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Write a balanced chemical equation of the decomposition of glucose.
1. The results of a particular examination are shown below in summary form:
Result
Percentage of candidates
Passed with distinction
15
Passed without distinction
42
Failed
43
Total
100
It is known that a candidate gets failed if he obtains less than 40 marks (out of 100), while he must obtain at least 75 marks in order to pass with distinction. Hence determine the mean and standard deviation of the distribution of the marks, assuming it is of normal type.
A quality control want to estimate the proportion of high quality goods out of a batch of products with a 90% confidence level and a margin of error of 5%. How may products must he tes
Dinitrogen pentaoxide, N₂O5, decomposes to nitrogen dioxide, NO2 and oxygen, O₂ as shown in the reaction below: 2N₂O5(g) →→→ 4NO2(g) + O₂(g) Initial rate decomposition data at 25° C for the decomposition give the following data: Concentration of N₂O5, M Initial rate, mol/L-min 0.250 5.70 x 10-4 0.350 7.98 x 10-4 0.450 1.03 x 10-3 Calculate the rate constant at 25°C ? min-¹ What is the half-life for the reaction at 25°C ? min How long will it take to decompose 40.0% of N₂O5 at 25°C ? min At 40°C, the rate constant for the decomposition is 1.58 x 10-2 min¹. What is the activation energy for this reaction? kJ/mol
If a regtangular prism has dimensions 144cm by 52cm by 48cm what will the volume of the prism be in cm³
1. The average time spent of STEM students in answering their module is 5 hours daily. Illustrate the null and alternative hypotheses. Express your answer in symbols.
2. Mrs. Serrano the canteen manager in PSNHS claims that the average capacity of their bottled water is 350ml. Identify the null and alternative hypotheses if the HUMSS students calculated the capacity of each bottle and found out the contents to be 340ml from a sample of 50 bottled water. Write your answer in symbols.
3. The average age of teachers in PSNHS is 36. The mean age of 26 sample SHS teachers is 35 with a standard deviation of 3 years. Illustrate the table Ho - Ha, below to illustrate hypotheses.
4. The average net pay of PSNHS personnel is Php 10,000. Identify the parameter and its exact value to be tested.
I need answers for all these questions please help me
The mean spent time by each teacher in online classes is 60 minutes.Determine the parameter to be tested and its exact value.
What is the expression for Kc for this reaction?
[1] Kc= [Cl2] 2 / [TiCl4]
[2] Kc= [TiCl4] / [Ti][Cl2] 2
[3] Kc= 1 / [Cl2] 2
[4] Kc= [TiCl4] / [Cl2]
[5] All of the above.
How many moles of gas are there in a sample occupying 1.74 L at 0.136 atm and 25°C? [1] 0.00968 mol
[2] 0.0463 mol
[3] 0.0926 mol
[4] 7.36 mol
[5] None of the above
What is the density of CO2 at 25°C and 750 Torr?
[1] 0.472 g/L [2] 1.78 g/L
[3] 1.82 g/L
[4] 2.12 g/L
[5] None of the above
#340153 on Dec 2023