Answered

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(mol conversion)How many moles of argon atoms are present in 11.2 L of argon gas at STP? Round your molar mass to whole numbers andgive your answer in the correct number of sig figs and units

Mol ConversionHow Many Moles Of Argon Atoms Are Present In 112 L Of Argon Gas At STP Round Your Molar Mass To Whole Numbers Andgive Your Answer In The Correct N class=

Sagot :

ANSWER

The number of moles of argon is 0.500 mole

EXPLANATION

Given data

The volume of argon at STP = 11.2L

Let x represents the number of moles of argon

Recall that, at STP, 1 mole is equivalent to 22.4L

Hence, we can calculate the number of moles of argon by using the conversion at STP

[tex]\begin{gathered} 1\text{ mole of argon }\rightarrow\text{ 22.4L} \\ x\text{ moles of argon }\rightarrow\text{ 11.2L} \\ \text{cross multiply} \\ 1\cdot\text{ 11.2 = x }\cdot\text{ 22.4} \\ 11.2\text{ = 22.4x} \\ \text{Divide both sides 22.4} \\ \frac{11.2}{22.4}\text{ = }\frac{22.4x}{22.4} \\ x\text{ = 0.5 mole} \\ To\text{ the correct significant figures, the number of moles of argon is 0.500 moles} \end{gathered}[/tex]

Therefore, the number of moles of argon to the correct significant figures is 0.500 mole

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