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3 years ago

According to the law of conservation of mass, in any chemical change:

Chemistry

2 answers:

morpeh [17]3 years ago

4 0

THE MASS is less than

stiks02 [169]3 years ago

3 0

Answer:

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... The carbon atom changes from a solid structure to a gas but its mass does not change. Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

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Which diagram above has 4 valence electrons?

Gemiola [76]

Answer:

answer A has four valence electrons

Explanation:

The outer shell has 4 electrons, which are considered the valence electrons

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3 years ago

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Temka [501]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

The ionization of pure water forms _____.

Evgesh-ka [11]

Answer: The ionization of pure water forms hydroxide and hydronium ions.

Explanation:

Ionization is a reaction in the pure water in which water breaks down into its constituting ions that hydronium ion and hydroxide ions.

$H_2O+H_2O\rightleftharpoons H_3O^++OH^-$

One molecule of water looses its proton to form hydroxide ion and l=the lost protons get associated with another water molecule to form hydronium ion.

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3 years ago

If velocity is positive, which would most likely yield a negative acceleration?

Nataliya [291]

Answer:

An initial velocity that is faster than a final velocity

Explanation:

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3 years ago

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

Katarina [22]

0.38

You first calculate the total moles by dividing the grams by molecular weight:
45 g N2 / 28.02 g/mol = 1.6 mol N2
40 g Ar / 39.95 g/mol = 1.0 mol

Then you divide the moles of Ar by the total number of moles:
1.0 / (1.6 + 1.0) = 0.38 mol fraction

8 0

4 years ago