KhanAcademyExercises

Practice converting between moles, mass, and number of particles in this set of free questions designed for AP Chemistry students.

Solve age word problems with a system of equations.

Calculate the test statistic and p-value in a chi square test for independence or homogeneity.

Identify the common factors for two numbers.

Check your understanding of bond polarity and bond type in this set of free practice questions designed for AP Chemistry students.

Practice determining the composition of mixtures in this set of free questions designed for AP Chemistry students.

Practice word problems that involve using the fraction bar as division.

Practice dividing 2-, 3-, and 4-digit numbers by a 1-digit number.  Divisors are 6, 7, 8, and 9.  Quotients include remainders.

Practice what you've learned about the winners and losers from inflation and how inflation redistributes wealth in this exercise. 

Let's identify the members of the carbon family present in the homologous series using the general formula.

Let's practice identifying a sweet-smelling compound of ester formed in an esterification reaction.

Let's identify the roles of sulphuric acid and sodium in the given chemical reaction.

Check your understanding of bandwidth and latency in internet connections, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of cryptography and public key encryption, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of the ideal gas law in this set of free practice questions designed for AP Chemistry students.

Check your understanding of phishing attacks and strong/weak passwords, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of lossy and lossless compression techniques, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of HTTP requests and responses, in this set of free practice questions designed for AP Computer Science Principles students.