11. C 12 กรัมจะมีจานวน อะตอม
12C มวล 12 g
มีจานวนอะตอม C = 6.02 x 1023 อะตอม
จานวนอะตอม C = 12 x 1.66 x 10-24 g C
= 6.02 x 1023 อะตอม C
12 g C 1 อะตอม C
33. Mole Relationships
Name Formula Formula
weight
(u)
Mass of
1 mol of
formula units
(g)
Number and kind of
particles in 1 mol
Atomic
nitrogen
N 14.0 14.0 N 6.02x1023 atoms
Molecular
nitrogen
N2 28.0 28.0 N2 6.02x1023
molecules
silver Ag 107.9 107.9 Ag 6.02x1023 atoms
Silver ion Ag+ 107.9 107.9 Ag+ 6.02x1023 ions
34. Mole Relationships
Name Formula Formula
weight
(u)
Mass of
1 mol of
formula units
(g)
Number and kind of
particles in 1 mol
Barium
chloride
BaCl2 208.2 208.2 BaCl2 6.02x1023
units
Ba2+ 6.02x1023 ions
Cl- 2(6.02x1023) ions
BaCl2 → Ba2+ + 2Cl-
35. Molar Mass Worksheet
Calculate the molar masses of the following chemicals:
1) Cl2
2) KOH
3) BeCl2
4) FeCl3
5) BF3
http://misterguch.brinkster.net/conversionsworksheets.html
36. Grams/Moles Calculations
Given the following, find the number of moles:
1) 30 grams of H3PO4
2) 25 grams of HF
3) 110 grams of NaHCO3
4) 1.1 grams of FeCl3
5) 987 grams of Ra(OH)2
http://misterguch.brinkster.net/conversionsworksheets.html
37. Given the following, find the number of grams:
9) 4 moles of Cu(CN)2
10) 5.6 moles of C6H6
11) 21.3 moles of BaCO3
12) 1.2 moles of (NH4)3PO3
38. Moles, Molecules, and Grams Worksheet
1) How many molecules are there in 24 grams of FeF3?
2) How many molecules are there in 450 grams of Na2SO4?
3) How many grams are there in 2.3 x 1024 atoms of silver?
4) How many grams are there in 7.4 x 1023 molecules of
AgNO3?
http://misterguch.brinkster.net/conversionsworksheets.html
39. Molar Mass Worksheet
Calculate the molar masses of the following chemicals:
1) Cl2 71 g/mol
2) KOH 56.1 g/mol
3) BeCl2 80 g/mol
4) FeCl3 162.3 g/mol
5) BF3 67.8 g/mol
Grams/Moles Calculations
Given the following, find the number of moles:
1) 30 grams of H3PO4 0.31 moles
2) 25 grams of HF 1.25 moles
3) 110 grams of NaHCO3 1.31 moles
4) 1.1 grams of FeCl3 0.0068 moles
5) 987 grams of Ra(OH)2 3.80 moles
Given the following, find the number of grams:
9) 4 moles of Cu(CN)2 462 grams
10) 5.6 moles of C6H6 436.8 grams
11) 21.3 moles of BaCO3 4,202.5 grams
12) 1.2 moles of (NH4)3PO3 159.6 grams
Moles, Molecules, and Grams Worksheet
1) How many molecules are there in 24 grams of FeF3? 1.28 x 1023 molecules
2) How many molecules are there in 450 grams of Na2SO4? 1.91 x 1024 molecules
3) How many grams are there in 2.3 x 1024 atoms of silver? 421 grams
4) How many grams are there in 7.4 x 1023 molecules of AgNO3? 209 grams
53. NO2
0.25 mol
NO2 1.51x1023 molecules
NO2
11.53 g
NO2
5.62 dm3
จงหามวลและปริมาตรที่ STP ของ
แก๊ส NO2 1.51 x 1023 molecules
6.02x10 23
Mw x x 22.4 dm3
54. 1. A sample of ammonia contains 0.500 mol.
What volume at STP would the gas
occupy?
2. Calculate the number of moles contained
in 6.500 L of sulfur dioxide at STP.
9. 11.2 L
11. 0.290 mol
Factor Label Method
55. 3. If a balloon filled with carbon dioxide gas
occupies a volume of 31 L at STP, what is the
mass of the gas?
4. What volume would a 200.0 g sample of
hydrogen sulfide gas occupy at STP?
10. 61 g
12. 131 L
Factor Label Method