Stoichiometric Calculations

Front

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 balanced chemical equations.

Front

What does STP stand for in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere pressure.

Front

In the reaction 2K + F2 → 2KF, how many moles of KF are produced from 2 moles of K?

Back

2 moles of KF are produced.

Front

What is the mole ratio of MgO to Fe in the reaction 3 Mg + Fe2O3 → 3 MgO + 2 Fe?

Back

The mole ratio of MgO to Fe is 3:2.

Front

How do you calculate the mass of a product formed in a reaction?

Back

To calculate the mass of a product, use the formula: mass = moles × molar mass.

Front

What is the molar mass of CO2?

Back

The molar mass of CO2 is 44.01 g/mol.

Front

If 35g of O2 reacts in the reaction CH4 + 2O2 → 2H2O + CO2, how much CO2 is produced?

Back

24.1 g of CO2 is produced.

Front

In the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of hydrogen are produced from 120g of Na?

Back

5.2 g of hydrogen is produced.

Front

What is the significance of a balanced chemical equation?

Back

A balanced chemical equation ensures that the number of atoms for each element is conserved in a chemical reaction.

Front

What is the concept of limiting reactants?

Back

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