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What will be the freezing point of an aqueous solution containing 80 g of NaCl?
Show Its Given, Required, Equation, Solution, Answer
Construct a class named student consisting of a student identification number, list of five grades, and an integer representing the total value of grades entered. The constructor for this class should initialize all student data members to zero. Included in the class the functions/ methods for:
1. Constructor and a Destructor.
2. Create an assessor method to enter a student number
3. Create a method to enter a single test grade (used loop for entering 5 grades)
4. Create a mutator method – to computer an average grade
5. Create a method to display the student number and average grade.
It is known from the records of the city schools that the standard deviation of mathematics test score on the XYZ test is 5. A sample of 200 pupils were taken and it was found that the sample mean score is 75. Previous tests showed the population mean to be 70. Is it safe to conclude that the sample is significantly different from the population at 5% significance level?
class Student:
# Constructor
def _init_(self):
self.id_number = 0
self.grades_list = []
self.grades_total = 0
What type of intermolecular force will act in the following substance? Justify your answer.
a. Sulfur Dioxide (SO2)
b. Nitrogen gas (N2)
c. Hydrogen fluoride
The reaction of water with alkene to produce an alcohol is a/an ______ reaction.
Given a string on one line, output the length of that string. End with a newline.
Ex: If the input is:
Fuzzy bear
the output is: 10
Appliance and TV
by CodeChum Admin
Create a class called Appliance. An appliance simply has a:
- brand (a text)
- a cost (a monetary value)
- a power status (ON or OFF)
Power status, brand and cost should not be accessible out the class or its hierarchy of inheritance
changing the position of the OH Functional group changes the enthalpy of combustion. so primary secondary and tertiary have different enthalpies of combustion. However, I don't understand why!
primary alcohols have a higher enthalpy of combustion, then secondary then tertiary.
for example
(butan-1-ol): -2670 kj/mol
(butan-2-ol): -2660.6
(2-methylpropan-2-ol): -2644.0
I know that: primary alcohols only have 1 alkyl group secondary has 2, tertiary 3. the alkyl groups provide stability due to I effect. Also tertiary is protected from oxidization as its carbon has no hydrogen to donate. Also, less branching means molecules can pack closer together and experience stronger hydrogen bonds.
However, the enthalpy of combustion is unaffected by intermolecular forces, right? it has to do with intramolecular forces within the molecule.
Is it to do with the branching? do intermolecular forces actually affect the enthalpy of combustion? surely not when combusted as a gas like in a combustion chamber.
For a certain gas, R = 0.277 kJ/kg-K and k = 1.384. a) What are the value of cp
and cv? b) What mass of this gas will occupy a volume of 0.425 m3 at 517.11
kPaa and 26.7 0C? c) If 31.65 kJ are transferred to this gas at constant
volume, what are the resulting temperature and pressure?
