Describe the changes in color and state of matter that occurred when the iodine is heated.

Compare the color of crystals on the evaporating dish bottom with those in the iodine reagent bottle.

Compare the colors of the two cyclohexane solutions after the samples were added.

What is the identity of the deposited substance on the bottom of the evaporating dish? Explain your reasoning.

What pieces of evidence demonstrated that physical changes occurred? Explain your reasoning in a logical, scientific manner based on the experimental evidence.

Compare the original copper metal with the material obtained after heating the copper.

Compare the color of the liquid obtained after putting the unheated copper in the sulfuric acid to the color of the liquid obtained after putting the heated copper (black material) in the sulfuric acid. In other words, compare the color of the liquids in the two test tubes.

Do copper and the black material (copper(II) oxide) have the same physical and chemical properties? Explain your reasoning.

What is the Cash flow from Assets?
What is the OCF?
What are the changes in NWC?
What are the Net New Borrowing from Creditors and from Owners?

ARE THESE STATEMENTS TRUE OR FALSE:

1. Epigenetic changes to the DNA are passed down to the offspring, however, they do not cause changes to the genes, or alleles. Is this statement true or false?

2.Genes are located on chromosomes. Is this statement true or false?

3.  If someone with type B blood has children with someone who is type A blood, is it possible for them to have a child that is type O? YES OR NO?

A researcher is interested in whether there are changes in child aggression after they watch another child get something that they want. She devises an experiment where children come into her lab and are given worn and broken toys to play with. After a short time, a new child is brought into the room and is given new, shiny toys to play with. The researcher wants to know whether there are changes in aggressive behavior among the children with the broken, worn toys after they see the new children playing with new, shiny toys. She measures the number of aggressive behaviors displayed by the children who were given the worn and broken toys both before and after they watch the new children playing with new, shiny toys. Her findings are summarized in the table below.

a. Identify the IV, IV levels, and DV.

IV:
Levels:

DV:

b. Is this experiment a paired-samples or independent-samples design?

c. State null and alternative hypotheses in words.

H₀:
H₁:

d. Conduct a statistical test of the hypothesis

t =

e. Decide whether to reject or retain the null hypothesis.

f. Interpret your results.

1. Describe the regulatory responsibility of AUSTRAC in the context of this case. What changes (if any) to the scope of their responsibility were brought about by the findings of the 2018 Royal Commission into the Banking sector. In regards  to the Commonwealth bank Unwitting Mule article

1) For the following reaction at equilibrium in a reaction vessel, which one of these changes would cause the Br2 concentration to decrease?


2NOBr(g)  2NO(g) + Br2(g), ∆Horxn= 30 kJ/mol

A) Increase the temperature.

B) Remove some NO.

C) Add more NOBr.

D) Compress the gas mixture into a smaller volume.

A national chain of coffee shops claimed that 60% their servers are notified of changes in their work schedules in advance. A random sample of 200 servers showed that 100 were notified of changes in their schedule in advance. Perform a hypothesis test at 95% confidence to determine if the claim could be true. To get full credit state your null and alternate hypothesis, show test statistic and p-value and state your conclusion: could the company’s claim be true? YES or NO

APPLY THE CONCEPTS: Use the CVP graph to analyze the effects of changes in price and costs Graph the following on your own paper. At the original position, the break-even point in sales dollars is $24,000 at 500 units. The fixed costs are $8,000. Assume the slope of the sales line is equal to the selling price. When the two points of the sales line are at the origin and the break-even point, you see that the slope of the line is $48, which means that the selling price is $_______ . When the two points of the total costs line are at the origin and the break-even point, you see that the slope of the line is $32.00, which means that the variable cost per unit is $_______ . Leave the break-even point (x) at its original position. Use it as a reference point to answer the following questions. Analyze the scenarios by sliding the points on the lines to get the slope desired. Recall that the new break-even point for each scenario exists where the sales and total costs lines intersect. Compare it to the original break-even point (x). (You may want to put the lines back to their original position for each scenario.)

Amino acids occasionally are used as buffers. A buffer is a solution that resists changes in pH when acid or base are added. The pH range over which a buffer is effective is called the buffering range, usually defined as pKa + 1 to pKa -1.

a. Indicate the buffering range (or ranges) of Gly, His, Asp and Lys .

b. Choose an amino acid to buffer at pH = 4, pH =6, pH =9, and pH =12.

c. Would you expect a protein containing 100 amino acids to be as good a buffer as its constituent free amino acids at equivalent molar amino acid concentrations? Explain.