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2 years ago

2. Calculate the number of moles represented by the following masses.

Chemistry

1 answer:

aliina [53]2 years ago

3 0

a. There are 1.85 moles in 2.00 × 10² g of silver (Ag).

b. There are 0.618 moles in 37.1 g of silicon dioxide (SiO₂)

<h3>What is the molar mass?</h3>

The molar mass is the mass in grams of 1 mole of particles, that is, the mass in grams of 6.02 × 10²³ particles. The units are g/mol.

We want to calculate the number of moles represented by different masses of different substances. In each case, the conversion factor between mass and moles is the molar mass.

a. 2.00 × 10² g of silver (Ag)

The molar mass of silver is 107.87 g/mol.

2.00 × 10² g × (1 mol/107.87 g) = 1.85 mol

b. 37.1 g of silicon dioxide (SiO₂)

The molar mass of silicon dioxide is 60.08 g/mol.

37.1 g × (1 mol/60.08 g) = 0.618 mol

a. There are 1.85 moles in 2.00 × 10² g of silver (Ag).

b. There are 0.618 moles in 37.1 g of silicon dioxide (SiO₂)

Learn more about molar mass here: brainly.com/question/21334167

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To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

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Determine the number of atoms of each element in the empirical formula of a compound with the following composition:

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C = 68.75 g / 12.01 g/mol = 5.72 mol
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