One of the best buffer choice for pH = 8.0 is Tris with Ka value of 6.3 x 10^-9.
To support this answer, we first calculate for the pKa value as the negative logarithm of the Ka value:
pKa = -log Ka
For Tris, which is an abbreviation for 2-Amino-2-hydroxymethyl-propane-1,3 -diol and has a Ka value of 6.3 x 10^-9, the pKa is
pKa = -log Ka
= -log (6.3x10^-9)
= 8.2
We know that buffers work best when pH is equal to pKa:
pKa = 8.2 = pH
Therefore Tris would be a best buffer at pH = 8.0.
If you know how to convert grams to moles, do that first. Then, use a b delta a table to find x. Then add 2x to 2Fe2O3 to get .08953 moles. Not shown in pic, that amount in grams is 14.2967
Answer:
gold is metal which is a very good conductor for electric current and most chips are made out of it.
<u>Answer:
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Reaction C
<u>Explanation:
</u>
For reaction A) we have the production of alcohol by the action of the water that attacks the tertiary carbocation produced by the leaving of Br. In the last step we will have the proton transfer (figure 1).
For B) the proton transfer step is given in the double bond formation due to the attack of the hydroxle group (figure 2).
In C we have an Sn2 reaction. Therefore, the reaction takes place in only one step without the opportunity of a proton transfer step (figure 3).
Finally for D we have an elimination reaction in which the tert-butoxide molecule will remove hydrogen (proton transfer step) from the carbocation to produce an alkene (figure 4).
Answer:
= 3.456 × 1011
(scientific notation)
= 3.456e11
(scientific e notation)
= 345.6 × 109
(engineering notation)
(billion; prefix giga- (G))
= 345600000000
(real number)
Explanation:
i dont know if its math or something else so here are your answers:)