amount of substance Flashcards
1
Q
how to calculate the number of particles
A
moles x 6.022x10^23
2
Q
RAM?
A
average mass of one atom of an element/ 1 twelfth the mass of a C12 atom
3
Q
how to calculate yield
A
actual/Theo. x 100
4
Q
steps to make a standard solution
A
weigh the weighing boat containing the solid on a 2dp balance
transfer. to beaker and reweigh weighing boat
record difference in mass
add distilled water
stir with glass rod until all solid has dissolved
transfer to volumetric flask using a funnel with washings
make up 250cm^3 mark with water
invert
5
Q
how to calc percentage error
A
(error of equipment/amount measured) x 100
6
Q
what units do volume need to be in ideal gas equation
A
m^3
(cm^3 m^3 is x million)
