Answer:
other the effect of temperature on plants
Fluorine has the highest. Fluorine's electronegativity is 4.0
Answer:
a metal spoon left in boiling water
Explanation:
Electron
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Answer: The molar mass of each gas
Explanation:
Mole fraction is the ratio of moles of that component to the total moles of solution. Moles of solute is the ratio of given mass to the molar mass.

Suppose if there are three gases A, B and C.
a) 
b) 
c) 
moles of solute =
Thus if mass of each gas is known , we must know the molar mass of each gas to know the moles of each gas.