1 09 quiz problem solving in chemistry

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Chemistry archive

Course: chemistry archive   >   unit 3.

• Chemical reactions introduction
• Balancing chemical equations
• Balancing more complex chemical equations
• Visually understanding balancing chemical equations
• Balancing another combustion reaction
• Balancing chemical equation with substitution

Balancing chemical equations 1

• Your answer should be
• an integer, like 6 ‍  
• an exact decimal, like 0.75 ‍  
• a simplified proper fraction, like 3 / 5 ‍  
• a simplified improper fraction, like 7 / 4 ‍  
• a mixed number, like 1   3 / 4 ‍  

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Chemistry Problems With Answers

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Use chemistry problems as a tool for mastering chemistry concepts. Some of these examples show using formulas while others include lists of examples.

Acids, Bases, and pH Chemistry Problems

Learn about acids and bases. See how to calculate pH, pOH, K a , K b , pK a , and pK b .

• Practice calculating pH.
• Get example pH, pK a , pK b , K a , and K b calculations.
• Get examples of amphoterism.

Atomic Structure Problems

Learn about atomic mass, the Bohr model, and the part of the atom.

• Practice identifying atomic number, mass number, and atomic mass.
• Get examples showing ways to find atomic mass.
• Use Avogadro’s number and find the mass of a single atom .
• Review the Bohr model of the atom.
• Find the number of valence electrons of an element’s atom.

Chemical Bonds

Learn how to use electronegativity to determine whether atoms form ionic or covalent bonds. See chemistry problems drawing Lewis structures.

• Identify ionic and covalent bonds.
• Learn about ionic compounds and get examples.
• Practice identifying ionic compounds.
• Get examples of binary compounds.
• Learn about covalent compounds and their properties.
• See how to assign oxidation numbers.
• Practice drawing Lewis structures.
• Practice calculating bond energy.

Chemical Equations

Practice writing and balancing chemical equations.

• Learn the steps of balancing equations.
• Practice balancing chemical equations (practice quiz).
• Get examples finding theoretical yield.
• Practice calculating percent yield.
• Learn to recognize decomposition reactions.
• Practice recognizing synthesis reactions.
• Practice recognizing single replacement reactions.
• Recognize double replacement reactions.
• Find the mole ratio between chemical species in an equation.

Concentration and Solutions

Learn how to calculate concentration and explore chemistry problems that affect chemical concentration, including freezing point depression, boiling point elevation, and vapor pressure elevation.

• Get example concentration calculations in several units.
• Practice calculating normality (N).
• Practice calculating molality (m).
• Explore example molarity (M) calculations.
• Get examples of colligative properties of solutions.
• See the definition and examples of saturated solutions.
• See the definition and examples of unsaturated solutions.
• Get examples of miscible and immiscible liquids.

Error Calculations

Learn about the types of error and see worked chemistry example problems.

• See how to calculate percent.
• Practice absolute and relative error calculations.
• See how to calculate percent error.
• See how to find standard deviation.
• Calculate mean, median, and mode.
• Review the difference between accuracy and precision.

Equilibrium Chemistry Problems

Learn about Le Chatelier’s principle, reaction rates, and equilibrium.

• Solve activation energy chemistry problems.
• Review factors that affect reaction rate.
• Practice calculating the van’t Hoff factor.

Practice chemistry problems using the gas laws, including Raoult’s law, Graham’s law, Boyle’s law, Charles’ law, and Dalton’s law of partial pressures.

• Calculate vapor pressure.
• Solve Avogadro’s law problems.
• Practice Boyle’s law problems.
• See Charles’ law example problems.
• Solve combined gas law problems.
• Solve Gay-Lussac’s law problems.

Some chemistry problems ask you identify examples of states of matter and types of mixtures. While there are any chemical formulas to know, it’s still nice to have lists of examples.

• Practice density calculations.
• Identify intensive and extensive properties of matter.
• See examples of intrinsic and extrinsic properties of matter.
• Get the definition and examples of solids.
• Get the definition and examples of gases.
• See the definition and examples of liquids.
• Learn what melting point is and get a list of values for different substances.
• Get the azeotrope definition and see examples.
• See how to calculate specific volume of a gas.
• Get examples of physical properties of matter.
• Get examples of chemical properties of matter.
• Review the states of matter.

Molecular Structure Chemistry Problems

See chemistry problems writing chemical formulas. See examples of monatomic and diatomic elements.

• Practice empirical and molecular formula problems.
• Practice simplest formula problems.
• See how to calculate molecular mass.
• Get examples of the monatomic elements.
• See examples of binary compounds.
• Calculate the number of atoms and molecules in a drop of water.

Nomenclature

Practice chemistry problems naming ionic compounds, hydrocarbons, and covalent compounds.

• Practice naming covalent compounds.
• Learn hydrocarbon prefixes in organic chemistry.

Nuclear Chemistry

These chemistry problems involve isotopes, nuclear symbols, half-life, radioactive decay, fission, fusion.

• Review the types of radioactive decay.

Periodic Table

Learn how to use a periodic table and explore periodic table trends.

• Know the trends in the periodic table.
• Review how to use a periodic table.
• Explore the difference between atomic and ionic radius and see their trends on the periodic table.

Physical Chemistry

Explore thermochemistry and physical chemistry, including enthalpy, entropy, heat of fusion, and heat of vaporization.

• Practice heat of vaporization chemistry problems.
• Practice heat of fusion chemistry problems.
• Calculate heat required to turn ice into steam.
• Practice calculating specific heat.
• Get examples of potential energy.
• Get examples of kinetic energy.
• See example activation energy calculations.

Spectroscopy and Quantum Chemistry Problems

See chemistry problems involving the interaction between light and matter.

