What quantity of 72% acetic acid solution must be mixed with a 16% acetic acid solution to produce 141.78 ml of 63% solution?

The quantity of 72% of acetic acid is 123.83 ml

Step-by-step explanation:

Given as :

The produce quantity after mixing = 141.78 ml of 63%

Let The quantity of 72% of acetic acid = x ml

72% of acetic acid mix with 16% acetic acid

Now, According to question

72% of acetic acid × quantity of 72% of acetic acid + 16% acetic acid = The produce quantity after mixing

Or, × x ml + = 141.78 ml ×

Or, 72 x + 16 = 8932.14

Or, 72 x = 8932.14 - 16

Or, 72 x = 8916.14

∴  x =

i.e x = 123.83 ml

So, The quantity of 72% of acetic acid = x = 123.83 ml

Hence, The quantity of 72% of acetic acid is 123.83 ml  Answer

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;