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A solution is made by dissolving 0.100 mole of NaCl in 8.60 mole of water.
a) What is the mole fraction of the solute?
b) What is the mass percent of the solute?
c) What is the molality of the solute?
A solution of 20.91 % by weight H2SO4 has a specific gravity of 1.150. What is the
normality of this solution? Water is added to dilute this solution to a solution of
3.03% by weight H2SO4 (SG= 1.020). What is the new normality of the resulting
solution and how were they mixed? (Assume 100 mL of the original solution was
used.)
Write a C++ program to input the radius of a circle from user and find diameter,
circumference and area of the given circle using function.
Use the following formula:
Diameter = 2r
Circumference = 2 π r
Area = π r2
Note: π = 3.14
Write a C++ program to input a number from user and check whether given number is even or odd using functions.
Write a function arraylist which receives an array of integer values. The list of elements are
the following:
20, 40, 60, 80
50, 90, 70, 10
30, 100, 200, 300
A random sample of 60 Grade 11 students’ ages is obtained to estimate the mean ages of all Grade 11 students. Suppose the sample mean is 17.3 and the population variance is 18,
What is the point estimate of the population parameter?
Find the 95% confidence interval for the population parameter?
Find the 99% confidence interval for the population parameter?
N=10 X= 82.5; s = 3. The parent population is normally distributed. Use the 95% confidence level to find the interval estimate for µ.
The number of inquiries received by a school on administration each day are recorded as: 40, 43, 49, 45, 46, 42, 43. Find the variance in the inquires per day
A researcher wanted to determine whether the average intelligence score for prisoners was different from the average intelligence score for the general population (μ = 100, σ = 15). Thirty-six prisoners on death row were administered an IQ test; the average IQ of the prisoners was 93. Use 0.05 significant level to test the null hypothesis.
Use the localized electron model to describe the bonding in hydrogenvcyanide and phosgene(COCl2)
For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give expected hybrid orbitals on the central atom, and predict the overall polarity.
a. OF2 b. AsF5 c. IF5