• Calculate wavelength from frequency or frequency from wavelength.

Stoichiometry Chemistry Problems

Practice chemistry problems balancing formulas for mass and charge. Learn about reactants and products.

• Get example mole ratio problems.
• Calculate percent yield.
• Learn how to assign oxidation numbers.
• Get the definition and examples of reactants in chemistry.
• Get the definition and examples of products in chemical reactions.

Unit Conversions

There are some many examples of unit conversions that they have their own separate page!

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Chemistry Assistant

Ai-powered chemistry problem solver.

• Homework Help: Students can use the Chemistry Assistant to help understand and work through chemistry problems in their homework.
• Teaching Aid: Teachers can use this tool to generate solutions to chemistry problems, aiding in lesson planning and student instruction.
• Exam Preparation: Use the Chemistry Assistant to prepare for chemistry exams by solving practice problems and getting explanations of chemistry terms and principles.
• Research Assistance: Researchers can use this tool to help work through chemistry problems in their work.

Yes, the Chemistry Assistant is designed to handle a wide range of chemistry problems, from basic to advanced. However, it's always important to cross-verify the solutions provided by the AI with trusted resources or professionals in the field to ensure accuracy and understanding, especially with more complex problems and principles.

While the Chemistry Assistant is specifically designed for chemistry problems, HyperWrite offers other AI tools for different subjects and needs. You can explore more tools at app.hyperwriteai.com/tools .

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Phase Changes

10.7k plays, 5th -  8th  , states of matter, metric conversions practice, 10th -  12th  , 9th -  12th  , heating curves, states of matter and phase changes.

Chemistry - Unit 1: MATTER

17 questions

Introducing new   Paper mode

No student devices needed.   Know more

When rain freezes and turns to ice or sleet, this is an example of a

physical property

chemical property

physical change

chemical change

Two substances are combined. Gas is released, and a tall, black column forms. This is an example of a

Which answer below is an example of two physical properties of matter?

weight and toxicity

mass and reactivity

mass and volume

mass and pH

When two substances are combined, a milky substance forms and falls to the bottom of the flask. What would be the most likely reason this happened?

One of the substances dissolved.

The substances chemically reacted with one another.

Some of the liquid evaporated.

One of the substances crystallized.

Conductivity is an example of a/an

intensive property

extensive property

dependent property

To compress means to be squeezed or pressed together. Why is a gas easily compressible, but solids are not?

Gas particles are much smaller.

Particles in a solid are not strongly attracted to one another.

Molecules in a solid are much larger.

Particles in a gas are much farther apart compared to a solid.

Which state of matter has an indefinite shape and a definite volume?

Which state of matter has an indefinite shape and an indefinite volume?

Which state of matter has a definite shape and a definite volume?

is made of a single substance.

is made of more than one substance.

always has a fixed composition.

is made of substances that you can always see at all times.

Students were studying different liquid samples. Which of these is most likely a pure substance?

Liquid A was heated and evaporated completely. Nothing was left behind in the beaker.

An acid was mixed with Liquid B, and bubbles formed.

Once Liquid C cooled, a precipitate formed.

The density of Liquid D is 2.3 g/mL.

If a salad dressing with water and vinegar looks the SAME throughout (has a consistent color and texture), it would be an example of a

heterogeneous mixture

pure substance

homogeneous mixture

What happens when you mix water and NaCl?

NaCl is salt. It will dissolve in water.

NaCl is salt, and it will all just sink to the bottom of the container.

NaCl is salt, and it will all float on top of the water.

We have no way of knowing what NaCl is.

When salt dissolves in water, it is an example of a

chemical reaction

TRUE or FALSE: A salt water solution will look the same throughout.

Mixtures are

physically combined and can usually be separated.

physically combined and can never be separated.

chemically combined.

We have no way of knowing how they combine.

A salt water solution can be separated by

a centrifuge

evaporation

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pH & pOH Calculations Quiz

This online quiz is intended to give you extra practice in calculating pH and pOH from hydrogen ion (H+) and hydroxide ion (OH-) concentrations and vice versa.

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Your chance of acceptance, your chancing factors, extracurriculars, what exactly is on the act test.

Hey there! I'm considering taking the ACT besides the SATs, but I'm slightly confused about what's actually covered on the ACT. Could someone break down the subjects for me and possibly let me know what unique sections there may be? Appreciate the help in advance.

Sure, happy to help! The ACT covers four primary areas: English, Math, Reading, and Science Reasoning.

1. English : This section contains 75 questions to be completed within 45 minutes. It measures standard written English and rhetorical skills. Questions on this section will focus on punctuation, usage and grammar, sentence structure, then rhetorical skills like strategy, organization, and style.

2. Math : For the Math section, you will have 60 minutes to answer 60 questions. The questions roughly break down into pre-algebra/algebra (57-60%), geometry/trigonometry (40-43%). This section assesses your ability to solve basic computations and reason quantitatively.

3. Reading : The Reading section consists of 40 questions in 35 minutes and assesses your reading comprehension skills. The section includes four, 10-question passages in the areas of prose fiction, social science, humanities, and natural science.

4. Science Reasoning : Consisting of 40 questions to be completed in 35 minutes, this section tests interpretation, analysis, evaluation, reasoning, and problem-solving skills in natural sciences contexts (biology, earth/space sciences, chemistry, and physics).

Additionally, there is an optional Writing section (typically known as the ACT Plus Writing), which includes one essay that you have 40 minutes to write. This portion tests your skills in creating and organizing an argument.

Remember that unlike the SAT, the ACT doesn't have any no-calculator section. You can use a calculator on all of the math problems. But it might not be as helpful in the Science Reasoning section, which is more about interpreting graphs and data than making calculations.

I hope that clears up your confusion, and best of luck with your prep!

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