Definitions Flashcards
What is a mole?
The amount of any substance that contains the same number of elementary particles as 12 g of Carbon-12.
What is the relative atomic mass?
The average mass of one atom of an element, relative to Carbon-12 which has a mass of exactly 12.
What is relative molecular mass?
The average mass of one molecule relative to Carbon-12 which has a mass of exactly 12.
What is the standard solution?
A solution of which the concentration is known exactly and is unlikely to change for a period of time.
What is the empirical formula?
The formula that shows the simplest ratio of elements in the compound.
What is the molecular formula?
The formula that shows the actual ratio of elements in a compound.
What is the law of the conservation of matter?
Matter cannot be created nor destroyed, only transferred from one place to another.
How much does a mole of any substance contain?
6,0 x 10^23 (Avogadro’s number) particles of that substance.
Relative Atomic Mass (___) is measured in __ and that Molar Mass (__) is measured in ___.
Ar amu M g/mol
What is concentration?
The ratio of solute in a solution to either solvent or total solution.
What is the solvent?
A solvent is a substance that dissolves a solute, resulting in a solution.
What is the solute?
A solute is defined as the substance that is dissolved in a solution.
What is a solution?
A homogeneous mixture composed of two or more substances.
The conservation of atoms in chemical reactions leads to the principle of the______ of matter and the ability to calculate the mass of products and reactants.
Conservation
What is molar mass?
The mass in grams of one mole of that substance.
How do you prepare a standard solution? (5)
