During the lab, you measured the pH of common household items. Write net Brønsted equations that show the acidic or basic nature
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Hydroboration-oxidation is a reaction which follow anti markonikov orientation.
The stereochemistry of hydroboration-oxidation follows syn-adition being a stereospecific reaction. That means that boron and hydrogen are added from the same side. Then, when the oxidation occurs, the boron is replaced by an hydroxyl having the same geometric position.
Answer: A) 0.0480 grams and B) 56.16 years.
Explanation: Half live is the time in which the amount of radioactive substance remains halve of its initial amount.
The formula we use for solving this type of problem is:
where, is the initial amount and N is the remaining amount of radioactive substance and n is the number of half lives.
where, T is the time and is half life.
A) from given data, = 2 g
T = 70 years
= 13 years
N= ?
n = 5.38
N = 0.0480 g
So, 0.0480 grams of the substance will be remaining after 70 years.
B) = 2 g
N = 0.1 g
T = ?
Let's first calculate the value of n for this.
Taking log to both sides:
n = 4.32
Half life is 13 years, so we can calculate the time as:
T = 56.16 years
So, it will take 56.16 years for the radioactive substance to decay from 2 g to 0.1 g.