Answer:

Explanation:
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In this case, according to this equilibrium temperature problem, we can set up the following equation to relate the mass, specific heat and temperature change:

Thus, we solve for the mass of cobalt as shown below:

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Answer:
Zn+2HCl→ZnCl2+H2
Explanation:
Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc.
pH is the potential of the hydrogen in the aqueous solution. The pH of the hydrosulfuric acid is 0.6.
<h3>What is pH?</h3>
pH is the hydrogen or the hydronium ion concentration in the aqueous solution. The formula to calculate pH is given as,
![\rm pH = \rm - log [H^{+}]](https://tex.z-dn.net/?f=%5Crm%20pH%20%3D%20%5Crm%20-%20log%20%5BH%5E%7B%2B%7D%5D)
Since hydrosulfuric acid is diprotic the concentration of the hydrogen ion will be:
![\begin{aligned} \rm [H^{+}] &= 2 \times 0. 571 \;\rm M \\\\&= 1.142\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%20%5Crm%20%5BH%5E%7B%2B%7D%5D%20%26%3D%202%20%5Ctimes%200.%20571%20%5C%3B%5Crm%20M%20%5C%5C%5C%5C%26%3D%201.142%5Cend%7Baligned%7D)
Now, pH is calculated as:
![\begin{aligned} \rm pH &= \rm - log [H^{+}]\\\\&= \rm - log [1.142]\\\\&= 0.06\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%20%5Crm%20pH%20%26%3D%20%5Crm%20-%20log%20%5BH%5E%7B%2B%7D%5D%5C%5C%5C%5C%26%3D%20%5Crm%20-%20log%20%5B1.142%5D%5C%5C%5C%5C%26%3D%200.06%5Cend%7Baligned%7D)
Therefore, 0.6 is the pH of the hydrosulfuric acid solution.
Learn more about pH here:
brainly.com/question/1459153
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