Refer to the equation C2H5OH(1) + 302(g) → 2C02(g) + 3H2O(g). In a reaction that starts with 3 moles of ethanol and 7 mole of oxygen, the oxygen will be considered the
limiting reactant.
a. true
b. false

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so here we go

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