Answer:
yes, A double replacement reaction has two compounds as reactants.
hence it's true.......
Answer: I believe the answer is A. The order of amino acids in the protein.
Explanation:
Answer:
(S)-3-methoxy-3-methylbutan-2-ol
Explanation:
In this case, we have an <u>epoxide opening in acid medium</u>. The first step then is the <u>protonation of the oxygen</u>. Then the epoxide is broken to generate the most <u>stable carbocation</u>. The nucleophile (
) will attack the carbocation generating a new bond. Finally, the oxygen is <u>deprotonated</u> to obtain an ether functional group and we will obtain the molecule <u>(S)-3-methoxy-3-methylbutan-2-ol</u>.
See figure 1
I hope it helps!
Um try B? i think that would be correct. either B or C
Answer : The initial mass of the sample is, 31.9 mg
Explanation :
Half-life = 4 days
First we have to calculate the rate constant, we use the formula :



Now we have to calculate the initial mass of sample.
Expression for rate law for first order kinetics is given by:

where,
k = rate constant = 
t = time passed by the sample = 12 days
a = initial amount of the reactant = ?
a - x = amount left after decay process = 4 mg
Now put all the given values in above equation, we get


Therefore, the initial mass of the sample is, 31.9 mg