Molarity of standard NaOH solution: x/1 H 2/3 Unknown + 2/3 NaOH -> 2/3 H2O +Na 2/3 Acetate
| Vinegar: | Titration 1 | Titration 2 | Tirtration 3 |
| Initial V of Acid | .01 mL | 5.56 mL | 11.32 mL |
| Final V of Acid | 5.56 mL | 10.71 mL | 16.02 mL |
| Inital V of Base | .01 mL | 27.12 mL | 3.01 mL |
| Final V of Base | 22.23 mL | 44.71 mL | 24.90 mL |
Unknown Acid code and number of reactive hydrogens: H+3
| Unknown Acid | Titration 1 | Titration 2 (Error) | Titration 3 | Titration 4 |
| Mass of Acid | .1024 g | .1028g | .1021g | .1023g |
| Initial V of Base | 24.90 mL | 37.80 mL | 45.5 mL | 9.24 mL |
| Final V of Base | 37.80 mL | 45.5 mL | 9.24 mL | 17.80 mL |
10. Find the moles of base (NaOH) for each of your unknown acid titrations.
11. Find the balanced equation using the number of reactive hydrogens (call an acid with one reactive hydrogen HA, one with two reactive hydrogens H2A, and so on).
12. Find the moles of unknown acid for each of your three unknown acid solutions.
13. Use the mass of unknown acid and the moles of unknown acid to find the formula mass of your unknown acid for each of your three unknown acid titrations.
In: Chemistry
This is all that was given.
Write a program in a PL of your choice to create the followings Output:
A table(7 rows), you see below, showing 35 names grouped in 7
lines.
The first column is the chosen Programming Language to develop and
present by the group.
PLs All group Names
C n26 n06 n28 n16 n30
C++ n31 n07 n33 n17 n35
C# n03 n08 n13 n18 n23
Python n04 n09 n14 n19 n24
java n05 n10 n15 n20 n25
JS n01 n27 n11 n29 n21
Ruby n02 n32 n12 n34 n22
Do you need more ? <0,1>1
PLs All group Names
C n01 n31 n11 n04 n21
C++ n02 n07 n12 n09 n22
C# n28 n33 n13 n14 n15
Python n16 n17 n18 n19 n20
java n30 n35 n23 n24 n25
JS n26 n27 n03 n29 n05
Ruby n06 n32 n08 n34 n10
Do you need more ? <0,1>0
- Names are unique, they should not be duplicated as this (nam7, name7), they can be real student names.
- The program should allow the user to rearrange the students
and the groups at will.
Example: select many students in one of several groups
:
if(( student_numbers %7) ==0 ) set student in group 1 (first group), and
if ((student_numbers %7) ==1 ) in group 2 (second group)
if ((student_numbers %7) ==2 ) in group 3 (third group)
if ((student_numbers %7) ==3 ) in group 4 (fourth group)
if (((student_numbers %7) ==4) in group 5 (fifth group)
if ((student_numbers %7 )==5) in group 6 (sixth group)
if ((student_numbers %7) ==6) in group 7 (seventh group)
Note: here % modulo function was used, but we can use other methods
of classification (formula, or function like).
Assignment: (Write a program in any PL and submit. (Required for grading))
------------------------------------------------------------------
Here is a pdf (repeated copy):
-------------------------------------
Write a program in a PL of your choice to create the followings
Output:
A table (7 rows), you see below, showing 35 names grouped in 7
lines.
The first column is the chosen Programming Language to develop and
present by the group.
- Names are unique, they should not be duplicated as this (nam7,
name7), they can be real
student names.
- The program should allow the user to rearrange the students and
the groups at will.
Example: select many students in one of several groups:
If (( student_numbers %7) ==0) set student in group 1 (first
group), and
if ((student_numbers %7) ==1) in group 2 (second group)
if ((student_numbers %7) ==2) in group 3 (third group)
if ((student_numbers %7) ==3) in group 4 (fourth group)
if (((student_numbers %7) ==4) in group 5 (fifth group)
if ((student_numbers %7) ==5) in group 6 (sixth group)
if ((student_numbers %7) ==6) in group 7 (seventh group)
Note: here % modulo function was used, but we can use other methods
of classification
(formula, or function like).
Assignment: (Write a program in any PL and submit. (Required for
grading))
Input: list of PLs, and list of student names (generate these at
random)
Output: the given Table (format) you see above
In: Computer Science
A study involving is conducted among the students on a college campus. the stress score follow a uniform distribution with the lowest stress score equal to one and the highest to five. using a sample of 75 students. Find the 95th percentile for the mean stress score for the 75 students.
In: Statistics and Probability
1. A random sample of 28 students at a particular university had a mean age of 22.4 years. If the standard deviation of ages for all university students is known to be 3.1 years,Find a 90% confidence interval for the mean of all students at that university. SHOW WORK
In: Statistics and Probability
A brewery wants to conduct a Marketing campaign. Therefore the marketing department is interested in the unknown Proportion of college students that buy beer. 425 customers were asked, and 351 of them where college students.
a) Calculate the 99% Confidence Interval for the unknown proportion of buyers that are college students
b) In order to conduct the campaign, the executive board demands, that more than 85% of the customers are college students. Test if this level is fulfilled up until Alpha=10%
In: Statistics and Probability
A national study found that college students spend an average of 150 ( = 150) studying during their first semester. A group of 41 AAMU students participated in The AAMU summer bridge students studied an average of 146 hours (M = 146) during their first semester. With a sum of squared deviations of 2,367 (SS – 2,367) and a significance level of α = .01, did the summer bridge students differ in the number of hours studied compared to college freshmen nationally?
In: Statistics and Probability
The principal of a large high school wants to estimate the proportion of students who skip more than 10 days of school in a year.
A random sample of 100 students from a population of 1800 showed that 8 students skipped more than 10 days of school last year.
The upper limit (to four decimal places) of a 95% confidence interval for the proportion of students who skip more than 10 days of school in a year is
In: Statistics and Probability
Test the claim that the mean GPA of night students is larger than the mean GPA of day students at the .025 significance level.
The null and alternative hypothesis
H0:μN=μD
H1:μN>μD
The Test is Right Tailed
The sample consisted of 30 night students, with a sample mean
GPA of 3.23 and a standard deviation of 0.02, and 60 day students,
with a sample mean GPA of 3.19 and a standard deviation of
0.06.
The test statistic is:
The critical value is:
In: Statistics and Probability
A sample of 300 students of undergraduate and 300 students of postgraduate classes of a university were asked to give their opinion towards autonomous colleges. 190 of the undergraduate and 210 of the postgraduate students favoured the autonomous status.
i) At 5% significance level, would it be said that the opinions of the undergraduate and postgraduate students on autonomous colleges are independent? {The critical value of the requisite test statistic is 3.84} (
ii) What is the implication / interpretation of your results in 3) i) above?
In: Statistics and Probability
An instructor at a major research university occasionally teaches summer session and notices that that there are often students repeating the class. Out of curiosity, she designs a random sample of students enrolled in summer sessions and counts the number repeating a class. She counts 105 students in the sample, of which 19 are repeating the class. The university enrolls 15,000 students.
A 95% confidence interval is given by:
(0.09, 0.272).
(0.107, 0.255).
(0.15, 0.23).
(0.345, 0.453).
In: Statistics and Probability