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Harlamova29_29 [7]
4 years ago
13

What is a correct expression of the law of conservation mass

Chemistry
1 answer:
nekit [7.7K]4 years ago
5 0
Law of conservation of mass- The total mass after a chemical reaction is exactly the same as the mass before.
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Balance the equation pls
mihalych1998 [28]

Answer:

copy and paste this equation into the website

Explanation:

https://en.intl.chemicalaid.com/tools/equationbalancer.php

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What neutral element has the electron configuration described by the Aufbau diagram above.​
devlian [24]

Answer:

Aluminium.

Explanation:

The above electronic configuration can be written in a simplified form as shown below:

1s² 2s²2p⁶ 3s²3p¹

Next, we shall determine the number of electrons in the atom of the element as follow:

Number electron = 2 + 2 + 6 + 2 + 1

Number of electron = 13

Next, we shall determine the number of protons.

Since the element is in its neutral state,

The number of electrons and protons are equal i.e

Proton = Electron

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Proton = Electron = 13

Proton = 13

Next, we shall determine the atomic number of the element.

The atomic number of an element is simply the number of protons in the atom of the element i.e

Atomic number = proton number

Proton = 13

Atomic number = 13

Comparing the atomic number of the element with those in the periodic table, the element with the above electronic configuration is aluminium since no two elements have the same atomic number.

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3 years ago
The smallest unit of a compound is called a ___________.
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Why are fossils<br> important in the<br> development of the<br> geologic time scale?
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