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Chemistry

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Allushta [10]1 year ago

3 0

A. The mass of the reactant is 88 g

B. The mass of the product is 88 g

C. The data supports the law of conservation of matter (mass)

<h3>What is a chemical equation? </h3>

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

<h3>A. How to determine th mass of the reactant</h3>

Balanced equation: C + O₂ --> CO₂
Mass of carbon = 24 g
Mass of oxygen = 64 g
Mass of reactant = ?

In the equation, carbon (C) and oxygen (O) are the reactants. Thus we can determine the mass of the reactant as follow:

Mass of reactant = mass of C + mass of O

Mass of reactant = 24 + 64

Mass of reactant = 88 g

<h3>B. How to determine the mass of product</h3>

Balanced equation: C + O₂ --> CO₂
Mass of carbon = 24 g
Mass of oxygen = 64 g
Mass of product = ?

In the equation, CO₂ is product. Thus we can determine the mass of the product as follow:

From the law of conservation of matter,

Mass of reactant = Mass of product

But,

Mass of reactant = 88 g

Thus,

Mass of product = 88 g

Learn more about chemical equation:

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Answer: The atomic weight of silver is 107.87 amu

Explanation:

Mass of isotope silver-107 = 106.91 amu

% abundance of isotope silver -107 = 51.84% = $\frac{51.84}{100}=0.5184$

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Formula used for average atomic mass of an element :

$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(106.91\times 0.5184)+(108.90\times 0.4816)]$

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