Gram Atomic Mass 15 P Phosphorus 30.97 1 mole of an element is equal to its atomic weight expressed...
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Transcript of Gram Atomic Mass 15 P Phosphorus 30.97 1 mole of an element is equal to its atomic weight expressed...
Gram Atomic Mass
15
PPhosphorus
30.97
1 mole of an element is equal to its atomic weight
expressed in grams
1 mole of phosphorus = 30.97 grams
Gram Formula Mass
15
PPhosphorus
30.97
11
NaSodium
22.99
8
OOxygen
16.00
What is the mass of 1 mole of Na3PO4 ?
Sodium: 3(22.99) = 68.97 gramsPhosphorus: = 30.97 gramsOxygen: 4(16.00) = 64.00 grams
+1.00 moles of Na3PO4 = 164 grams
MOLE Mass (g)Volume of a Gas (STP)
Number of Representative Particles
The Mole Map
MOLE Mass (g)Volume of a Gas (STP)
Number of Representative Particles
The Mole Map
How many grams of H2O are in 12.0 moles?
12.0 moles x 18.0 grams
1 mole
= 216 grams
% Composition
What is the % composition of Magnesium chloride?
12
MgMagnesium
24.31
17
ClChlorine
35.45
GFM for MgCl2 = 24.31 + 2(35.45) = 95.21 g
%Mg =
%Cl =
24.31g Mg
95.31 g MgCl2
70.90g Cl
95.31 g MgCl2
= 0.25506 x 100%= 25.51% Mg
= 0.74489 x 100%= 74.49% Cl
