oxygen is a common oxidizing agent in nature. what change in the oxidation number of oxygen must occur if it is to be an oxidizi
1 answer:
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Answer:
26.67 mol HCl
Explanation:
Al(OH)₃ + 3HCl → AlCl₃ + 3H₂O
In order to solve this problem, we need to c<u>onvert Al(OH)₃ moles to HCl moles</u>.
To do so we use the<em> stoichiometric ratios</em> of the balanced reaction:
- 8.89 mol Al(OH)₃ *
= 26.67 mol HCl
Thus 26.67 moles of HCl would react completely with 8.89 moles of Al(OH)₃.
<u>Answer:</u> The smallest temperature change is shown by water.
<u>Explanation:</u>
To calculate the heat absorbed or released, we use the equation:
......(1)
where,
q = heat absorbed = 200.0 J
m = mass of the substance
C = specific heat of substance
= change in temperature
As, the same amount of heat is getting absorbed in all the cases. So, the change in temperature will depend on the product of mass and specific heat.
For the given options:
- <u>Option a:</u> 50.0 g Fe,
We are given:
Putting values in equation 1, we get:
Change in temperature = 8.99°C
- <u>Option b:</u> 50.0 g water,
We are given:
Putting values in equation 1, we get:
Change in temperature = 0.96°C
- <u>Option b:</u> 25.0 g Pb,
We are given:
Putting values in equation 1, we get:
Change in temperature = 62.5°C
- <u>Option d:</u> 25.0 g Ag,
We are given:
Putting values in equation 1, we get:
Change in temperature = 34.04°C
- <u>Option e:</u> 25.0 g granite,
We are given:
Putting values in equation 1, we get:
Change in temperature = 10.13°C
Hence, the smallest temperature change is shown by water.