2 C8H18(l) + 25 O2(g) 16 CO2(g) + 18 H2O(l) a) How many moles of O2 are needed to burn 1.95 mol of C8H18? mol (b) How many grams of O2 are needed to burn 1.45 g of C8H18? g (c) Octane has a density of 0.692 g/mL at 20°C. How many grams of O2 are required to burn 2.55 gal. of

2 C8H18(l) + 25 O2(g) 16 CO2(g) + 18 H2O(l) a) How many moles of O2 are needed to burn 1.95 mol of C8H18? mol (b) How many grams of O2 are needed to burn 1.45 g of C8H18? g (c) Octane has a density of 0.692 g/mL at 20°C. How many grams of O2 are required to burn 2.55 gal. of

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter2: Atoms And Molecules

Section: Chapter Questions

Problem 2.32E

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

2 C₈H₁₈(l) + 25 O₂(g) 16 CO₂(g) + 18 H₂O(l)

a) How many moles of O₂ are needed to burn 1.95 mol of C₈H₁₈?
mol

(b) How many grams of O₂ are needed to burn 1.45 g of C₈H₁₈?
g

(c) Octane has a density of 0.692 g/mL at 20°C. How many grams of O₂ are required to burn 2.55 gal. of C₈H₁₈? 1 gal = 3.79 L.
g

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