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Chapter 1: Problem 34

The number of oxygen atoms present in 2 moles of a compound, which consists of a bivalent metal and a perchlorate ion is (a) \(4 \mathrm{~N}\) (b) \(6 \mathrm{~N}\) (c) \(8 \mathrm{~N}\) (d) \(16 \mathrm{~N}\)

Short Answer

Expert verified
Answer: \(16 \mathrm{~N}\) (16 times the Avogadro's number)

Step by step solution

01

Determine the molecular formula of the compound

The perchlorate ion has the formula ClO4-. Since we have a bivalent metal, it means the charge of the metal is +2. Let's represent this metal by symbol M. Thus, we can write the molecular formula of the compound as M(ClO4)2.
02

Calculate the number of oxygen atoms in one mole of the compound

In the molecular formula M(ClO4)2, we have 2 perchlorate ions, each containing 4 oxygen atoms. Therefore, in one mole of the compound, there will be 2 * 4 = 8 moles of oxygen atoms.
03

Calculate the number of oxygen atoms in 2 moles of the compound

Now, we need to find the number of oxygen atoms in 2 moles of the compound. Since there are 8 moles of oxygen atoms in 1 mole of the compound, there will be 2 * 8 = 16 moles of oxygen atoms in 2 moles of the compound. Here, N represents Avogadro's number, which is the number of entities (atoms, molecules, ions, etc.) in one mole. Hence, the number of oxygen atoms in 2 moles of the compound is equal to 16 ℕ. The correct option is: (d) \(16 \mathrm{~N}\)

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Most popular questions from this chapter

State whether the following statements are true or false. When a \(200 \mathrm{ml}\) gas, in a closed vessel, is heated to \(50^{\circ} \mathrm{C}\) from \(25^{\circ} \mathrm{C}\), the volume becomes doubled.

The weight of an empty china dish is \(39 \mathrm{~g}\) and when a saturated solution of potassium nitrate is poured into it, its weight is \(108 \mathrm{~g}\) at \(50^{\circ} \mathrm{C}\). After evaporating the solution to dryness, if the weight of the dish along with the crystals is \(72 \mathrm{~g}\) then the solubility of potassium nitrate at \(50^{\circ} \mathrm{C}\) is (a) \(83.9\) (b) \(95.6\) (c) \(91.6\) (d) \(87.4\)

Select the correct alternative from the given choices. The ratio by mass of sulphur and oxygen in \(\mathrm{SO}_{2}\) is (a) \(1: 2\) (b) \(2: 1\) (c) \(1: 1\) (d) \(1: 4\)

Arrange the following compounds in the correct order of percentage of metallic element. (a) potassium hydroxide (b) potassium carbonate (c) potassium bicarbonate (d) potassium sulphide (a) \(\mathrm{a}>\mathrm{b}>\mathrm{c}>\mathrm{d}\) (b) \(b>a>c>d\) (c) \(c>b>a>d\) (d) \(\mathrm{d}>\mathrm{a}>\mathrm{b}>\mathrm{c}\)

A certain mass of a gas occupies a volume of 600 \(\mathrm{ml}\) at a certain temperature and pressure. If pressure is decreased by \(40 \%\) what will be the volume occupied by the same mass of the gas at the same temperature? (a) \(240 \mathrm{ml}\) (b) \(1000 \mathrm{ml}\) (c) \(300 \mathrm{ml}\) (d) \(120 \mathrm{ml}\)
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