A

When potassium chlorate is heated it decomposes into potassium chloride and oxygen gas:

2KClO3 --> 2KCl + 3O2

If 1.201 g of potassium chlorate decomposes and the oxygen gas is collected over water, what volume of oxygen gas is collected 755 mm Hg and 20.0 C? (Vapor pressure of water at 20.0 C = 17.535 mm Hg.

Can someone please explain the steps in doing this? Thank you so much!

MnO2 + KClO3 +KOH --> KMnO4 +KCl + H2O

how do you:

assign oxidation numbers

determine the oxidizing agent/reducing agent

Thanks!

Linnaeus was a "fixist" who believed that species remained fixed in the form in which they had been created. Linnaeus would have been uncomfortable with:

A.the scientific discipline known as taxonomy.

B. a hierarchical classification scheme.

C.nested, ever-more inclusive categories of organisms.

D.classifying organisms using the morphospecies concept.

E. phylogenies.

Could someone explain how to do this?:

A mixture of sodium chloride, ammonium chloride, and sand was subjected to a separation. If a 3.5543g mixture was separated to isolate 2.1035g of sodium chloride, and 0.2904g of sand, what was the percentage of each component of the mixture?

Thank you!

1. Which reaction produces the maximum yield of ATP energy when one molecule of glucose is oxidized?

a. Glycolysis

b. Citric Acid Cycle

c. Fermentation and glycolysis

d. Oxidative Phosphorylation

e. Glycolysis and Citric Acid Cycle (I think it's this one?)

2. Which statement describes redox reduction?

a. Reduction does not occur without oxidation

b. A molecule is reduced if it gains electrons

c. Oxidation generally involved the loss of H+ ions in addition to the loss of electrons.

d. All of these describe redox reduction (I think it's this one?)

3. One function of the Citric Acid cycle is:

a. the production of ADP

b. the reduction of NAD+ to NADH (I think it's this one?)

c. The oxidation of FADH2 to FAD.

d. the conversion of glucose to lactic acid

e. the production of sugar.

Thank you!! :)

The perimeter of a triangle is 126 units. The length of one side is twice the length of the shortest side. The length of the third side is 14 more than the length of the shortest side. Find the length of the sides of the triangle.

Thank you!

I've been stuck on one problem ( complex fractions ) for some time:

2 - 3/x+1 OVER 1/x^2-3x-4 -- 2/4-x

Can someone explain please? Thank you!

Unwanted

The poster with my picture on it

Is hanging on the bulletin board in the Post Office.

I stand by it hoping to be recognized

Posing first full face and then profile

But everybody passes by and I have to admit

The photograph was taken some years ago.

I was unwanted then and I'm unwanted now

Ah guess ah'll go up echo mountain and crah.

I wish someone would find my fingerprints somewhere

Maybe on a corpse and say, You're it.

Description: Male, or reasonably so

White, but not lily-white and usually deep-red

Thirty-fivish, and looks it lately

Five-feet-nine and one-hundred-thirty pounds: no physique

Black hair going gray, hairline receding fast

What used to be curly, now fuzzy

Brown eyes starey under beetling brow

Mole on chin, probably will become a wen

It is perfectly obvious that he was not popular at school

No good at baseball, and wet his bed.

His aliases tell his history: Dumbell, Good-for-nothing,

Jewboy, Fieldinsky, Skinny, Fierce Face, Greaseball, Sissy.

Warning: This man is not dangerous, answers to any name

Responds to love, don't call him or he will come.

Symbol? I think it's the photograph..Not sure though.

Solve 3x^2+6x+6=0 using the quadratic equation

a. x=1/2, x=-3

b. x=-1 +i, x= -1 -i

c. x= -2, x= 2

d. x=6 +i , x=6-i

Thank you!

Rewrite the equation y=(x-4)^2-3 in general form

a. y=x^2-4x-3

b. y=x^2-8x+13

c. y=4x^2-3x+12

d. y=x-4x+3x^2

Find the value of x in the following system of equations:

3x+2y+z=6

x+y+3z= - 5

4x+y-z =10

a. x=1

b. x=2

c. x=3

d. x=4

Thank you! :)

1. Simplify:

(x^2 - 4y^2) - (3x^2 - 2y^2)

a. -2x^2 - 6y^2

b. -2x^2 - 2y^2

c. 4x^2 - 6y^2

d. -2x^2 + 2y^2

What I got was D

Another Question is simplify:

(3x^2 + 2x -5) + (5x^2 - 4x +6)

a. 8x^4 -2x^2 +1

b. -2x^2 +6x - 11

c. 8x^2 +2x - 1

d. 8x^2 - 2x +1

I got D..

Are these answers correct? Thank you! :)

(4X)^3 (-2X^3)^2

a. 8X^5

b. -8X^9

c. -256x^5

d. 256x^9

I got B but I'm not quite sure...

Simplify:

(X^2)(X^3(X^5)(X^0)

a. X^30

b. x^10

c. x^0

d. 1

Would the answer just be X^0 or 1?

Thank you!

1) Give the domain of the set {(2, 3), (0, –1), (1, 4), (5, 3)} and tell if the relation is a function.

a. {–1, 3, 4}; not a function

b. {–1, 3, 4}; a function

c. {0, 1, 2, 5}; not a function

d. {0, 1, 2, 5}; a function

2) Give the range of the set {(3, 0), (–4, 2), (3, 1), (5, –3)} and tell if the relation is a function.

a. {–3, 0, 1, 2}; not a function

b. {–3, 0, 1, 2}; a function

c. {–4, 3, 5}; not a function

d. {–4, 3, 5}; a function

Can you please help me with these and maybe explain?

Thank you! :)

Describe how radiation into new adaptive zones could result in macroevolutionary change...

Thank you! ( :

Describe how radiation into new adaptive zones could result in macroevolutionary change...

Thank you! (:

Explain how continental drift may have played a role in the history of life.

Thank you!(:

What was the major conflict in The Godfather Part I?

The main branch of the University of Texas is located in Austin.