Chem Unit 3 Lesson 1 Flashcards
What is a Qualitative analysis?
The process of identifying substances present in a sample, with no measurements involved
What is a Quantitative analysis?
The process of measuring the quantity of a substance in a sample (using numerical data)
What is a Mole?
A convenient measure of an amount of matter
What is the symbol and unit for Mol?
The symbol is “n” and the unit for mole is “mol”
What is the definition of Avogadro’s number?
the number of atoms, molecules, formula units, ions, etc, in 1 mole of substance
What is Avogadro’s Number?
6.02x10^23
What symbol is Avogadro’s number represented by?
represented by the symbol NA
What does 1 mole equal?
It’s equal to 6.022 × 10²³ units
What is Molar Mass?
The mass of one mole (Avogadro’s number) of substance (atoms, ions, molecules, formula units, etc)
What is the symbol for Molar Mass?
MM
What is the symbol for the amount of substance (in moles)?
It’s n
Is Molar Mass expressed in u?
No it’s expressed in g/mol with 2 decimal places
What is Molecular mass?
the atomic mass of one molecule (unit is u)
Molecular and Molar mass have the same _____ but different ______.
Same number but different units
What is formula mass?
the atomic mass of one formula unit (unit is u)
