Chapter 1.6 The Mole Flashcards
1
Q
The gram formula mass of a substance is the mass of
A
one mole of that substance
2
Q
What is the mass of one mole of potassium oxide?
A
K2O
(39 x 2) + (16)
= 94g
3
Q
Mole Calculations: The the M, M, FM triangle, the M at the top of the triangle stands for what?
A
Mass
4
Q
How many moles are present in 25g of calcium carbonate?
A
CaCO3
40+12+(16x3)
100g
Moles = Mass/FM 25/100 = 0.25 moles
5
Q
MCV triangle is used to calculate
A
concentrations of solutions
6
Q
What triangle would you use for this question: Calculate the concentration of a sodium hydroxide solution if 2 moles are dissolved in water to give 500cm3 of solution?
A
MCV
7
Q
Balance the equation: Ca O2 —> CaO
A
2Ca + O2 —–> 2CaO
