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6. How many moles of sucrose πΆ12π»22π11, are contained in 50.0g of a 0.85 m sucrose solution?
7. What volume of 0.25 M NaOH contains 0.050 mol NaOH?
8. What mass of sodium phosphate is dissolved in 255g of a solution that is 20.0% by mass ππ3ππ4?
9. A 375.0g sample of river water taken near an industrial plant contains 37mg of chromium.
a. What is the mass percent of chromium in the river?
b. How many parts per million of chromium are in the river?
c. How many parts per billion?
10. If a solution of π΄πππ3 is added to an HCl solution, insoluble AgCl will precipitate:
π΄πππ3 (ππ) + π»πΆπ(ππ) β π΄ππΆπ(π ) + π»ππ3(ππ)
What volume of a 1.20 M π΄πππ3 solution must be added to 250.0 mL of a 0.100 M HCl solution to precipitate all the chlorine ion?
1. Consider a solution prepared by adding 2.70 g of acetic acid(πΆπ»3πΆπ2π»), to 122.8 g of water.
a. What is the percent by mass concentration of acetic acid in this solution?
b. What mass of acetic acid is present in 25.0g of this solution?
2. To prepare a solution, we dissolve 205 mL of ethanol in sufficient water to give a total volume of 235mL. What is the percent-by-volume concentration of ethanol?
3. What is the concentration in ppm of selenium if 0.020g is found in 5.0 Γ 103ππ of soil?
4. A solution contains 117g of potassium hydroxide (KOH), dissolved in sufficient water to give a total volume of 2.00 L. The molar mass of KOH is 56.11 π/πππ . What is the molarity of the aqueous potassium hydroxide solution?
5. A solution contains 22.5g of methanol(πΆπ»3ππ»), dissolved in sufficient water to give a total mass of 105.3g. The molar mass of πΆπ»3ππ» is 32. π/πππ . What is the molality of the aqueous methanol solution?
1. When a solution of lead(II) nitrate is mixed with a solution of potassium chromate, a yellow precipitate forms according to the equation.
ππ(ππ3 )2 (ππ) + πΎ2πΆππ4 (ππ) β πππΆππ4 (π ) + 2πΎππ3
(a)What volume of 0.105 M lead (II) nitrate is required to react with 100 mL of 0.120 M potassium chromate
(b)What mass of πππΆππ4 solid forms?
2. Suppose a titration is run in which 25.05 mL of NaOH solution of unknown concentration reacts with 25.00 mL of 0.1000 M π»2ππ4 solution. The chemical equation that summarizes the reaction is as follows:
π»2ππ4 (ππ) + 2ππππ»(ππ) β 2π»2π(π) + ππ2ππ4(ππ)
What is the molarity of the solution?
3. If a solution of π΄πππ3 is added to an HCl solution, insoluble AgCl will precipitate:
π΄πππ3 (ππ) + π»πΆπ(ππ) β π΄ππΆπ(π ) + π»ππ3(ππ)
(a)What volume of 1.20 M π΄πππ3 solution must be added to 250.0 mL of a 0.100 M HCl solution to precipitate all the chloride ion?
(b)What mass of AgCl should precipitate?
3+x2 =-3
Solve the homogeneous differential equation π₯π¦ ππ¦/ππ₯ = π¦2 + π₯2 πy/ππ₯Β Β Β .
Β Β Β Β Β Β Β Β Β Β Β Β Β
Make a file by yourself named βInteger.txtβ and add 5 integer values in it. Now, write a C++
program that reads data (5 integers) from the file and store them in integer array. Also make another
integer array (int result []) of same size to store the results. The program should check for each number
in array if it is prime number or not. If the number is prime, update value in result[] array from 0 to 1.
Lastly, write output in another file named βResult.txtβ
Example
Input:
Integer.txt
2 11 1 17 8
Output:
Result.txt
1 1 0 1 0
Hint: Prime number are those which is only divisible by 1 or itself.
Find the differential equation whose solution is π¦ = π΄π₯ + π΅π₯2.
Find the inverse of the given function. Upload solution in next number.
Let f:RβR , f(x)= 4x + 3
a. f-1Β (y)=Β
b. f-1Β (35) =Β
c. f-1Β (-9) =Β
Task 2
Write a program which takes 3 studentsβ data from file (βinput.txtβ) and displays the grade
obtained by student in new file (βoutput.txtβ).
Hint: The program will read name from the file and then the marks obtained in three subjects.
Add those marks and convert them out of 100 and display the grade obtained by student.
Repeat these steps for three students
Score (out of
100)
Grade
0 β 49.5
F
49.5 β 57.5
D
57.5 β 71.5
C
71.5 β 84.5
B
>= 84.5
A
Task 2
Write a program which takes 3 studentsβ data from file (βinput.txtβ) and displays the grade
obtained by student in new file (βoutput.txtβ).
Hint: The program will read name from the file and then the marks obtained in three subjects.
Add those marks and convert them out of 100 and display the grade obtained by student.
Repeat these steps for three students
Score (out of
100)
Grade
0 β 49.5
F
49.5 β 57.5
D
57.5 β 71.5
C
71.5 β 84.5
B
>= 84.5
A
