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NeTakaya
3 years ago
8

When a __________ is completely dissolved in a __________, a solution is formed.

Chemistry
1 answer:
ValentinkaMS [17]3 years ago
8 0
When a solute is completely dissolved in a solvent, a solution is formed.
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8.8g of Al are necessaries

Explanation:

Based on the reaction, 2 moles of Al are required to produce 3 moles of hydrogen gas.

To solve this question we must find the moles of H2 in 11L at STP using PV = nRT. With these moles we can find the moles of Al required and its mass as follows:

<em>Moles H2:</em>

PV = nRT; PV/RT = n

<em>Where P is pressure = 1atm at STP; V is volume = 11L; R is gas constant = 0.082atmL/molK and T is absolute temperature = 273.15K at STP</em>

Replacing:

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n = 0.491 moles of H2 must be produced

<em />

<em>Moles Al:</em>

0.491 moles of H2 * (2mol Al / 3mol H2) = 0.327moles of Al are required

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<em>Mass Al -Molar mass: 26.98g/mol-:</em>

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What is the atomic mass of one mole of H? g/mole
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