All Flashcards
Label the components of an atom.
1: Protons (in nucleus), 2: Neutrons (in nucleus), 3: Electrons (orbiting nucleus)
What is a mole?
A mole is a unit representing 6.022 x 10²³ particles (atoms, molecules, ions, etc.).
What is molar mass?
The mass in grams of one mole of a substance, expressed in g/mol.
What is Avogadro's number?
The number of particles in one mole of a substance: 6.022 x 10²³.
What is dimensional analysis?
A technique for converting between different units using conversion factors to cancel out unwanted units.
Define atomic mass.
The mass of one atom in atomic mass units (amu); numerically equal to molar mass in g/mol.
What are the steps to calculate the molar mass of a compound?
- Break down the compound into its constituent elements. 2. Look up the atomic masses of each element on the periodic table. 3. Multiply each atomic mass by the number of atoms of that element in the compound. 4. Sum the results to obtain the molar mass.
What are the steps for converting grams to moles?
- Identify the substance and its molar mass. 2. Divide the given mass (in grams) by the molar mass (in g/mol). 3. The result is the number of moles.
What are the steps for converting moles to grams?
- Identify the substance and its molar mass. 2. Multiply the given number of moles by the molar mass (in g/mol). 3. The result is the mass in grams.
What are the steps for converting moles to number of particles?
- Identify the substance and the number of moles. 2. Multiply the number of moles by Avogadro's number (6.022 x 10²³ particles/mol). 3. The result is the number of particles.
What are the steps for converting number of particles to moles?
- Identify the substance and the number of particles. 2. Divide the number of particles by Avogadro's number (6.022 x 10²³ particles/mol). 3. The result is the number of moles.