formula NH4C2H3O2? |
N = 1, H = 7, C = 2, O = 2 |
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How many of each type of atom are there in the formula Ca3(PO4)2? |
Ca = 3, P = 2, O = 8 |
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How many of each type of atom are there in the formula (NH4)2HPO4? |
N = 2, H = 9, P = 1, O = 4 |
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What is the correct formula for a compound that has three oxygen atoms and one sulfur atom? |
SO3 |
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What is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms? |
P4O10 |
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Carbon is considered which of the following? |
atomic element |
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Which among the following elements does NOT exist as a diatomic molecule in nature? |
neon |
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Carbon monoxide is considered which of the following? |
molecular compound |
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Fluorine is considered which of the following? |
molecular element |
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Ammonium fluoride is considered which of the following? |
ionic compound |
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Which of the following species is a molecular element? |
chlorine |
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Which of the following is a molecular compound? |
nitrogen monoxide |
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What is the formula for an ionic compound made of barium and nitrogen? |
Ba3N2 |
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What is the formula for an ionic compound made of magnesium and sulfur? |
MgS |
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What is the formula for an ionic compound made of carbon and oxygen? |
Carbon and oxygen do not form an ionic compound |
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The ionic compound that forms between potassium and oxygen is |
K2O |
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What is the formula for an ionic compound made of aluminum and oxygen? |
Al2O3 |
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What is the name of the ionic compound made of beryllium and chlorine? |
beryllium chloride |
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What is the name of the compound made from lithium and oxygen? |
lithium oxide |
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Which metal atom below would NOT be involved in formation of a Type II compound? |
Ba |
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What is the name of CoS? |
cobalt(II) sulfide |
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What is the name of Ca(NO3)2? |
calcium nitrate |
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Which formula shown is incorrect for the name given? |
magnesium nitrite: Mg(NO2)3 |
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Which formula shown is incorrect for the name given? |
lithium sulfate: LiSO4 |
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What is the name of the compound whose formula is Na2O? |
sodium oxide |
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What is the formula for the acetate polyatomic ion? |
C2H3O2- |
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What is the correct formula for potassium dichromate? |
K2Cr2O7 |
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What is the correct formula for ammonium hydrogen sulfate? |
NH4HSO4 |
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The formula for potassium chlorate is KClO3. The formula for magnesium chloride is MgCl2. What is the formula for magnesium chlorate? |
Mg(ClO3)2 |
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The charge of a vanadium ion in the compound V2O5 is: |
5+ |
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What is the correct formula for the hypochlorite polyatomic ion? |
ClO- |
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What is the correct name for the BrO4 1- ion? |
perbromate |
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Choose the pair of names and formulas that do NOT match. |
all of these are correct |
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The name trisodium phosphate is incorrect for the compound Na3PO4 because |
you cannot use a prefix for the first element of an ionic compound |
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What is the name of the molecular compound SF5? |
sulfur pentafluoride |
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What is the name of the molecular compound SO3? |
sulfur tetraoxide |
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What is correct name of the compound whose formula is N2O4? |
dinitrogen tetroxide |
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What is correct name of the compound whose formula is BF3? |
boron trifluoride |
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What would the formula of diiodine pentasulfide be? |
I2S5 |
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What is the correct formula for the molecular compound heptaphosphorus octafluoride? |
P7F8 |
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What is the proper name for HBr (aq)? |
hydrobromic acid |
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What is the name of HI (aq)? |
hydroiodic acid |
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What is the name of HIO3? |
iodic acid |
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What is the name of HNO2? |
Nitrous acid |
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A certain oxyacid is derived from the oxyanion SO32-. The formula for the oxyacid is |
H2SO3. |
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What is the formula mass of sulfurous acid? |
82.08 amu |
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What is the formula mass for potassium nitrate? |
101.10 amu |
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What is the formula mass for diboron tetrachloride? |
163.43 amu |
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What is the formula mass of copper(II) fluoride? |
101.55 |
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Which of the following has the largest formula mass? |
SO2 |
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Which of the following compounds have the smallest formula mass? |
H2O |
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A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio. The name of the compound described here is |
sodium oxide |
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