Question

A component is composed of 0.08610 moles of platinum and 0.08480 moles of silver.

Determine total mass of the component?

Weight percent of platinum?

Answer 1

Number of moles of Platinum = 0.08610 mol.

Molar mass of Platinum = 195.09 g/mol

Mass of Platinum can be obtained by using the formula

Moles = Mass / Molar mass

0.08610 mol = Mass / 195.09

Mass of Platinum = 0.08610 x 195.09 = 16.79 g

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Number of moles of Silver = 0.08480 mol.

Molar mass of Platinum = 107.86 g/mol

Mass of Platinum can be obtained by using the formula

Moles = Mass / Molar mass

0.08480 mol = Mass / 107.86

Mass of Platinum = 0.08480 x 107.86 = 9.15 g

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Total mass of the component = Mass of Platinum + Mass of silver

= 16.79 + 9.15

=25.94 g

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Weight percent of Platinum = (Mass of Platinum / Total weight of component) x 100

= (16.79 / 25.94) x 100

= 64.73%