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weqwewe [10]
3 years ago
6

Calculate the volume of helium gas sample that has a mass of 1.2 g at room conditions

Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
3 0
1.2over2=0.6 as molarity then we know that molar volume=22.4dm3
molarity=volume per molar volume
therefore volume=molarity ×molar volume= 0.6 x 22.4= 13.44
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Answer: 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

Explanation:

The given reaction equation is as follows.

2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}

This shows that 2 moles of Al reacts with 6 moles of HCl. So, the amount of HCl required to react with 1 mole Al is three times the amount of HCl.

Therefore, 3 moles of Al will react with 9 moles of HCl to give 3 moles of AlCl_{3} and \frac{9}{2} moles of H_{2}.

The reaction equation now will be as follows.

3Al + 9HCl \rightarrow 3AlCl_{3} + \frac{9}{2}H_{2}

The moles \frac{9}{2} can also be written as 4.5 moles.

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3 years ago
A very hot cube of copper metal (32.5 g) is submerged into 105.3 g of water at 15.4 0C and it reach a thermal equilibrium of 17.
zysi [14]

Answer:

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