Answer:
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Explanation:
English Translation
What is the relationship and the PROPORTIONS between Joules, lime, Cal, and Kcal?
Joules is the SI unit of Energy (heat energy).
Calorie, also called lime, is the amount of heat required to raise the temperature of 1 gram of pure water by 1°C or 1 K.
1 calorie = 4.186 J
A thousand calorie is equal to 1 kcal.
Hence,
1 kcal = 1000 calories = 4186 J
In Portugese/Em português
Joules é a unidade SI de energia (energia térmica).
Caloria, também chamada de cal, é a quantidade de calor necessária para elevar a temperatura de 1 grama de água pura em 1°C ou 1 K.
1 caloria = 4,186 J
Mil calorias é igual a 1 kcal.
Portanto,
1 kcal = 1000 calorias = 4186 J
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Espero que isto ajude
Answer:
pH = 2.462.
Explanation:
Hello there!
In this case, according to the reaction between nitrous acid and potassium hydroxide:
It is possible to compute the moles of each reactant given their concentrations and volumes:
Thus, the resulting moles of nitrous acid after the reaction are:
So the resulting concentration considering the final volume (20.00mL+13.27mL) is:
In such a way, we can write the ionization of this weak acid to obtain:
So we can set up its equilibrium expression to obtain x as the concentration of H3O+:
Next, by solving for the two roots of x, we get:
Whereas the correct value is 0.003451 M. Finally, we compute the resulting pH:
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Answer:
<h3>2 K2MnF6 + 4 SBF5 = 4 KSBF6 + 2 MnF3 + F2</h3>
<h2>Hope it helps...</h2>
Acetic acid is a weak acid and an organic compound and as such is not corrosive and therefore is acceptable to be used in food in the form of vinegar whereas hydrochloric acid is a strong mineral acid (partially derived from rock salt) and it is corrosive and from the author's experience it can be used in dilute form ie 10% by volume to react with limestone as a diagnostic test for that rock type (the limestone fizzes upon reaction with the dilute HCL.