This problem is providing us with two reactions between gold (III) chloride and cobalt in order to obtain the two possible cobalt chlorides and gold. Thus, it asks for the most feasible reaction, which is found to be the second one.
<h3>Uses of stoichiometry</h3>
In chemistry, relationships between moles and grams in chemical reactions can be studied via stoichiometry, which is based on proportional factors relating molar masses and mole ratios in chemical equations.
In this case, since we have two reactions and the same initial amount of cobalt, one can calculate the grams of solid gold, with the 1:1 mole ratio of these two in the first reaction and the 3:2 mole ratio in the second one and their atomic masses of 58.933 g/mol and 196.966 g/mol respectively:
![6.087gCo*\frac{1molCo}{58.933gCo}*\frac{1molAu}{1molCo} *\frac{196.966gAu}{1molAu}=20.34gAu\\ \\6.087gCo*\frac{1molCo}{58.933gCo}*\frac{2molAu}{3molCo} *\frac{196.966gAu}{1molAu}=13.56gAu](https://tex.z-dn.net/?f=6.087gCo%2A%5Cfrac%7B1molCo%7D%7B58.933gCo%7D%2A%5Cfrac%7B1molAu%7D%7B1molCo%7D%20%20%2A%5Cfrac%7B196.966gAu%7D%7B1molAu%7D%3D20.34gAu%5C%5C%20%5C%5C6.087gCo%2A%5Cfrac%7B1molCo%7D%7B58.933gCo%7D%2A%5Cfrac%7B2molAu%7D%7B3molCo%7D%20%20%2A%5Cfrac%7B196.966gAu%7D%7B1molAu%7D%3D13.56gAu)
Thus, since the second reaction would produce 13.56 grams of gold, and it is pretty much the same to the recovered amount of 13.572 grams, one concludes the second reaction took place in the experiment.
Learn more about stoichiometry: brainly.com/question/9743981
Answer:
Some are storm surge and storm tides, flooding and heavy rainfall
26.7% is the percent composition by mass of sulfur in a compound named magnesium sulfate. Explanation: Molar mass of compound = 120 g/mol.
Answer:
The lower the hydrogen ion concentration, the higher the pH.
Step-by-step explanation:
This effect comes from the definition of pH:
pH = -log[H₃O⁺]
Consider two solutions.
Solution A has [H₃O⁺] = 10⁻¹ mol·L⁻¹; Solution B has [H₃O⁺] = 10⁻¹⁰ mol·L⁻¹.
Solution B has the <em>lower [H₃O⁺]</em>.
Now, take the logarithm of each concentration.
Solution A: log[H₃O⁺] = log10⁻¹ = -1; Solution B: log[H₃O⁺] = log10⁻¹⁰ = -10
Solution B still has the <em>lower value</em>.
However, pH is the <em>negative</em> logarithm.
When we take negative logarithms, we get
Solution A: pH = 1; Solution B: pH = 10
Solution B has the lower [H₃O⁺], but the higher pH.
The lower the hydrogen ion concentration, the higher the pH.
Answer:
enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes.
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