1. (TCO 1) Elijah has observed that more people run on sunny days as compared to

Question

1. (TCO 1) Elijah has observed that more people run on sunny days as compared to rainy days. The relationship between the amount of sun and the amount of people running is a(n) _____. (Points : 4)        correlation
       control
       hypothesis
       experiment
       theory

       COOH
       CH4
       CFC
       C6H12O6
       CO2

1. (TCO 4) A chemist found a bottle of an unknown concentration of KOH solution sitting on the shelf in the lab. She found that the pH was 12.0.

(a) Is the solution an acid or a base? How do you know? (10 points)
(b) What is the concentration of H3O+ ions in the solution? (5 points)
(c) The chemist decided to titrate the unknown solution with HCl to determine its concentration. She placed a 45.0 mL sample of the solution into a flask and mixed in a few drops of phenolphthalein. She then slowly added HCl and found that 75.0 mL of 1.5 M HCl was needed to neutralize the KOH. What is the concentration of KOH in the unknown solution? (10 points) (Points : 25)       

Question 2. 2. (TCO 5) What is a polymer? (10 points)
Two commonly used polymers are LDPE and HDPE. Compare and contrast the molecular structure and performance characteristics of these two polymers. Be sure to list similarities and differences. (15 points) (Points : 25)

Question 3. 3. (TCO 9) Describe genomics and proteomics. How are they similar? How are they different? What are some of the applications of each? (Points : 25)

Question 4. 4. (TCO11) What is ecological succession? (10 points)
Explain the process of succession after a forest fire. (15 points) (Points : 25)

Question 2. 2. (TCO 1) Each of the following is a testable hypothesis, except (Points : 4)        avoiding contact with other people reduces the chance of catching a cold.
       taking zinc lozenges at the first sign of cold symptoms reduces throat irritation.
       being a good driver makes you less likely to catch a cold.
       sleeping 8 hours a night reduces the severity of a cold.
       All of the above

Explanation / Answer

1.hypothesos because it is an assumption

2. all the above can be tested

3 properties changes with change in group

4 salt water also knows as brine solution . It is homogenous mixure having same concentration of salt throughout

5.25-12=13 (atomic number of mg is 12

6 2 atoms of phosphate

7 loss of electron is reduction

8. burning of toast

9. 400ml

10 is is a base because it accepts H+

11 extremely acidic because ph ranges from 1 to 14 1 is acidic so extremely acidic

12 particular aminoacid sequence

13 h bonding

14 all

15 ER i.e smooth ER and Rough ER

16 chloroplast

17 a

18 ethyl alcohol

19 d

20 2

21 telophase

22 cell divison

23 ribosomes

24 c no allergic reaction

25 d result will be cc

26 c

27 adaptive radiation

28 ciliates because they have true coelom

29 anther

30 all

31 eukaryote

32 biomas

33 deserts

34 d

35 Carbon die oxide

answer:- it is a basic solution because the h is 12 and it is a basic ph

the H3O concentration decreases because base has been added

answer:- when many monomer join with each other they form a monomer

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.