Quantative chemistry Flashcards Preview

Ashley Reyes Chemistry > Quantative chemistry > Flashcards

Flashcards in Quantative chemistry Deck (16):
1

Equation for mass

Moles x Mr

2

Equation for No. of moles

Mass divided by Mr
Concentration x Volume

3

What is conservation of mass?

Mass is never lost or gained in chemical reactions. We ay that mass is always conserved. The total mass of products at the end of the reaction is equal to the total mass of reactants in the beginning.

4

What is the definition of aqueous (aq) ?

It can be dissolved in water.

5

How do you work out the molar mass of a substance ?

Work out the relative formula mass of the substance in the first, then give this number as g/mol for it's molar mass.

6

How do you work out the relative formula mass?

You add together the relative atomic mass (the bigger number) for all the atoms shown in its chemical formula.

7

Unit for molar mass

g/mol

8

Unit for volume

dm (cubed)

9

Volume of gas

mas of gas divided by Mr of gas x 100

10

% mass of an element =

Ar x No. of atoms of element divided by Mr od compound x 100

11

Mass=

Moles x Mr

12

Moles =

Conc x Volume
Mass divided by Mr

13

Atom economy

Mr desired product divided by Mr reactants x 100
Reactions can produce waste by products
Reaction doesn't go to full completion

14

Mr =

Mass divided by moles

15

Conc =

Moles divided by Volume

16

Volume =

Moles divided by conc