3 years ago

A single atom of platinum has a mass of 3.25 x 10-22g. What is the mass of 6.0 x 1023 platinum atoms?

1 answer:

6 0

Even though the numbers are in scientific notation, they are still just numbers. Essentially the question is as simple as "An apple weighs an ounce, how much do 35 apples weigh?". So all you have to do is multiply.

3.25 x $10^{-22}$ x 6.0 x $10^{23}$ = 195

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3 years ago

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3 years ago

Calculate the molality of a solution containing 100.7 g of glycine (NH2CH2COOH) dissolved in 3.466 kg of H2O.

LuckyWell [14K]

Answer : The molality of a solution is, 0.387 mol/kg

Explanation : Given,

Mass of solute (glycine) = 100.7 g

Mass of solvent (water) = 3.466 kg

Molar mass of glycine = 75.1 g/mole

Formula used :

$Molality=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent}}$