QUESTION 5
1 answer:
<h2>Answer:</h2>
The weak acid <u>D) acetic acid</u>.
<h2>Explanation:</h2>Acid are the substance which has pH below 7 and releases ions when they are treated with aqueous solution. Based upon the rate of dissociation, the acids are classified as strong acids which has high dissociation rate and weak acid with low dissociation rate.
Acetic acid is a organic acid with the formula . It is a colorless acid and also named as ethonoic acid.
Among the given list of acid in the option which includes, Sulfuric acid, Nitric acid, Hydrochloric acid, and Acetic acid, first three are strong acids, whereas the lastly mentioned is a weaker one.
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Answer:
The answer is 83.38%.
Explanation:
The probability of young children having blood levels that impair their neurological development is given as 60% in the question. To find the probability of at least 5 children out of 10 in a sample having said blood levels, we need to use the binomial probability.
n represents the total number of children in the sample so n = 10 and p is the probability of the children having blood levels causing the problem which is 60% so p = 0.6.
We want the probability of it being observed for 5 or more children and that is . If we subtract the
from 1, which is the probability of not observing the condition in 5 or more children, we will have the
.
which are the probability range in the function, the sample size and the probability of observing the condition respectively.
The result is 1 - 0.1662 = 0.8338 which means that the probability that is asked is 83.38%.
I hope this answer helps.