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Dominik [7]
3 years ago
10

Calculate the mass of 1.33 mol of copper (II) sulphate

Chemistry
1 answer:
nikklg [1K]3 years ago
5 0

Answer:

a) 13g

Explanation:

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<em>The correct option is A) The atom has changed over the years.</em>

Explanation:

Option A is not correct because an atom does not change. It remains the same always. The structure of an atom will always contain neutrons, protons and electrons.

Scientific theories tend to change over time as new information is brought up. Novel techniques lead to more advanced experiments and results. As a result, a scientific theory is subjected to change whenever evidence is found for a new theory which challenges the older one.

The atomic theory has changed many times due to novel scientific techniques and experiments.

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3 years ago
Which element is oxidized in the reaction below? fe(co)5 (l) + 2hi (g) fe(co)4i2 (s) + co (g) + h2 (g)?
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Oxidation state of I is (-1) and for CO it is zero. Let's assume that the oxidation state of Fe in Fe(CO)₄I₂<span> (s) is x. For whole compound, the charge is zero.

Sum of oxidation numbers in all elements = Charge of the compound.

Here we have 1Fe , 4CO and 2I
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 x + 4*0 + 2*(-1) = 0
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Same as we can find the oxidation state (y) of Fe in Fe(CO)₅(s).
y + 5*0 = 0
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Since oxidation state of Fe increased from 0 to +2, the oxidized element is Fe in the given reaction.
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It is very important<span> to know the shape of a molecule if one is to understand its reactions. It is also desirable to have a simple method to predict the geometries of compounds. For main group compounds, the </span>VSEPR<span> method is such a predictive tool and unsurpassed as a handy predictive method.</span>
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