ALEKS chemistry answers, topic by topic
Canvas Quiz Solver shows ALEKS chemistry answers on the page, under each typed problem: density, unit conversions, equilibrium, precipitation, thermochemistry and stoichiometry. Structure drawing and some other drawing tools are not supported yet. Below the setup, each top topic has a worked method with made-up numbers.
Canvas Quiz Solver shows ALEKS chemistry answers under each typed problem in Learning mode, Knowledge Checks and assignments (beta). It reads expressions, units, exponents, fractions and tables. You type the answer into the ALEKS answer editor. Structure drawing is not supported yet, and it stays off on LockDown Browser and placement tests.
Works
- Typed answers with numbers and units
- Exponents, scientific notation and fractions
- Problems that include a data table
- Graph problems: it lists the points or the shape to draw
- Learning mode, Knowledge Checks and assignments
You type the answer into the ALEKS answer editor yourself.
Not supported yet
- Structure drawing (Lewis structures and molecules)
- Some other drawing tools
Off on purpose: pages that need LockDown Browser or Respondus Monitor, and ALEKS placement tests. It gets around nothing.
How it works on ALEKS
Three steps, and you stay the one who answers.
- Add Canvas Quiz Solver to Chrome. It is free to add, and you get free answers to try it on a real problem.
- Open your ALEKS chemistry topic. A Learning mode problem, a Knowledge Check or an assignment.
- Read the answer card under the problem. Type the answer into the ALEKS answer editor, then press Check or Submit yourself.
The honest limits: the extension does not type into ALEKS. Structure drawing is not supported yet. It is off on LockDown Browser and Respondus pages and on placement tests. Answers come from AI and can be wrong.
What ALEKS chemistry asks, and what the extension reads
Most ALEKS chemistry problems are a short statement, maybe a table, and one or more boxes where you type a number with its unit.
Those typed problems are the core of a general chemistry course in ALEKS, and they are what Canvas Quiz Solver reads. It reads the math in the statement (exponents, fractions, units and scientific notation) and the rows of a data table, and shows the answer under the problem. You type it into the ALEKS answer editor.
Some chemistry topics use drawing tools instead of a typed box, for example drawing a Lewis structure or a molecule. The extension does not support structure drawing yet. On a graph problem it lists the points or the shape to draw, and you draw it.
Every method below uses made-up numbers. They are not ALEKS problems, and your numbers will be different, so follow the steps, not the values.
Solving applied density problems in ALEKS
Every applied density problem is one formula, d = m / V, solved for whichever of the three is missing.
Write the formula first, then decide what the problem wants: the density, the mass or the volume. Rearrange before you plug in numbers: m = d × V and V = m / d. If the shape is a box, find the volume from length × width × height before anything else.
Units carry the problem. A density in g/cm3 needs the volume in cm3, and 1 mL is the same as 1 cm3. A volume in liters must become milliliters (× 1000) before you divide.
A metal block measures 4.20 cm by 2.50 cm by 1.80 cm and has a mass of 147.4 g. What is its density?
Three significant figures, because each length has three.
A procedure needs 35.0 g of a liquid with a density of 1.26 g/mL. What volume should you measure?
The grams cancel and mL is left, which tells you the setup is right.
Common input mistake: typing 7.7989 instead of 7.80. Round to the significant figures the data allows.
One-step unit conversion
Multiply by one conversion factor, written so the unit you start with cancels.
Write the given value with its unit, then a fraction with the new unit on top and the old unit on the bottom. The metric prefixes do the work: k = 103, c = 10−2, m = 10−3, µ = 10−6, n = 10−9.
Going to a smaller unit makes the number bigger, and going to a bigger unit makes it smaller. Use that as a quick check before you type.
Convert 0.0425 L to mL.
Same three significant figures as the given value.
Convert 862 nm to m. Write the answer in scientific notation.
In the ALEKS answer editor, the × 10 part goes in with its exponent, not as a long decimal.
Common input mistake: putting the factor upside down (dividing by 1000 instead of multiplying). If the unit does not cancel, flip it.
Writing the Kp (equilibrium constant) expression
Products over reactants, each partial pressure raised to its coefficient, and solids and liquids left out.
Kp uses partial pressures of gases, so only species marked (g) go in. A species marked (s) or (l) is left out of the expression. The coefficients in the balanced equation become exponents.
Kc follows the same rule with concentrations in square brackets. Read which one the problem asks for: a Kc expression is not a Kp expression.
Write Kp for 2SO2(g) + O2(g) ⇄ 2SO3(g). Then find Kp when P(SO3) = 0.80 atm, P(SO2) = 0.20 atm and P(O2) = 0.50 atm.
Each exponent is the coefficient from the balanced equation.
Write Kp for C(s) + CO2(g) ⇄ 2CO(g).
Leave solids and pure liquids out, even when they have a coefficient.
Common input mistake: adding the coefficients as multipliers (2 × P) instead of exponents (P2).
Predicting precipitation
Swap the partners of the two ionic compounds, then check each new compound against the solubility rules.
