quantitative chemistry Flashcards
Ar (the r is in the middle of the line)
relative atomic mass
Mr (the r is in the middle of the line)
relative formula mass
how do you work out Ar
look at the top number of the element on the periodic table
How do you work out Mr
-work out how many atoms are in each element
-work out Ar
-times the Ar by how many atoms are in each element
-add both the elements together
What is the conservation of mass in terms of atoms
No atoms are lost or gained during a chemical reaction
When is conservation of mass not conserved?
when there are gases involved in the reaction
what is the conservation of mass ?
the amount remains constant, no mass is destroyed or created.
what is the equation that links Moles, mass and relative formula mass (Mr)
Mass -divided my- Mr
what is avorgado’s constant number ?
6.022*10(23) (23 is the indice of 10 in standard form)
what is avorgardos definition ?
the number of atoms in one mole
what is the symbol for avorgardos constant ?
Na (a is in the middle of the line)
what is the equation to work out the mass of 1 atom
Ar divided by Na
What is the equation to work out the mass of 1 molecule
Mr divided by Na
What is the equation to work out the number of atoms ?
Moles*Na
What is the equation to work out the number of molecules ?
Moles*Na
