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Nutka1998 [239]
3 years ago
12

Ion R2+ có phân lớp ngoài cùng là 3p6

Chemistry
1 answer:
amm18123 years ago
4 0
Ok and bro???? Like what even lol
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Examples of a pure substances
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Answer:

Explanation:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements.

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Answer: 92 kg

Explanation:

because the rest of them are increasing weight or not changing at all and if you were to go to the moon you would weigh less

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What viral components might serve as good targets for the design of antiviral chemicals?
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Specific events in virus replication identified as targets for antiviral agents are viral adsorption, penetration, uncoating, and viral nucleic acid synthesis as well as viral protein synthesis.

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Evaluate the nature of the thermal vibrations in each of the four states of matter
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2 years ago
Which chemical equation shows that the total mass during a chemical reaction stays the same?
k0ka [10]

Answer:

  • Option A) <u><em>Mg + Cl₂ → MgCl₂</em></u>

Explanation:

The law of conservation of mass is guaranteed in a chemical equation. Since the mass of the atoms do not change, that means that the number of each kind of atoms in the reactant side is equal to the number of atoms of the same kind in the product side.

The first equation is:

<em><u>A) Mg + Cl₂ → MgCl₂</u></em>

<u />

Number of atoms:

        atom      Reactant side        Product side

          Mg                1                              1

           Cl                 2                             2

Therefore, the table displays that there are the same number of atoms of each kind on both sides, showing that<em> the total mass during the chemical reaction stays the same.</em>

<u />

<em><u>B) NaOH + MgCl₂ → NaCl + MgOH</u></em>

This equation displays 2 atoms of Cl on the left side and 1 atom of Cl on the right side; thus, it is not showing that the total mass stays the same during the chemical reaction.

<em />

<u><em>C) 2Na + 2H₂O → NaOH + H₂</em></u>

Neither the sodium, nor oxygen, nor hydrogen atoms are balanced. Thus, this does not show that the total mass stays the same.

<u><em /></u>

<u><em>D) H₂O + O₂ → H₂O</em></u>

The reactant side contains 3 oxygen atoms and the product side contains 1 atoms of oxygen; thus, this is not balanced: it does not show that the total mass stays de same during the chemical reaction.

5 0
2 years ago
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