The short rules: compounds of Na+, K+, NH4+ and nitrates are soluble. Most chlorides, bromides and iodides are soluble, except with Ag+, Pb2+ and Hg22+. Most sulfates are soluble, except with Ba2+, Pb2+, Sr2+ and Ca2+. Most carbonates, phosphates and hydroxides are insoluble, except with the alkali metals and ammonium.
If one new compound is insoluble, it is the precipitate. If both are soluble, there is no reaction to write. Balance the charges in the new formula before you balance the equation.
Predict the precipitate, if any: (a) Pb(NO3)2(aq) + KI(aq); (b) Na2SO4(aq) + KNO3(aq).
Pb2+ needs two I−, so the formula is PbI2, not PbI.
Common input mistake: writing the formula from the old partners (PbI instead of PbI2). Balance charge first, then atoms.
Combustion and thermochemistry
Balance the combustion equation, turn grams into moles, and multiply by the enthalpy per mole, keeping the sign.
A hydrocarbon burns in O2 to give CO2 and H2O. Balance carbon first, then hydrogen, then oxygen last, because O2 appears alone. If the oxygen count comes out odd, double every coefficient.
For heat problems, a negative ΔH means heat is released. If the problem asks for "heat released", give a positive number of kJ; if it asks for q or ΔH, keep the minus sign. For calorimetry, q = m × c × ΔT, with c = 4.184 J/(g·°C) for water.
Balance the combustion of ethane, C2H6.
Carbon 4 = 4, hydrogen 12 = 12, oxygen 14 = 8 + 6.
Propane has ΔH = −2220 kJ per mole of propane burned. How much heat is released when 11.0 g of propane (44.10 g/mol) burns?
Keep extra digits in the middle step and round once at the end.
Common input mistake: dropping or doubling the minus sign. Decide from the wording whether the answer is "released" (positive) or q (negative).
Stoichiometry: grams of one substance to grams of another
Grams to moles, moles to moles with the coefficients, moles back to grams.
There is no shortcut from grams to grams. Divide by the molar mass of what you have, multiply by the mole ratio from the balanced equation, then multiply by the molar mass of what you want.
For limiting reactant problems, run the same chain for each reactant. The one that gives less product is the limiting reactant, and that smaller amount is the answer.
C3H8 + 5O2 → 3CO2 + 4H2O. How many grams of CO2 form from 10.0 g of C3H8? (C3H8 44.10 g/mol, CO2 44.01 g/mol)
The mole ratio 3 : 1 comes from the coefficients, not from the masses.
Common input mistake: skipping the mole ratio and converting grams of propane straight into grams of CO2.
Why Quizlet sets and answer dumps miss
A posted ALEKS chemistry answer is the answer to someone else's problem.
Search results for ALEKS chemistry answers are mostly flashcard sets and paid answer sites. They list a final number for a problem that may share your topic but not your values. If your density block weighs 152.0 g instead of 147.4 g, the posted 7.80 g/cm3 is simply wrong for you.
The methods above work with any numbers. The extension reads the problem with your numbers and shows the answer for it, so you can check your own work against it.
Where it stays off
It is off on LockDown Browser and Respondus pages and on ALEKS placement tests.
ALEKS lets schools require Respondus LockDown Browser, and optionally Respondus Monitor, on Quizzes, Tests and Scheduled Knowledge Checks, and on placement assessments in ALEKS PPL (ALEKS and Respondus FAQs). The extension does not run there, and it gets around nothing. For what is recorded and when, read does ALEKS record you.
For how Knowledge Checks work and what to do on them, read ALEKS knowledge check answers.
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ALEKS chemistry answers: common questions
Does it show ALEKS chemistry answers on Knowledge Checks?
Yes, on Knowledge Checks, Learning mode problems and assignments, as long as the page does not need LockDown Browser. Answers come from AI and can be wrong, so read each answer before you type it.
Does it type the answer into ALEKS for me?
No. The answer card shows on the page, under the problem. You type the answer into the ALEKS answer editor and press the button yourself.
Does it work on structure drawing problems?
Not yet. Structure drawing and some other drawing tools in ALEKS chemistry are not supported. Typed answers with numbers, units, exponents and fractions are supported, and so are problems with tables.
Does it handle units and significant figures?
It reads the units, exponents and fractions in the problem and gives the answer with them. Before you type, check that the answer has the significant figures your data allows and the unit the box asks for.
Does it work on the ALEKS placement test?
No. It is off on ALEKS placement tests and on LockDown Browser and Respondus pages. It gets around nothing.
Is there an ALEKS chemistry answer key I can copy?
Not one that matches your problem. Posted sets and answer dumps answer someone else's problem. If your numbers differ, the answer differs, which is why the methods on this page use the steps, not the numbers.
Is it free?
You get free answers to try it on a real ALEKS problem. Unlimited answers are $14.99 a month, or $48.99 for a 4-month semester plan.
Sources we checked
- ALEKS and Respondus FAQs (ALEKS, PDF), checked 2026-10-25
Your next ALEKS chemistry topic, with the answer under the problem.
Density, conversions, equilibrium, precipitation and stoichiometry. You type it, you submit it.