Chapter 1: Stoichiometric Relationships Flashcards
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.
