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For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give expected hybrid orbitals on the central atom, and predict the overall polarity.
a. OF2 b. AsF5 c. IF5
A fruit juice franchise company has a policy of opening new fruit juice stand only on those areas that have a mean household income of at least ₱30,500 a month. The company is currently considering an area in which to open a new fruit juice stand. The company’s research department took a sample of 25 households from this area and found that the mean monthly income of these households is ₱32,600. Using 5% significance level, would you conclude that the company should open a fruit juice stand in the area? Also, find the 95% confidence interval of the true mean.
The treasurer of a municipality claims that the average net worth of families living in this municipality is ₱590,000. A random sample of 50 families selected from this area produced a mean net worth of ₱720,000 with standard deviation of ₱65,000. Using 1% significance level, can we conclude that the claim is true? Also, find the 99% confidence interval of the true mean.
The following ions are best described with resonance structures. Draw the resonance structures, and using formal charge arguments, predict the best Lewis structure for each ion. a. NCO- b. CNO-
A 800 kg car travels at 25 m/s behind another car (905 kg) that travels at 15 m/s. The two cars collided and were locked together after collision. Determine the velocity of the vehicle after collision.
Why can't normal hydrogen bonding with nitrogenous bases of DNA occur when the molecule is in duplex/helix form?
6. Lilian got a score of 55, which is equivalent to the 70th percentile in a mathematics test. Which of the following is NOT true?
A. 70% of the students got a score less than or equal to Lilian’s score.
B. Thirty percent of the class got scores of 55 and above.
C. If the passing mark is the first quartile, she passed the test.
D. Her score is below the 5th decile.
7. In a 50-item test, Angela got a score of 35 which is the third quartile. This means that:
A. She got the highest score.
B. Her score is higher than 25% of her classmates.
C. She surpassed 75% of her classmates.
D. Seventy-five percent of the class did not pass the test.
8. In the set of scores 14, 17, 10, 22, 19, 24, 8, 12, and 19, the median score is _______. A. 17 C. 16 B. 15 D. 13
The weights of the students in a class are the following: 69, 70, 75, 66, 83, 88, 66, 63, 61, 68, 73, 57, 52, 58, and 57.
8. Find the value of D8 of the students’ weights.
9. Calculate the value of D4 of the students’ weights.
10. What is the Q2 of the students’ weights?
The scores of Miss San Quintin candidates from seven judges were recorded as follows: 8.12, 9.10, 8.42, 9.14, 8.75, 9.17, and 8. 37
For numbers 4 – 6, refer to the given data above.
4. Find the 50th percentile or P50 of the judges’ scores.
5. What is the P30 of the judges’ scores?
6. Determine the 70th percentile of the judges’ scores
7. Calculate P40 of the judges’ scores
How do you How do you infer that cathode rays are ubiquitous for all matters?
