Hello!
If a reaction occurs when a piece of metal is placed in a solution, you can conclude that the solution is <span>probably acidic because bases rarely react with metals.
Strong Acids, like HCl, react with metals to produce salts and release gaseous hydrogen (H</span>₂) which is evidenced by the generation of bubbles in the solution. The general chemical equation for this kind of reactions for a metal M and an acid HA is:
2M(s) + 2HA(aq) → 2MA(aq) + H₂(g)
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The reactions based on the absorption and release of the energy are called endothermic and exothermic reactions. The reaction is exothermic.
<h3>What is an exothermic reaction?</h3>
Exothermic reactions are the reaction in which the reactant produces products that release energy from the system to the surroundings. In the reaction bond energy of the reactant is less than the product.
Energy from the system is released in the form of heat, sound, light and electricity. The weak bonds of the compounds are replaced with stronger ones and the standard enthalpy of the reaction is negative.
Therefore, option c. reaction is exothermic is correct.
Learn more about the exothermic reactions here:
brainly.com/question/26616927
Answer:
Yes
Explanation:
Because the higher radiation, people can get health problems and burns when exposed to high levels of heat.
![[H^{+}]= 10^{-pH} = 10^{-4.68}=2.09*10^{-5} [H^{+}] = 2.09*10^{-5}M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D%2010%5E%7B-pH%7D%20%3D%2010%5E%7B-4.68%7D%3D2.09%2A10%5E%7B-5%7D%0A%0A%5BH%5E%7B%2B%7D%5D%20%3D%202.09%2A10%5E%7B-5%7DM)