Answer:
true
Explanation:
POPs bio-magnify throughout the food chain and bio-accumulate in organisms.
Answer:
Explanation:
Considering the Henderson- Hasselbalch equation for the calculation of the pH of the buffer solution as:
Where Ka is the dissociation constant of the acid.
pKa of phenolphthalein = 9.40
pH = 10.9
So,
Answer: when its in the air
Explanation:
please brainliest me
1- We have to get the molar mass of calcium bromide, by getting the chemical formula ( CaBr2).
From the chemical formula, we have to get the molecular weight for each of Ca&Br on the periodic table:
Ca = 40.078 & Br = 79.904
* from the chemical formula ( CaBr2) so, the molecular weight of calcium bromide is:
40.078 + 2x(79.904) = 199.89
2- number of moles = weight / molecular weight
=20.275 / 199.89 = 0.1014 moles
3- where the volume of solution by littre = 575 mL/ 1000 = 0.575 L
So,
4-Molarity = moles of solute / L of solution
= 0.1014 / 0.575 = 0.1763 mol/L
Answer:
Explanation:
Hello,
In this case, the transferred heat to the mixture is given by the addition among each compound's specific enthalpies:
Now, each specific enthalpy is given by the following equation:
As long as there is a large difference between the initial and the final temperature. In such a way, the shown below polynomial for the Cp which is given kJ/kmol*K is considered and subsequently integrated:
Now, the specific enthalpy is computed for each component considering the temperatures in Kelvin:
Now, we convert them per unit of mass as:
Finally, by considering the volumetric percentages, we compute the heat transferred to mixture:
Best regards.