Stoichiometry

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What is Stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

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What is a Balanced Chemical Equation?

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A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the law of conservation of mass.

Front

What is a Mole?

Back

A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, ions, etc.).

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What is the Mole Ratio?

Back

The mole ratio is the ratio of the coefficients of any two substances in a balanced chemical equation, used to convert between moles of reactants and products.

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How do you calculate moles from grams?

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To calculate moles from grams, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

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What is a Limiting Reagent?

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The limiting reagent is the reactant that is completely consumed first in a chemical reaction, limiting the amount of product formed.

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What is the Excess Reagent?

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The excess reagent is the reactant that remains after the limiting reagent is completely consumed in a chemical reaction.

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How do you determine the Limiting Reagent?

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To determine the limiting reagent, calculate the moles of each reactant and compare the mole ratios from the balanced equation.

Front

What is the significance of STP in stoichiometry?

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STP (Standard Temperature and Pressure) is used as a reference point for gas calculations, defined as 0°C (273.15 K) and 1 atm pressure.

Front

How many liters of gas are in one mole at STP?

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At STP, one mole of an ideal gas occupies 22.4 liters.