AP Chemistry 1.1.A: Moles and Molar Mass

Explore AP Chemistry 1.1.A questions on converting among mass, moles, molar mass, Avogadro’s number, and the number of particles using dimensional analysis.

Exam points

Use particle diagrams and evidence to explain how atomic structure relates to chemical behavior and properties.
Apply models of subatomic particles, isotopes and electron arrangement to interpret chemical data.

[Maximum number: 1]

Answer the following questions related to manganese compounds.

Calculate the number of moles of Cl in the sample of $\mathrm{Mn}_{x} \mathrm{Cl}_{y}(s)$ remaining in the beaker.

For the correct calculated value, consistent with part (b):
$1.411 \mathrm{~g} \mathrm{Cl} \times \frac{1 \mathrm{~mol} \mathrm{Cl}}{35.45 \mathrm{~g} \mathrm{Cl}}=0.03980 \mathrm{~mol} \mathrm{Cl}$

1 point

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1.1.A—Calculate quantities of a substance or its relative number of particles using dimensional analysis and the mole… question 1