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Artist 52 [7]
2 years ago
9

For fish to survive in your aquarium, you need to have a saturated solution of oxygen in the water. Suppose your aquarium holds

250L of water. How many grams of oxygen do you need to pump into the tank?
Chemistry
1 answer:
solmaris [256]2 years ago
7 0

Answer:

The mass of oxygen needed to be pumped in the aquarium is 10 g

Explanation:

Here the value of the degree of solubility of oxygen in water is sought

The solubility of oxygen in fresh water is approximately 1.22 × 10⁻³ mol·dm⁻³ which is equivalent to approximately 40 mg/L

The volume of water the aquarium holds = 250 L

The mass of oxygen required = The solubility of oxygen in water × (The volume of water in the aquarium)

Therefore, the mass of oxygen needed to be pumped in the aquarium = 40 mg/L × 250 L = 10,000 mg

1,000 mg = 1 g

∴ 10,000 mg = 10 g

The mass of oxygen needed to be pumped in the aquarium = 10,000 mg = 10 g.

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<u>Answer:</u> The heat of hydrogenation of the reaction is coming out to be 234.2 kJ.

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For the given chemical reaction:

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Putting values in above equation, we get:

\Delta H_{rxn}=[(1\times (-2877.6))]-[(1\times (-2540.2))+(2\times (-285.8))]\\\\\Delta H_{rxn}=234.2J

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4 0
3 years ago
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Single displacement reaction is a type of reaction in which a more reactive metal displaces a less reactive metal from its chemical reaction.

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2 years ago
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Also, there are heat changes that accompanies most of these reactions. These are also indicators of chemical changes.

5 0
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