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Concepts: acid-base neutralization, predicting the salt formed in a neutralization reaction. What salt is produced when nitric acid is neutralized with potassium…
Acids and Bases #1
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Concepts: acid-base neutralization, predicting the acid and base that produce a particular salt in a neutralization reaction. What acid-base combination produces lithium…
Acids and Bases #2
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Concepts: atomic structure, subatomic particles, nucleus, protons, neutrons, atomic number, mass number, isotopes. How many protons and neutrons are in the nucleus of…
Atomic Structure #1
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Concepts: density, metric conversion.What is the mass (in kg) if the density is 1.8 g/mL and the volume is 1500L?
Density Problem #1
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Concepts: gases, partial pressure. What is the partial pressure of He if a sealed flask contains 2.0 mole of He gas and 4.0 moles of Ar gas at a total pressure of 12.0…
Gas Problem #1
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Concepts: ideal gas law, ideal gas constant (R), Kelvin temperature conversion. What is the pressure if 2.0 mol of helium gas at 22°C occupy a volume of 3.3 L?
Gas Problem #2
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Concepts: Charles' Law, gas laws, volume-temperature relationship for gases. A balloon occupies 9.0 L at 250 K. What is its volume at 750 K? (P is constant.)
Gas Problem #3
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Concepts: formulas of ionic compounds, monatomic ions, isoelectronic, group number, periodic table. Write the formulas for the following ionic compounds: potassium…
Ionic Compounds #1
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Concepts: metric prefixes, metric conversions. What is the mass in nanograms of a sample of NaCl that weighs 35.2 grams?
Metric Conversions #1
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Concepts: metric prefixes, metric conversions. What volume in microliters is equivalent to 1.5 milliliters?
Metric Conversions #2
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Concepts: nuclear decay, positron emission, isotopes. What isotope is obtained when P-30 decays by positron emission?
Nuclear Decay #1
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Concepts: Lewis structure, shapes of molecules, bond angle, VSEPR. What is the H-S-H bond angle in hydrogen sulfide, and what is the shape of this molecule?
Shapes of Molecules #1
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Concepts: solutions, concentration units, weight/volume percent. How many grams of KCl are in 300 mL of a solution of KCl that is 3.5%w/v?
Solutions Problem #1
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Concepts: solutions, concentration units, molarity. What is the molarity if 15 g of NaOH are dissolved in enough water so that the solution's volume is 250 mL?
Solutions Problem #2
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Concepts: formula weight, formula of a compound.What is the formula weight of strontium bromide?
Stoichiometry Problem #1
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Concepts: balancing a chemical equation, using a balanced equation. How many moles of . . . can be produced from 2.4 moles of nitrogen dioxide?
Stoichiometry Problem #2
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Concepts: formula weight, gram-mole conversion. What is the mass of 0.32 moles of carbon dioxide gas?
Stoichiometry Problem #3
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