![]() You can use any calculator for free without any limits. Mass(MgO) = (1 × 0.50) × (24.31 + 16.00) = (1 × 0.50) × 40. Calculator.tech provides online calculators for multiple niches including mathematical, financial, Health, informative, Chemistry, physics, statistics, and conversions. (a) Calculate moles(Mg) = mass(Mg) ÷ molar mass(Mg) (3) Use the mole ratios to calculate the mass of O 2 consumed and MgO produced as shown below: Moles(Mg) : moles(O 2) : moles(MgO) is 2:1:2 (2) Determine the mole ratio (stoichiometric ratio) from the equation, Mg : O 2 : MgO (1) Write the balanced chemical equation for the chemical reaction: The Question: 12.2 g of magnesium metal (Mg (s)) reacts completely with oxygen gas (O 2(g)) to produce magnesium oxide (MgO (s)).Ĭalculate the mass of oxygen consumed during the reaction and the mass of magnesium oxide produced. Take the exam now! Worked Example of Using Mole Ratio to Calculate Mass of Reactant or Product (c) Use the mole ratio to calculate moles MgO Moles(MgO) : moles(Mg) is 2:2 which is the same as 1:1 (b) Use the balanced equation to determine the mole ratio MgO:Mg
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