Consider the reaction: Na2CO3 + 2HCl → 2NaCl + CO2 + H2O. A minimum of _____ moles of sodium carbonate is needed to fully react with 750 g of HCl

The balanced equation is: 2Fe + 3F2 ⇒ 2FeF3

How to balance an equation?

A chemical equation needs to be balanced if you want to make the wide variety of the atoms of the reactants equal to the variety of the atoms of the goods.

Given,

Iron + fluorine ⇒ Iron Flouride

Fe + F2 ⇒ FeF3

Now to balance this reaction:

2Fe + 3F2  ⇒ 2FeF3

This reaction is balanced.

What is iron fluoride used for?

This medicine is a mixture manufactured from nutrients, iron, and fluoride. it's miles utilized in infants and youngsters to deal with or prevent deficiency because of terrible weight loss programs or low tiers of fluoride in drinking water and other sources.

Learn more about iron fluoride here: brainly.com/question/24072912

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Answer:

iron+flourine.............iron flouride

Fe+F2.............FeF3

the above reaction is not balanced

now to balance this reaction

2Fe+3F2...........2FeF3

now this reaction is balanced

Among the choices given, the best answer is the third option. Melting ice shows an increase in entropy. Entropy is the degree of disorderliness in a system. Among the phases, solid has the most ordered structure which means it has the least entropy. The ice melting shows a phase change from solid to liquid. Liquid molecules are more disorganized than the solid thus there is an increase in entropy.

Answer: melting ice

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

1. condensation of water : Condensation process is a process where gaseous state changes to liquid state., thus decreasing randomness and decreasing entropy.

2. Freezing water : Freezing process is a process where liquid state changes to solid state, thus decreasing randomness and decreasing entropy.

3. melting ice: Fusion process is a process where solid state changes to liquid state, thus increasing randomness and increasing entropy.

4. deposition of : deposition process where gaseous state changes to solid state by escaping liquid state, thus decreasing randomness and decreasing entropy.

Answer: Option (3) is the correct answer.

Explanation:

When two substances or objects at the same temperature do not exchange heat with each other then this state is known as thermal equilibrium.

Whereas latent heat is the release or absorption of energy at a constant temperature.

Specific heat is the amount of heat per unit mass necessary to increase the temperature by one degree Celsius.

Heat of fusion is the amount of energy required to change the state of matter or substance.

Thus, we can conclude that out of the given options, thermal equilibrium describes the point when two objects reach the same temperature and there is no longer a transfer of energy through heat.