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What is the substance present in the smallest amount in a solution?
Solute
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Which process defines how molecular compounds form ions upon dissolution?
Ionization
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Which of these compounds is a strong electrolyte?
KOH
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Based on the solubility rules, which one of these compounds should be insoluble in water?
AgBr
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Based on the solubility rules, which one of these compounds should be soluble in water?
Na2S
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Based on the solubility rules, which of these processes will occur if solutions of CuSO4 (aq) and BaCl2 (aq) are mixed?
BaSO4 will percipitate; Cu2+ and Cl- are spectator ions
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Select the correct set of products for the following reaction
Ba(OH)2 (aq) + HNO3 (aq)----->
Ba(NO3)2 (aq) + H20(l)
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What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?
Ca(NO3)2
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Complete the following reaction and identify the Bronsted acid:
NaOH(aq) + HCl(aq) ----->
H2O(l) + NaCl (aq); HCl is the acid
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which of the following is oxidized in the following reaction?
Fe + Ag2O---->FeO + 2Ag
Fe
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The oxidation number of Cr in Cr2 O7 2- is
+6
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Which one of these equations describes a redox reaction?
2Al(s) + 3H2SO4(aq) ----> Al2(SO4)3 (ag) + 3H2 (g)
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Identify the reducing agent in the chemical reaction
Cd + NiO2 + 2H2O ----> Cd (OH)2 + Ni(OH)2
Cd
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A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?
8.72 x 10^-2
50mL x .436m/250mL
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A standard solution of 0.243M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?
1.13 M
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A 34.62mL of 0.1510M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What is the concentration of the original sulfuric acid solution?
0.0523 M
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Which of the following is/are characteristic of gases?
High compressibility, relatively large distances between molecules, and formation of homogenous mixtures regardless of the nature of gases
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If the atmospheric pressure in Denver is 0.88 atm then what is this in mmHg (1 atm=101,325 pa= 760 torr, 1 torr=1mmHg)?
668.8 mmHg
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The pressure of an ideal gas is inversely proportional to its volume at constant temperature and number of moles is a statement of ____law.
Boyle's
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A sample of a gas has an initial pressure of 0.987 atm and a volume of 12.8L. What is the final pressure if the volume is increased to 25.6L?
0.494 atm
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A sample of carbon dioxide gas at 125C and 248 torr occupies a volume of 275L. What will the gas pressure be if the volume is increased to 321L at 125C?
212 torr
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What are the conditions of STP?
273.15K and 760 Torr
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Calculate the volume occupied by 35.2g of methane gas (CH4) at 25C and 1.0 atm. R=0.0821Lxatm/Kxmol
53.7L
PV=nRT/P
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A sample of propane, a component of LP gas, has a volume of 35.3L at 315K and 922torr. What is it's volume at STP
37.1L
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Calculate the density of CO2(g) at 100C and 10.0 atm pressure (R=0.08206L atm/mol K
D=PM/RT
14.4 g/L
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A gaseous compound is 30.4% nitrogen and 69.6% oxygen by mass. A 5.25g sample of the gas occupies a volume of 1.00L and exerts a pressure of 1.26atm at -4.0c. Which of the following is it's molecular formula (R=0.08206 L atm/mol K)
N2O4
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What volume of CO2 gas at 645 torr and 800K could be produced by the reaction of 45g of CaCO3 accorning to the equation CaCO3 (s)----> CaO(s) + CO2 (g)
34.8 L
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