GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the first thing you must do to solve a stoichiometry problem?
A
Write a Balanced Equation
B
Panic
C
Write an Unbalanced Equation
D
Ask for help
Explanation: 

Detailed explanation-1: -You must start with a balanced equation in order to perform a correct stoichiometry problem. When you have balanced chemical equation, you can determine the number of moles of various species (reactants and products).

Detailed explanation-2: -Stoichiometric coefficients must be added to make the equation balanced. In this example, there are only one sulfur atom present on the reactant side, so a coefficient of 2 should be added in front of H2SO4 to have an equal number of sulfur on both sides of the equation.

Detailed explanation-3: -All stoichiometric calculations begin with a balanced equation. Balanced equations are necessary because mass is conserved in every reaction. The number and kinds of atoms must be the same in the reactants and products.

Detailed explanation-4: -Step 1: Extract all measurement data from the task. Step 2: Convert all units of measurement to the same base units. Step 3: Write a balanced reaction. Step 4: Determine the stoichiometry of species. Step 5: Calculate the desired quantity. 03-Jan-2012

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