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vredina [299]
3 years ago
8

A substance is a base if it has a pH value greater than___PLEASE ANSWER ASAP ​

Chemistry
1 answer:
WINSTONCH [101]3 years ago
8 0

Answer:

A substance is basic or alkaline if it's pH is greater than 7.0.

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jek_recluse [69]

Answer:

Oxygen will dissolve more in H2O at 5 atm and 20 °C than at 5 atm 80 °C

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Explanation:

Step 1: Data given

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Step 2:

At low pressure, a gas has a low solubility. Decreased pressure allows more gas molecules to be present in the air, with very little being dissolved in solution.  At high(er) pressure, a gas has a high solubility.

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For the reaction 3h2(g) + n2(g) 2nh3(g), kc = 9.0 at 350°c. calculate g° at 350°c.
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When ΔG° is the change in Gibbs free energy

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So by substitution in ΔG° formula:

∴ ΔG° = - 8.314 1/ mol.K * 623 K *㏑(9)

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