Chemistry College

Which of the following chemical equations proves that the law of conservation of mass is in effect?
Question 2 options:


Mg2 + LiBr ---> LiMg + Br


2KCl + F2 ---> 2KF + Cl2


Na +O2 ---> Na2O


H20 ---> H2 + O2

Answers

Answer 1

Answer:

2KCl + F₂   →     2KF + Cl₂

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

2KCl + F₂   →     2KF + Cl₂

In this equation mass of reactant and product is equal. There are 2 potassium 2 chlorine and fluorine atoms on both side of equation it means mass remain conserved.

All other options are incorrect because mass is not conserved.

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The process by which cells divide is called
A
O replication
B.
mitosis
C.
respiration
D.
photosynthesis

Answers

the answer is mitosis

what is the periodic table elements

Answers

Answer:  

Here is a picture of all the elements

Answer:

The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Explanation:

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Why did the French set up trading posts in North America?

Answers

Answer: Their main aim was to provide goods, specifically furs and sugar exportation.

Explanation:

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