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3 years ago

9

Using the symbol below/above determine the number of protons, neutrons, and electrons in the element.

1 answer:

malfutka [58]3 years ago

7 0

Hi,
The correct answer is C.
Protons= 50 (because the atomic number of Sn is 50) —> The atomic number always represent the number of protons

Neutrons= 68 (if you want to find the number of neutrons, you need to do: atomic mass (118 in this case) - your number of protons (50)

Electrons= 46 (50 - 4)

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iogann1982 [59]

Answer: The correct answer is Option B.

Explanation:

To calculate the number of moles, we use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$

<u>Moles of Iron</u>

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Given mass of iron = 558.8

Putting values in above equation, we get:

$Moles=\frac{55.8g}{55.8g/mol}=1mole$

For the given chemical equation:

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By Stoichiometry,

4 moles of Iron produces 2 moles of Iron(III) oxide

So, 1 mole of Ion will produce = $\frac{2}{4}\times 1$ = 0.5 mole of Iron (III) oxide.

Hence, the correct answer is Option B.

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