As the number of carbons in the hydrocarbon increases, the boiling point
increases or decreases

Increases

Explanation:

As the number of carbons in the hydrocarbon increases, the boiling point of increases and volatility reduces.

The increasing number of carbon atoms increases the molecular mass and this will eventually lead to a higher boiling point.

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atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer