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3 years ago

PLEASE HELP. Which element does not form a stable ion with the same electronic structure as argon?

Chemistry

1 answer:

FrozenT [24]3 years ago

4 0

Explanation:

K+ ion has 18 electrons and Argon also has 18 electrons so they do have the same electronic structure.

However, Al3+ ion has 10 electrons and Argon has 18 electrons, so they do not have the same electronic structure.

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How many atoms of Lead are in a 62.7 g sample of Lead(II) permanganate?

Alexandra [31]

Answer:

$\large \boxed {8.48 \times 10^{22}\text{ atoms}}$

Explanation:

1 mol of Pb(MnO₄)₂contains 1 mol of Pb atoms.

1. Moles of Pb

$\text{Moles of Pb} = \text{62.7 g Pb(MnO$_{4}$)}_{2} \times \dfrac{\text{1 mol Pb(MnO$_{4}$)}_{2}}{\text{445.07 g Pb(MnO$_{4}$)}_{2}}\\\\\times \dfrac{\text{1 mol Pb}}{\text{1 mol Pb(MnO$_{4}$)}_{2}} = \text{0.1409 mol Pb}$

2. Atoms of Pb

$\text{Atoms of Pb} = \text{0.1409 mol Pb } \times \dfrac{ 6.022 \times 10^{23}\text{ atoms Pb }}{\text{1 mol Pb }}\\\\= \large \boxed {\mathbf{8.48 \times 10^{22}}\textbf{ atoms Pb }}$

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3 years ago

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3 years ago

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What volume (in L) of carbon dioxide will be produced from the reaction of 37.4 L of oxygen?

Anna [14]

Answer:

21.4 L

Explanation:

Given data:

Volume of carbon dioxide produced = ?

Volume of oxygen = 37.4 L

Solution:

Chemical equation:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

It is known that,

1 mole = 22.414 L

There are 7 moles of oxygen = 7×22.414 = 156.9 L

There are 4 moles of carbon dioxide = 4×22.414 = 89.66 L

Now we will compare:

O₂ : CO₂

156.9 : 89.66

37.4 : 89.66/156.9×37.4 = 21.4 L

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2 years ago

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