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According to one of the teachers in your school, the senior high school students sleep for 7 hours a day on a weekday. You wanted to prove this claim by making a survey of 50 senior high school students. You will be asking the students about how long they sleep in a regular weekday. Record the results of your survey. As a researcher, you need to compute the mean and standard deviation of your sample.
Create a 90%, 95%, and 99% confidence interval for the mean time of sleep for senior high school students. In your report, the raw data should be present, and the computation should be complete
If a population has a variance of 6.4, what is the variance of the sampling distribution of it's means? The sampling distribution has a sample size of 2 and all possible samples are drawn with replacement
What is the net ATP count if 1 mol of glucose is completely oxidized? Show computation and all the reducing equivalents.
2.83 g of a sample of haematite iron ore [iron (III) oxide, Fe2O3] were dissolved in concentrated hydrochloric acid and the solution diluted to 250 cm3. 25.0 cm3 of this solution was reduced with tin(II) chloride (which is oxidised to Sn4+ in the process) to form a solution of iron(II) ions. This solution of iron(II) ions required 26.4 cm3 of a 0.0200 mol/dm3 potassium dichromate(VI) solution for complete oxidation back to iron(III) ions.
(a) given the half–cell reactions
(i) Sn4+(aq) + 2e– ==> Sn2+(aq)
and (ii) Cr2O72–(aq) + 14H+(aq) + 6e– ==> 2Cr3+(aq) + 7H2O(l)
deduce the fully balanced redox equations for the reactions
(i) the reduction of iron(III) ions by tin(II) ions
(ii) the oxidation of iron(II) ions by the dichromate(VI) ion
(b) Calculate the percentage of iron(III) oxide in the ore.
Write a program to overload operators in the same program by writing suitable operator member functions for following expression:
07= ((01 % 02)>(03 || 04) - (05>06)) [Here 01,02,03,04,05,06 and 07 are objects of a class "overloading", and this class is having one integer data member]
When incomplete fuel combustion happens in automobiles, it produces carbon monoxide. How does catalysis work in getting rid of this toxic gas?
_________ is used in expressing the rate law.
a. activation energy
b. reactant concentration
c. collision theory
d. reaction time
Write a program to take input for n number of doctor records and write records of all cardiologists in
a file named: “record1”. Also write records of all those doctors in another file named: “record2” who are
taking salary more than INR 80,000. After writing records in both files, merge their contents in another
file: “finalrecord” and read all records of “finalrecord” file and display on screen. [Attributes of doctor:
doc_id, doc_name, doc_specialization, doc_salary]
A catalyst ______ the rate of chemical reaction without being consumed.
a. determines
b. equalizes
c. decreases
d. increases
___________ uses a catalyst that is of similar phase of the reactants and products.
a. homogeneous catalysis
b. catalytic reaction
c. heterogeneous catalysis
d. reactant concentration
Rate law reflects ___________.
a. Arrhenius equation and Integrated law
b. reaction time and reactant concentration
c. molecularity and order of reaction
d. activation energy and collision theory
Chemical kinetics is the study of ____________.
a. collision theory
b. molecularity
c. reaction rates
d. reactant concentration
#339914 on Dec 2023