Question 1
On the planet Kracalac, in another solar system, argon has three naturally occurring isotopes as follows:
Isotope Mass (amu) Natural Abundance (%)
Argon-36 35.968 10.65
Argon-38 37.963 15.15
Argon-40 39.962 74.20
What is the average atomic mass of argon on Kracalac?
◦
35.97 amu◦
39.96 amu◦
37.96 amu◦
39.23 amu◦
40.00 amuQuestion 2
One commercial system removes SO2 emissions from smoke at 95.0°C by the following set of balanced reactions:
SO2 + Cl2→ SO2Cl2
SO2Cl2 + 2H2O → H2SO4 + 2HCl
H2SO4 + Ca(OH)2→ CaSO4 + 2H2O
Assuming the process is 95.0% efficient, how many grams of CaSO4 may be produced from 100. grams of SO2?
(molar masses: SO2, 64.1 g/mol; CaSO4, 136 g/mol)
◦
44.8 g◦
47.1 g◦
87.2 g◦
202 g◦
212 g
The central and peripheral nervous system
Female genital and reproductive system.
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The Vascular System