Chapter 1: Stoichiometric Relationships Flashcards
(18 cards)
What is Stoichiometry?
It allows us ti calculate the amounts of substances that are reacting together, and provides a link between what is occurring on a measurable scale.
What is Antoine Lavoisier Credited with?
with revolutionizing modern-day chemistry
What was the paper Methode de Nomenclature Chimique about?
A new unified way to name chemical compounds based on the description of it’s atomic makeup.
What is a Homogenous Mixture?
All Substances have different physical states or densities
What is a Heterogeneous Mixture?
Substances have different physical states or densities.
What is the density of Water @4 Celsius?
1.00
What is the mass of an amu in kg?
1.66x10^-27 Kg
What is a mole?
The amount of a substance that contains the same number of particles as there are atoms in exactly 12 grams of the isotope carbon-12.
What is Avogadro’s number?
6.02x10^23
Determine the number of molecules in 16.00g of molecular oxygen (O2)
Answer: 3.01x10^23
How do you get from Mass to Moles?
Divide by the Molar Mass
How do you get from Moles to Particles?
Multiply by Avogadro’s #
How do you get from Particles to Moles?
Divide by Avogadro’s #
How do you get from Moles to Grams?
Multiply by the Molar Mass
What is Percentage Composition?
Mass of element in composition divided by Molar Mass of composition times 100.
What is water of crystallization?
It’s the number of water molecules present in one formula unit of a crystalline salt.
What is the Empirical Formula?
The lowest whole number ratio of atoms or ion in a compound
What is the Molecular Formula?
The actual number of atoms or ions in a compound
