Chemical Formulae, moles and molarity Flashcards
2
Q
how do you balance chemical equations
A
equal numbers of every atom on both sides of equation
3
Q
what is a mole and give figures
A
large number of particles 6.022 x 10 to 23
4
Q
what is the formula for mass and moles
A
mass in grams = moles x formula mass
5
Q
what is the solute
A
substnace added to solvent which is usually solid
6
Q
what is molarity
A
Moles of solute per litre of solution (mol/dm3)
7
Q
what is molality
A
moles of solute/kg
8
Q
what is mole fraction
A
moles of solute / total moles of solution
9
Q
what is mass percent
A
mass of solute/ mass of solution x 100
10
Q
what is the equation for moles and molarity
A
moles= molarity x litres of solution
11
Q
what is percent composition
A
mass percentage of each element in compound
12
Q
what is empirical formula
A
simplest whole no. ratio
