Nathan C

What volume of O2 at 298K and 2 atm is required to react completely with 2L of Methane at the same temperature and pressure? Here, because you are looking at a reaction, you need a balanced chemical equation. You need to determine the number of moles of methane, which you can do, since you have pressure, volume, and temperature. Then, utilizing the mole to mole ratio from your balanced chemical equation, you can calculate the number of moles of O2 required to react with the methane. From there, you can use the relationship to determine the final volume of O2.

The balanced chemical equation for the reaction of pentane (C5H12) with oxygen to produce carbon dioxide and water is what?

How many moles of P4O10 are produced when we react 8 moles of phosphorous with oxygen?

How many atoms of hydrogen are contained in 100g of methane (CH4)?

Choose the one molecule from this list that should have the largest partial positive and negative charges: NO, CO2, O2, CH4, NH3.

Pretend that eyes only come in three colors, brown, green and blue. Eye color is dependent on two genes. Brown or blue on the first, and green or blue on the second. (This will be a Punnett Square with two traits.) The first gene controls a colored layer near the front of the eyeball (nearest the observer). If this colored layer is brown (BB or Bb), the observer will see brown eyes and the second layer will not be seen. If the first layer is blue (bb), the observer will see through that layer to the second colored layer behind it. The second colored layer can be green (GG or Gb) or blue (bb). If a woman has green eyes, what are her possible allele combinations on her genes for eye color (her possible genotypes)? List them all.

Pretend that eyes only come in three colors, brown, green and blue. Eye color is dependent on two genes. Brown or blue on the first, and green or blue on the second. (This will be a Punnett Square with two traits.) The first gene controls a colored layer near the front of the eyeball (nearest the observer). If this colored layer is brown (BB or Bb), the observer will see brown eyes and the second layer will not be seen. If the first layer is blue (bb), the observer will see through that layer to the second colored layer behind it. The second colored layer can be green (GG or Gb) or blue (bb). If a woman has green eyes, what are her possible allele combinations on her genes for eye color (her possible genotypes)? List them all.

A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to the ramp and placed on a 1 ft. tall support. The bottom of the support is 8 feet from the point where the ramp meets the ground. The slope of the ramp is 2/5 (this means that for every 2 feet it goes up, it goes 5 to the side). Find the length of the beam to the nearest hundredth of a foot. Note that the 1 ft. support is vertical, but the metal beam is not.

Break out your graph paper, and be prepared to use everything you know about triangles and plotting points!

Remember a slope of 2/5 means that everytime you go horizontal 5 units, you go vertical 2 units. (So at 10 units, it should be vertical 4 units, and at 15 it should be vertical 6 units, etc.) Also remember that perpendicular lines have an opposite slope...so if a line has a slope of 1/3, then its perpendicular line will have a slope of -3/1.

Find the distances and plot the points, so you can use the distance formula on the points on either side of the metal beam to find its length! Look for any possible way to find the information you need!

Do the problem step by step, showing your work and explaining what you did to find the answer (the drawings here will help, but make your own--you do not need to submit your drawing, you only need to use it for your own reference). On three of the steps, "prove" what you're doing by stating the theorem or definition you're working with. (You must have three separate proofs--using the distance formula three times doesn't count!)

Good luck!

Come up with a way to find the area and volume of a football. Include in your answer a way to acquire any necessary measurements without cutting or otherwise destroying the football. Also include all necessary formulas to implement your idea. (You don't need to find actual numbers, just outline the method in step by step detail--think of all the measurements you'll need to acquire and how you'll get them.)

If a hexagon is resting on a flat side, and has a total height of 18, what is the area of the hexagon?

If a hexagon is resting on a flat side, and has a total height of 18, what is the length of each side of the hexagon?

If a hexagon has a radius (center to point of angle) of 6, what is the area of the hexagon?

If a hexagon has a radius (center to point of angle) of 6, what is the side of the hexagon?

use the Venn Diagram.

25 students played soccer

4 boys played soccer and baseball

3 girls played soccer and baseball

10 boys played baseball

4 girls played baseball

9 students played tennis

3 boys played soccer and tennis

3 girls played soccer and tennis

3 boys played baseball and tennis

1 girl played baseball and tennis

1 boy played all three sports

1 girl played all three sports

How many students played soccer, but not baseball or tennis?

a 4

b 25

c 12

d 6

e 14

f 9

How many students played soccer and baseball, but not tennis?

a 5

b 10

c 3

d 4

e 7

f 13

use the Venn Diagram.

30 people are having lunch at my house. 16 of them want salads, 16 of them prefer pasta, and 11 of them want steak. 5 say they want to have both salad and steak, and of these, 3 want pasta as well. 5 want only steak, and 8 want only pasta. How many people want salad only?

a 3

b 4

c 16

d 7

e 11

f 5

use a Venn Diagram.

30 people are having lunch at my house. 16 of them want salads, 16 of them prefer pasta, and 11 of them want steak. 5 say they want to have both salad and steak, and of these, 3 want pasta as well. 5 want only steak, and 8 want only pasta. How many people want salad only?

a 3

b 4

c 16

d 7

e 11

f 5

use a Venn Diagram.

500 students are enrolled in at least two of these three classes: Math, English, and History. 170 are enrolled in both Math and English, 150 are enrolled in both History and English, and 300 are enrolled in Math and History. How many of the 500 students are enrolled in all three?

a 300

b 330

c 200

d 120

e 90

f 60

Find the center of the ellipse or hyperbola:

(x+3)^2/4 – (y-3)^2/9 = 1

A (3,-3)

B (-3/2,1/3)

C (3/2,-1/3)

D (-3/4,1)

E (-3,3)

F (3/4,-1)

Find the vertex for the parabola:

y = -3(x+1)^2 + 6

A (-3,6)

B (-1,6)

C (1,6)

D (3,6)

E (-1,2)

F (-1,-2)

Find the vertex for the parabola:

y = (1/2)(x-3)^2 + 2

A (3/2,2)

B (-3,2)

C (-3/2,2)

D (3,-2)

E (-3,-2)

F (3,2)