Examlex
From the following information,determine the enthalpy of formation of C2H4(g) . C2H4(g) → C(s) + H2(g) ; ΔH = -26.2 kJ
Field Diameter
The apparent size of an area visible through the microscope lens, often measured in millimeters or micrometers.
Millimeters
A unit of length in the metric system, equal to one thousandth of a meter.
Iris Diaphragm
A thin, adjustable circular structure in optical devices or the eye that controls the amount of light passing through by changing its size.
Condenser
A device used to condense a gas or vapor into a liquid.
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