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Leto [7]
2 years ago
7

In the modern periodic table, which of the following represents the last pair of elects for which Newlands' Law of Octaves would

hold true?
1. AI and GA
2. AI and SI
3. NE and AR
4. MG and CA
Chemistry
1 answer:
Paladinen [302]2 years ago
3 0

Answer: Mg and Ca

Explanation:

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Two moles of magnesium (Mg) and five moles of oxygen (O2) are placed in a reaction vessel. When magnesium is ignited, it reacts
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Answer:

\boxed{\text{Mg is the limiting reactant}}

Explanation:

We are given the amounts of two reactants, so this is a limiting reactant problem.

We know that we will need moles, so, lets assemble the data in one place.

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From O₂:  

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\text{Moles of MgO} = \text{5 mol O}_{2} \times \dfrac{\text{2 mol MgO}}{\text{1 mol O}_{2}} = \text{10 mol MgO}\\\\\boxed{\textbf{Mg is the limiting reactant}} \text{ because it gives the smaller amount of MgO}

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