Na has a +1 charge, and O has a -1 charge.
The mass of oxygen and hydrogen must be equal to the mass of the substance they create the water. So if the hydrogen is 2.8 g the oxygen must account for the rest of the mass. Basically just subtract 25.4-2.8=mass of oxygen
Answer:
it's the uneven heating of the region's of the troposphere by the sun the sun warms the air at the equator more than the air at the poles. it causes convention currents large scale patterns of winds that move heat and moisture around the globe. as air rises expands and cools water vapor condenses and clouds develop.
Explanation:
I hope this helps :)
Answer:
air
Explanation:
air becuae aang is the avatar
Answer:
(a) MOPS
(b) MES
Explanation:
Buffers are solutions whose function is to resist drastic changes in pH when an <em>acid</em> or a <em>base</em> is added. They are formed by 2 components:
- A weak acid and its conjugate base (e.g., HF/F⁻). <u>(acid buffer)</u>
- A weak base and its conjugate acid (e.g., NH₃/NH₄⁺). <u>(basic buffer)</u>
pH and be pOH can be calculated, in each case, according to Henderson-Hasselbalch equations:
pH = pKa + log ([conjugate base]/[weak acid]) <u>(acid buffer)</u>
pOH = pKb + log ([conjugate acid]/[weak base]) <u>(basic buffer)</u>
It is possible to see that when the concentration of acid is equal to that of its base, pH = pKa or pOH = pKb. This is the point where the buffer has its optimum performance. Nevertheless, it has its most effective range of work (buffer range) when the ratio acid:base is between 0.1 and 10. If we take these values into Henderson-Hasselbalch equations, we can see that the optimum range of work is:
- For acid buffer, pH = pKa ± 1
- For basic buffer, pOH = pKb ± 1
In (a) (pH = 7.0), the solution is closet to the pK of the MOPS buffer, so this would be the best choice. Nevertheless, both MES and HEPPS would be suitable options, because their buffer ranges comprise pH = 7.0.
In (b) (pH = 6.0), the solution is closest to the pK of the MES buffer, so this would be the best option. Other buffers are not suitable because pH = 6.0 is out of their buffer range.
