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Questions and Answers
Which of the following represents the number of representative particles in one mole of a substance?
Which of the following represents the number of representative particles in one mole of a substance?
What is the simplest ratio of the different elements in a given compound called?
What is the simplest ratio of the different elements in a given compound called?
Which of the following is the mass in grams of one mole of a substance?
Which of the following is the mass in grams of one mole of a substance?
What is the chemical formula of a molecule that includes how many atoms of each element are present in a single molecule called?
What is the chemical formula of a molecule that includes how many atoms of each element are present in a single molecule called?
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What is the ratio of mass that each element in a compound contributes to the total mass of the compound called?
What is the ratio of mass that each element in a compound contributes to the total mass of the compound called?
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Study Notes
Key Concepts in Chemistry
- Avogadro's number is 6.02 x 10^23, representing the number of representative particles in a mole of a substance.
Molecular Composition
- Empirical formula is the simplest ratio of the different elements in a given compound.
- Molecular formula is the chemical formula of a molecule that includes the number of atoms of each element present in a single molecule.
Moles and Mass
- Mole concept: the idea that the number of particles and mass of a substance can be calculated using the SI unit mole.
- Molar mass is the mass in grams of a mole of a substance.
Chemical Properties
- Percent composition is the ratio of mass that each element in a compound contributes to the total mass of the compound.
Related Concepts
- Density is a measure of mass per unit volume.
- Formula unit is a unit of measurement for ionic compounds.
- Gram atomic mass is the mass of an atom of an element in grams.
- Gram formula mass is the mass of a formula unit of a compound in grams.
- Gram molecular mass is the mass of a molecule of a substance in grams.
- Ion is a charged particle formed when an atom gains or loses electrons.
- Molecule is a group of two or more atoms chemically bonded together.
- Representative particles are individual units of a substance, such as atoms, molecules, or ions.
- Scientific notation is a way of writing very large or very small numbers in a compact form.
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Description
Test your knowledge on key content vocabulary related to chemistry, including concepts like Avogadro’s number, empirical formula, molar mass, and the mole concept. Learn about molecular formulas and how to calculate the number of particles and mass of a substance using moles.
