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riadik2000 [5.3K]
2 years ago
5

What does conserving mass mean in a chemical equation?

Chemistry
2 answers:
lubasha [3.4K]2 years ago
7 0
The law of conservation of mass states that mass or matter cannot be created or destroyed, only transferred or recombined.
For chemical equations, this law means that each element must be accounted for equally both for reactants and products. So the same numbers of each atom must match on each side, hence the necessity for balancing the chemical equation accurately. This created a field of chemistry called Stoichiometry, which accounts for the conservation of matter throughout chemical reactions and processes.
ExtremeBDS [4]2 years ago
7 0

Conserving mass in a chemical reaction means the atoms of each type should be the same on both the reactant and the product side.

Further explanation:

Balanced chemical reaction:

The chemical reaction that contains an equal number of atoms of the different elements in the reactant as well as in the product side is known as a balanced chemical reaction. The chemical equation is required to be balanced to follow the Law of conservation of mass.

Law of conservation of mass:

According to this law, the mass of an isolated system can neither be created nor be destroyed in any chemical reaction. The mass of reactants and the products should be equal in accordance with this law. In other words, the number of atoms of each type should be same on both sides of the chemical reaction. The reactant is the substance that undergoes a change in itself in a chemical reaction whereas the product is the one that is formed as a result of the chemical reaction.

For example, the balanced chemical reaction between {{\text{P}}_{\text{4}}} and {\text{C}}{{\text{l}}_{\text{2}}} occurs as follows:

{{\text{P}}_4} + 10{\text{C}}{{\text{l}}_2} \to 4{\text{PC}}{{\text{l}}_5}

Here,

{{\text{P}}_{\text{4}}} and {\text{C}}{{\text{l}}_{\text{2}}} are the reactants.

{\text{PC}}{{\text{l}}_5} is the product.

In the above reaction, the number of potassium atoms on both reactant and product side is 4 while the number of chlorine atoms on both sides is 20. So Law of conservation of mass is followed.

Learn more:

1. Balanced chemical equation: brainly.com/question/1405182

2. Write the chemical formula of the compound: brainly.com/question/10585691

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Basic concepts of chemistry

Keywords: balanced chemical reaction, law of conservation of mass, reactant, product, P4, Cl2, PCl5, 10 Cl2, 4 PCl5, atoms, same.

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Oxygen gas generated in the thermal decomposition of potassium chlorate is collected over water. The volume of gas collected is
Leya [2.2K]

The mass of oxygen collected from the thermal decomposition of potassium chlorate at a temperature of 297 K and 762 mmHg is 0.16 g

<h3>How to determine the mole of oxygen produced </h3>

We'll begin by obtaining the number of mole of oxygen gas produced from the reaction. This can be obtained by using the ideal gas equation as illustrated below:

  • Volume (V) = 0.128 L
  • Temperature (T) = 297 K
  • Pressure (P) = 762 – 22.4 = 739.6 mmHg
  • Gas constant (R) = 62.363 mmHg.L/Kmol
  • Number of mole (n) =?

PV = nRT

739.6 × 0.128 = n × 62.363 × 297

Divide both sides by 62.363 × 297

n = (739.6 × 0.128) / (62.363 × 297)

n = 0.0051 mole

Thus, the number of mole of oxygen gas produced is 0.0051 mole

<h3>How to determine the mass of oxygen collected</h3>

Haven obtain the number of mole of oxygen gas produced, we can determine the mass of the oxygen produced as follow:'

  • Mole = 0.0051 mole
  • Molar mass of oxygen gas = 32 g/mole
  • Mass of oxygen =?

Mole = mass / molar mass

0.0051 = mass of oxygen / 32

Cross multiply

Mass of oxygen = 0.0051 × 32

Mass of oxygen = 0.16 g

Thus, we can conclude that the mass of oxygen gas collected is 0.16 g

Learn more about ideal gas equation:

brainly.com/question/4147359

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5 0
1 year ago
State and explain the observations when chlorine gas is bubbled through a solution of
natta225 [31]

Answer:

A reduction-oxidation (redox) reaction will occur.

Chlorine gas (Cl2) will accept electrons to form Cl- ions.

The Iron(II) ions (Fe2+) will lose electrons to form Fe3+ ions. (Iron (III) ions)

Fe2+ ions are green, while Fe3+ ions are yellow,

so the observation will be the solution turning from green to yellow.

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3 years ago
Please Help! It says fill in the blanks to complete the Punnett square below to show the results of a cross between a homozygous
makkiz [27]

Answer:

Genotypes: Homozygous (GG)=50%, Heterozygous (Gg)=50%.

Phenotypes: Homozygous gray (GG)=50%, Heterozygous gray (Gg)=50% or just Gray=100%

Explanation:

Hello,

The Punnett square for this cross turns into:

\left[\begin{array}{ccc}&G&g\\G&GG&Gg\\G&GG&Gg\end{array}\right]

It means that the genotypes and phenotypes are:

Genotypes: Homozygous (GG)=50%, Heterozygous (Gg)=50%.

Phenotypes: Homozygous gray (GG)=50%, Heterozygous gray (Gg)=50% or just Gray=100%

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Using the phase diagram for CO2, what phase is carbon dioxide in at -20°C
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Answer:

A. It is in the gas phase.

Explanation:

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