CH4 + 202 → CO2 + 2H2O
How many grams of O2 produced from 2 moles of H20?

60 g O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Balanced]   CH₄ + 2O₂ → CO₂ + 2H₂O

[Given]   2 mol H₂O

[Solve]   x g O₂

Step 2: Identify Conversions

[RxN] 2 mol H₂O → 2 mol O₂

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of O₂ - 2(16.00) = 32.00 g/mol

Step 3: Stoichiometry

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

64.00 g O₂ ≈ 60 g O₂

Mass of O₂= 64 g

Given

Reaction

CH₄ + 20₂ → CO₂ + 2H₂O

2 moles of H₂O

Required

Mass of O₂

Solution

In a chemical equation, the reaction coefficient shows the mole ratio of the compounds involved in the reaction, reactants or products

From the equation, mol ratio of H₂O  : O₂ = 1 : 1, so moles O₂ :

= 1/1 x moles H₂O

= 1/1 x 2

= 2 moles

Mass of O₂ :

= mol x MW

= 2 x 32 g/mol

= 64 g

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)