Answer:
2 significant figure is 13.1 aluminium
<span>∆S= (entropy of products) - (entropy of reactants)</span><span>
</span>∆S = +138 J/K
<span><span>NaOH + HCl --> NaCl + H2Oso here 1 mole of NaOH reacts with 1 mole of HCl. Hence it is required to convert the amount of HCl and NaOH in to moles.Number of HCl moles Concentration of the solution = 2.00M = 2 mol/ literVolume of the solution = 22.4 mlNumber of HCl moles = (2mol/1000 ml)*22.4 ml = 0.0448 mol</span></span>
The dilution of hydrogen peroxide that would not be considered an effective disinfectant is any solution with a Hydrogen peroxide concentration that is lower to 3%.
<h3>What is hydrogen peroxide?</h3>
Hydrogen peroxide is one of the most common antiseptics. This means it is a substance used as a disinfectant either on surfaces or in small wounds, although its use on wounds is discouraged.
<h3>What concentration works as a disinfectant?</h3>
In most cases, hydrogen peroxide is not found as a pure substance but as a dilution, which means hydrogen peroxide is mixed with other substances such as water to decrease its concentration.
The ideal concentration of hydrogen peroxide is 3%, this concentration makes it an effective disinfectant. In the same way, a lower concentration would not have effectiveness in terms of disinfection.
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