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lesantik [10]
3 years ago
7

All chemical reactions have a conservation of(1) mass, only(2) mass and charge, only(3) charge and energy, only(4) mass, charge,

and energy
Chemistry
2 answers:
Semenov [28]3 years ago
7 0
All chemical reactions have a conversation of mass and energy. 

Because:- There are only two laws for conversation in a chemical reaction. The conversation of mass, no mass can be created nor destroyed. Also, the law of conversation of mass states that no energy can be created nor destroyed in a chemical reaction. The charge can obviously change because they can bond and change charges. 
tankabanditka [31]3 years ago
3 0

<u>Answer:</u> The correct answer is option 4.

<u>Explanation: </u>

<u>Law of conservation of mass</u> states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another. It always remain conserved. In a chemical reaction, mass on the reactant side will be equal to the mass on the product side.

For Example: Reaction of hydrogen and oxygen to form water.

2H_2+O_2\rightarrow 2H_2O

Mass on the reactant side: [tex][2(2\times 1)+(2\times 16)]=36g/mol

Mass on the product side: [2\times ((2\times 1)+16)]=36g/mol

<u>Law of conservation of energy</u> states that energy can neither be created not be destroyed, but it can only be transformed from one form to another. In a chemical reaction, energy given to the reactants is released in the forma of energy of the products.

For Example: Melting of ice. In this process, the energy given to the ice is released in the form of kinetic energy of the water molecules (product).

<u>Law of Conservation of charge</u> states that charge can neither be created not be destroyed, but it can only be transformed from one form to another. In a chemical reaction, total charge on the reactant side will always be equal to the total charge on the product side.

For Example: Reduction of chlorine gas. The chemical equation follows:

Cl_2+2e^-\rightarrow 2Cl^-

Total charge on the reactant side = -2

Total charge on the product side = -2

From the above information, the correct answer is Option 4.

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Fe3+(aq)+6H2O(l)⇌Fe(H2O)63+(aq) : F e 3 + ( a q ) + 6 H 2 O ( l ) ⇌ F e ( H 2 O ) 6 3 + ( a q ) : blank is the Lewis acid and bl
Tasya [4]

Answer:

Lewis acid- Fe3+

Lewis base- water molecule

Explanation:

Acids and bases have been defined in diverse ways. There have been definitions put forward by Arrhenius, Brownstead and Lowry as well as Lewis. Each definition his useful in its own way.

Lewis acids are lone pair acceptors such as metal ions. This implies that in the particular instance of this reaction, Fe3+ is the lewis acid.

Similarly, a Lewis base is a lone pair donor, all ligands are lone pair donors since they donate one or more lone pairs of electrons to Lewis acids. In the particular instance of this reaction, the Lewis base is the water molecule.

6 0
3 years ago
When assigning quantum numbers, how many of the same quantum values may two electrons in the same atom share?
olga55 [171]
Three that is the answer to your question
5 0
3 years ago
50.mL of water is initially 70.k and cooled to 25.k . What is the thermal energy?
r-ruslan [8.4K]
It is 398 thermal energy
7 0
3 years ago
A gas is at 5 Kelvin and 1 m3. The temperature is raised to 10 Kelvin. What is the new volume?2 m32 m5 m
Alja [10]

For this question, suppose the pressure is remained constant, we can use the Charles law to find the answer.


Charles law:

V1/T1 = V2/T2


V1 and T1 are the initial volume and temperature (in K), and V2 and T2 are the final volume and temperature.


We just need to substitute in the numbers in order to find the new volume, V2.

1/5 = V2/10

5V2 = 10

V2 = 2


Therefore, the answer would be 2m3.

5 0
3 years ago
A sample of nitrogen in a glass bulb has a mass of 245 mg. What is this mass in kilograms? Give your answer to the correct numbe
LekaFEV [45]
1 mg = 10⁻⁶ kg

245 mg = 245·10⁻⁶ kg = 2.45·10⁻⁴ kg
3 0
3 years ago
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