Stoichiometry
Which of the following gravity scales is used exclusively for liquids heavier than water?

Baumme scale
None of these
Twaddel scale
API scale

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Stoichiometry
Pick out the wrong unit conversion of thermal conductivity.

1 BTU/ft².hr.°F/inch = 1.488 kcal/m². hr.°C/m
1 BTU/ft².hr.°F/ft = 1.488 kcal/m². hr.°C/m
1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K
1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F

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Stoichiometry
Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

Sizes of the component molecules are approximately equal
All of these
Attractive forces between like and unlike molecules are approximately equal
Component molecules are non-polar and no chemical combination or molecular association between unlike molecules takes place in the formation of the solution

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