Casio fx-7400G PLUS Booklet

– 38 –
Industrial Chemistry (2) (Specific Gravity of Gas)
Determine the specific gravity of the following gasses at 0°C, 1 atm.
H
2
, He, C
3
H
8
, CI
2
, SO
2
Method 1
Divide the molecular weight of
the gas by the average molecu-
lar weight of air, which is 29.0
Method 2
Divide the density of the gas by
the density of air, which is 1.293.
EC-5 Specific Gravity of Gas
Exercise
Graphic Calculator Operation
The list function of your graphic calculator can be used to determine that the above two meth-
ods produce similar results.
(1) Calculation Using Method 1
(2) Calculation Using Method 2
H2 He C3H8 Cl2 SO2
Molecular Weight M 244171 64
d 0 = M /29.0
Density ρ0 0.0899 0.1785 2.02 3.220 2.926
d 0 = ρ 0/1.293
JIKKYO SHUPPAN CO., LTD.: KOGYO KAGAKU (p. 92)

Casio fx-7400G PLUS Specifications

General

Model	fx-7400G PLUS
Category	Graphing Calculator
Display	LCD
Display Lines	8
Display Characters	21
Memory	28 KB
Power Supply	Battery
Programming	Yes
Graphing	Yes
Equation Solver	Yes
Statistical Functions	Yes
Connectivity	No
Battery	AAA x 4