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Otrada [13]
2 years ago
9

Which statement is completely accurate?

Chemistry
1 answer:
AURORKA [14]2 years ago
3 0

Answer:The same chemical element can have a different number of neutrons and still be the same element. We refer to the atoms of the same element with different numbers of neutrons as "isotopes"

Explanation:

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Step-by-step solution

You will need a balanced equation with masses, moles, and molar masses, so let's gather the information in one place:

M_r:  22.99

          2Na + 2H₂O ⟶ 2NaOH + H₂

m/g:    35

1. Calculate the <em>moles of Na </em>

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2. Calculate the <em>moles of H₂ </em>

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                Molecules of H₂ = 0.761 × (6.022 × 10²³ /1)

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The reaction forms 4.6 × 10²³ molecules of H₂.

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3 years ago
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