Formulas Flashcards
(16 cards)
1
Q
What is the formula for moles?
A
2
Q
A: Moles = Mass (g) ÷ Mr (or Ar)
A
3
Q
Q: What is the formula for mass?
A
4
Q
A: Mass = Moles × Mr
A
5
Q
Q: What is the formula for Mr (Relative Formula Mass)?
A
6
Q
A: Mr = Sum of Ar of all atoms in the formula
A
7
Q
Q: What is the formula for Ar (Relative Atomic Mass)?
A
8
Q
A: Ar = (Isotope₁ × % Abundance₁ + Isotope₂ × % Abundance₂) ÷ 100
A
9
Q
⸻
A
10
Q
CONCENTRATION
A
11
Q
Q: What is the formula for concentration?
A
12
Q
A: Concentration (mol/dm³) = Moles ÷ Volume (dm³)
A
13
Q
Q: How do you convert cm³ to dm³?
A
14
Q
A: Volume (dm³) = Volume (cm³) ÷ 1000
A
15
Q
Q: How do you calculate number of neutrons?
A
16
Q
A: Neutrons = Mass number – Atomic number
A
