Metals such as silver and gold are often found in nature as free metals because they are Select one:
a. strong reducing agents
b. weak reducing agents
c. easily oxidized
d. poor electrocal conductors

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14 days is the half-life of phosphorus-32

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.