P1: 2 Amount of Substance Flashcards
What is relative atomic mass?
The weighted average mass of an atom of an element, taking into account its naturally occurring isotopes, relative to 1/12 the RAM of an atom of carbon-12.
What is the term ‘relative formula mass’ used for?
Ionic compounds.
What is an empirical formula?
The simplest whole number ratio of atoms of each element in a compound.
What is a molecular formula?
The actual number of atoms of each element in a compound.
What is the equation for percentage atom economy?
Molecular mass of desired product/ sum of molecular masses of all reactants x 100
What is relative molecular mass?
The average mass of a molecule on a scale where an atom of carbon-12 is 12g.
What is the ideal gas equation? What are the SI units for each component?
pV = nRT
p = Pa
V = m^3
n = number of moles
R = gas constant
T = K
How do you convert from kPa to Pa?
X 1000
How do you convert from dm^3 to m^3?
/1000
How do you convert from degrees C to K?
+ 273
How do you convert from cm^3 to m^3?
/ 1x 10^6
What are the advantages of having a high atom economy?
- less waste
- more sustainable as more raw materials are used
- less expensive
