(4xC-Cl bond + 2xF-F bond) - (4xC-F bond + 2xCl-Cl bond)
<span>ΔH°rxn=(4x331 + 2x155) - (4x439 + 2x243) = -608kJ/mol-1
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Remember one thing controlled variables is something. In an experiment that you like and you want to remain the same in order for the science experiment to be good
Explanation:
The pH of a substance can be found by using the formula
where [ H+ ] is the hydrogen ion concentration in the substance
From the question
[ H+ ] = 2.1 × 10-¹² M
To find the pH substitute the value into the above formula
We have
We have the answer as
<h2>pH = 11.7 </h2>
The solution is basic since it lies in the basic region that is from 8 to 14
Hope this helps you
10 grams of gold would have a specific heat of 0.31 calories ie 10 x 0.031 and if heated up by 20.0 degrees centigrade then 20.0 x 0.31 would be a 6.2 calorie increase in heat. In other words, the specific heat means that it is the calories produced in the gram of gold by a 1 degree rise in degrees centigrade.
Answer:
they are produced by the body in response to the presence of foreign substance