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Vinvika [58]
3 years ago
14

Which of the following MUST be the same before and after a chemical reaction?

Chemistry
1 answer:
Nady [450]3 years ago
7 0

B

In a chemical reaction, the total mass of the reactants and total mass of the products and the number of atoms of each element involved in the chemical reaction MUST be the same.

Explanation:

The law of conservation of mass in thermodynamic states that mass cannot be destroyed or created in a closed isolated system. This law especially applies to chemical reasons because atoms are not split like in nuclear reactions. This is why chemical equations are balanced to ensure that the number of atoms of every element on both sides of the equation is the same. This ensures that the equation observed this law of thermodynamics.  By balancing the moles on both sides of the equation, this ensures that there is equal the mass of the reactants and products because no mass was created or destroyed in the process.

Learn More:

For more on the laws of conservation of mass and energy check out;

brainly.com/question/12432653

brainly.com/question/6704375

brainly.com/question/13907152

brainly.com/question/12161761

brainly.com/question/9391940

#LearnWithBrainly

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frutty [35]

Answer & Explanation:

You could group them as acids and bases:

<u>Acids</u>

HCl

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<u>Bases</u>

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7 0
3 years ago
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3 years ago
Where is almost all the mass of an atom​
VashaNatasha [74]
The nucleus!! This is made up of protons and neutrons that each weigh about 1 amu.

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8 0
3 years ago
Need help with this.
ankoles [38]
The answer would be D!
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3 years ago
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PLS HELP ASAP, WILL GIVE 100 POINTS.
Ivan

Answer: values of the quantum numbers: -6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6

location of the electron: In the 7th energy level away from the nucleus.

Explanation:

From the description of the problem, the magnetic number is given is as -6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6 and the electron is located in the 7th energy level away from the nucleus. Basically, the problem is testing for the understanding of the principal quantum numbers which gives the location of electrons and the magnetic quantum number that shows the spatial orientation of the orbitals.

           The orbital designation of the describe electron is 7d

Magnetic quantum number is limited by the azimuthal quantum number which is the quantum number describing the possible shapes. The azimuthal is given as L= n-1. "n" is the principal quantum number which is 7. Therefore L is 6 and the magnetic quantum numbers are -6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6

The position of the electron is given by the principal quantum number which represents the main energy level in which the orbital is located or the average distance from the nucleus.

Got it from quasarJose

Hope it helps

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3 years ago
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