2 Corsls provide treatments
<u>Answer:</u> The formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:

Given mass of oxygen gas = 83 g
Molar mass of oxygen gas = 32 g/mol
Putting values in above equation, we get:

For the given chemical equation:

<u>Sign convention of heat:</u>
When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.
By Stoichiometry of the reaction:
When 3 moles of oxygen gas is formed, the amount of heat absorbed is 824.2 kJ
So, when 2.594 moles of oxygen gas is formed, the amount of heat absorbed will be = 
Hence, the formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.
Answer:
deep blue solution of tetramminecopper [Cu(NH3)4]2+ complex ion.
Explanation:
Answer:
3. NaNO3
Explanation:
Below the line on TABLE G in the reference tables at 40C
E should be correct.
The color may change, precipitation may occur, bubbles may form, gas forms, and the temperature changes.
Mark if correct please!