Jamie

1 ) If marginal utility over price ratio for good X is less than marginal utility over price ratio for good Y then

Select one:

a. X is more expensive than Y.

b. Y is more expensive than X.

c. spending a dollar less on X and a dollar more on Y increases utility.

d. spending a dollar less on Y and a dollar more on X increases utility.

2) Jessy spends no more than $77 per month on movies and eating out. The price of a movie is $8 and the price of a meal out is $15. Marginal utility of the first, second, third and fourth meal out are 135, 110, 90, 75, respectively. Marginal utility of the first, second, third and fourth movie are 88, 80, 64, 48, respectively.If Jessy wants to maximize her utility she should choose

Select one:

a. 3 movies and 4 meals out

b. 2 movies and 1 meal out

c. none of the answers

d. 4 movies and 3 meals out

3) If marginal utility is zero, consuming an additional unit of a product will cause total utility to decrease.

Select one:

True

False

4) When only one of the prices decrease, one of the intercepts of the budget constraint decrease and the other intercept stays the same.

Select one:

True

False

 5) If the prices of pizzas and submarine sandwiches fall by half and so does Michael s money income, we can conclude that Michael s budget constraint will

Select one:

a. shift out but remain parallel to the old one.

b. rotate in so that the slope of the budget constraint is doubled.

c. shift in but remain parallel to the old one.

d. remain unchanged.

1.) Explain why the reactivity of the group 17 halogens (F → I) increases up the group, while the reactivity of the Group 1 alkali metals (Li → Cs) increases down the group.

2.) Write a balanced chemical equation for the reaction of cesium (Cs) with water (H2O).

3.) Explain why the first ionization energy of magnesium is higher than that of sodium.

4.) State the electron arrangement of argon and explain why the noble gases, helium, neon and argon show the highest first ionization energies for their respective periods.

5.) Outline two reasons why a sodium ion has a smaller radius than a sodium atom.

6.) Explain why the ionic radius P3- is greater than the ionic radius of Si 4+.

1.) An element is in group 14 and period 3 of the periodic table. Which of the following statements about its electron configuration is accurate?

A.) There are 2 electrons in the 3rd energy level of this atom.

B.) There are 4 electrons in the 3rd energy level of this atom.

C.) There are 3 electrons in the 4th energy level of this atom.

D.) There are 2 electrons in the 4th energy level of this atom.

2.) Which statement is correct for all the elements in the same period?

A.) They have the same number of electrons in the highest occupied energy level

B.) They have the same chemical reactivity.

C.) They have the same number of occupied energy levels.

D.) They have the same number of neutrons.

1.) Copper consists of the isotopes 62Cu and 65Cu and has a relative atomic mass of 63.55. What is the most likely composition?

2.) What is the total number of p orbitals containing one or more electrons in germanium (atomic number 32)

3.) How many electrons are there in all the d orbitals in an atom of xenon?

4a) Explain why the relative atomic mass of argon is greater than the relative atomic mass of potassium, even though the atomic number of potassium is greater than the atomic number of argon.

4b) Deduce the numbers of protons, neutrons and electrons in a K atom?

5.) State the number of electrons and the number of neutrons present in an atom of 87Rb?

6.) The electron configuration of chromium can be expressed as [Ar]4s^x3d^y

i.) Explain what the square breackets around Ar represent?

ii.) State the values of x and y

how do I figure this out, the answer is 20 but idk why...

(a) Using a diagram, explain why demerit goods are considered to be an example of market failure [10 marks]

(b) Evaluate two possible government responses that could be used to address the problem of demerit goods [15 marks]

Towards the end of the season, a netballer had played 14 matches and had thrown an average of 16:5 goals per game. In the final two matches of the season she threw 21 goals and 24 goals. Find the netballer’s new average?

Equation: 4Al(s) + 3O2(g) → 2Al2O3(s)

please explain ?

I know the answer is 3 but not how..

2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)

please explain the steps?

I know the answer is 4.5 but don't exactly know how to get to it.

thanks:)

A.) 1 mol of S02

B.) 2 mol of N20

C.) 2 mol of Ar

D.) 4 mol of NH3

Im really confused on how to figure out the mass given the mol of the molecule. I know the answer is B (2 mol of N20) but have no idea how to calculate this.

1.) How many molecules are present in a drop of ethanol, C2H5OH (Mr = 46.07g mol^-1), of mass 2.3 x 10^-3 g? (La = 6.- x 10 mol^-1)

1.) Chlorethene, C2H3Cl (g) + 5O2 (g) → 4CO2 (g) + 2H2O (g) + 2HCl (g)

What is the volume, in dm3, of CO2 produced when 5.0dm3 of C2H3Cl is reacted with excess oxygen?

A.) 4.00

B.) 8.00

C.) 10.0

D.) 20.0

2.) A cylinder of gas is at a pressure of 40.0 kPa. The volume of the cylinder is doubled. What is the pressure of the fas after this change?

A.) 10.0 kPa

B.) 20.0 kPa

C.) 40.0 kPa

D.) 80.0 kPa

3.) Another cylinder of a gas is at a pressure of 40.0 kPa. The temperature of the gas (in K) is doubled. What is the pressure of the gas after this change?

A.) 10.0 kPa

B.) 20.0 kPa

C.) 40.0 kPa

D.) 80.0 kPa

4.) Why do gases deviate from the ideal fas law at high pressures?

A.) Molecules have finite volume

B.) Cohesive forces increase the volume from the ideal

C.) Increasing pressure increases the temperature of the gas

D.) Collisions between molecules occur more frequently as pressure increases

The following info relates to questions 5 and 6

A helium-filled weather balloon with a volume of 25.0 dm3 is released at a temperature of 35.0°C and an atmospheric pressure of 101.4 kPa.

5.) Calculate the moles of helium contained in the balloon (show workings)

6.) Calculate the mass of helium contained in the balloon (show workings)