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3 years ago

How is stoichiometry used to calculate amount of product from amount of reactant?

Chemistry

1 answer:

Nadusha1986 [10]3 years ago

5 0

Answer:

D. The coefficients give the ratio of mole reactant to moles product.

Explanation:

In stoichiometric calculations, the amount of product formed from reactants can be determined.

Using this approach, the number of moles of reactants and products on both sides of the expression must be balanced.
As a rule of thumb, the coefficients give the ratio of moles of reactants to moles of products.
This is very useful in a number of calculations using the stoichiometric approach.

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3 years ago

Copper reacts with silver nitrate through single replacement.

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Answer:

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Part b)

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Explanation:

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5) Moles of each reactant

i) Cu:

Set a proportion using the theoretical mole ratio

1 mole Cu / 2 mole Ag = x / 0.0209 mol Ag

Solve for x: x = 0.0209 / 2 mole Cu = 0.0418 mole Cu

ii) Ag NO₃

Set a proportion using the teoretical mole ratio

2 mole Ag NO₃ / 2 mole Ag = x / 0.0209 mole Ag

Solve for x: x = 0.0209 mol Ag NO₃

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3 years ago

If you want 2 miles of Silver (Ag) from the reaction below, how many grams of copper should you start with? Reaction: Cu + 2AgNO

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Answer:

You should start with 63.54 grams of copper.

Explanation:

The chemical reactions are processes in which the nature of the substances changes, that is, from some initial substances called reactants, totally different ones called products are obtained.

In the chemical reaction, the formulas of reagents and products appear preceded by numbers (the stoichiometric coefficients) that indicate the proportions according to which the transformation occurs. So you can say that stoichiometry establishes relationships between the molecules or elements that make up the reactants of a chemical equation with the products of said reaction. The relationships that are established are MOLAR relationships between the compounds or elements that make up the chemical equation: always in MOLES.

The stoichiometric coefficients of a chemical equation are due to the fact that the atoms present before the reaction must be the same after the reaction, although they will have been rearranged to produce new substances.

If you want 2 moles of silver (Ag), for stoichiometry of the reaction you need a moles of copper Cu. Being the molar mass of copper Cu 63.54 g / mole, then:

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