Saturday

April 19, 2014

April 19, 2014

Total # Posts: 58

**Math**

51

**Chemistry**

It's a tripeptide. It doesn't explain how it's adjusted.

**Chemistry**

PLEASE HELP!! 40 mL of 0.1 M solution of a weak acid (adjusted to a pH of 7.75) is titrated with 0.2 M HCl to a final pH of 2.1. Once the pH of the weak acid reaches 2.1, it is then titrated with 20 mL of 0.25 NaOH. What is the final pH of the solution? pKa values are 2, 6, an...

**Chemistry**

The final concentration is 1 M

**Chemistry**

How do I prepare 30 mL of NaOH by dissolving it in water?

**Chemistry**

Thank you so much!

**Chemistry**

PLEASE HELP. If I have 0.10 mL of 200 mcg/mL protein, 0.90 mL of distilled water, and 2.00 mL of Bradford reagent, what is the concentration of the protein?

**Chemistry**

How do I convert micrograms/mL to micromol/L? Thanks

**Science**

Which statement best describes the relationship between science and technology? A. The goal of science is to gain an understanding of the natural world, while the goal of technology is to use that understanding to improve people's lives. B. The goal of science is to create...

**math**

25

**Geometry**

ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of A. If CN/NB=21, what is CM/MB ?

**Physics**

200

**science**

why is a blue star cuz of temperatuure or location

**science**

a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

**science**

a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy

**science**

Does the moon reflect or absorb sunlight?

**science**

a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

**science**

a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity

**algebra**

what is the opposite of -12 3/4 -12 is the whole number what is the opposite of that is it 51/4

**aqueous solution**

How many grams of NiF2 are there in 201 grams of an aqueous solution that is 12.8 % by weight NiF2.

**aqueous solution**

How many grams of NiF2 are there in 201 grams of an aqueous solution that is 12.8 % by weight NiF2.

**Physics**

A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?

**Statistics**

How will I know the modal class from a grouped data w/ equal class sizes if the highest frequency is 7 but then it appears thrice in 3 intervals. 34.00 - 39.69 frequency: 7 39.70- 45.39 frequency: 7 62.50-68.19 frequency: 7

**Math**

7x-3y+4z=18 13x+6y+8z=30 11x-9y-12z=16 Find x,y,z

**Math**

Yes please. that's the given. Well It's a bit odd because i wanted to use Cramer's rule.

**Math**

Find x,y,z (solution set) 2x+y+32=13 x+3y-z=4 23x-2y+4z=11

**Math (Help please)**

Tnx! :D

**Math (Help please)**

Find the points on y=(-x^2+4x-3)^3 that has a horizontal tangent line.

**physics**

you are to determine the amount of sugar dissolved in solution. how can you use polaroid filters to complete the task?

**physics**

two objects repel each other. can we be sure they are both electrically charged? how can we know which sign of charge? two objects attract each other. can we be sure both are electrically charged?

**math**

A number made up of the digits 4,5,and 6 is subtracted from a number made up of the digits of 0,2,8. The difference ia 157. Write out the entire problem?

**physical**

From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? W...

**physical**

From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? W...

**chemistry**

A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...

**hh**

When the baseball is shot straight upward with an initial speed of 20 \rm m/s, what is the maximum height above its initial location?

**physic**

In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 26m/s at an angle of 35^\circ above the horizontal.How high is the ball when it hits the wall?

**physic**

A dolphin jumps with an initial velocity of 13.0m/s at an angle of 41.0 ^\circ above the horizontal. The dolphin passes through the center of a hoop before returning to the water.If the dolphin is moving horizontally when it goes through the hoop, how high above the water is t...

**chm**

At a certain temperature the concentration of was 0.400 and that of was 0.235 . At equilibrium the concentration of was found to be 0.250 . What is the value of at this temperature?

**physics**

which will reach the bottom first, a hallow cylider or a solid cylider wth the same mass in an inclined plane?

**math **

what is the largest are of rectangular area that can be enclosed in sixteen meter fence ?

**physicssssss**

A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of 23.7 meters above the ground. The force of gravi...

**business**

Construction of a new plant: Architect's fees $ 4,000 Cash paid for land and run-down building thereon 120,000 Removal of old building 18,000 Salvage from sale of old building parts (4,000) Survey to site the new building 800 Legal fees for title search 1,400 Excavation fo...

**physics**

newyorks 33-m tower oscilatesnin the wind with a period of 6.80s calculate the frequency

**12grade economics**

suppose that your state raises its sales tax from 5 percent to 6 percent. the state revenue commissioner forecasts a 20 percent increase in sales tax revenue . is this plausible? explain.

**Physics**

19 m/s

**chem**

nicl2.6h2o + h2o+ nh3 chemical equation?

**esl**

is uses z or iz

**physics**

to find the change in percentage: (New-Old)/Old [(16^2)-(8^2)]/(8^2) = 3

**math**

one half gallon equals ----- quarts. i think it 2 gallons can you correct me please?

**criminal justice**

what is chain of evidence?

**criminal justice**

What are somes ways that we as a community can stop police brutality?

**pre-cal/trig**

Sorry, cosx+ sinx is not equal to 1 (from the identites). But, it was like this: (sinx)^2+ (cosx)^2= 1

**pre-cal/trig**

PlEASE hlep me with this!! I need it as soon as possible....... cos(x-(pi/4))+sin(x-(pi/4))=1 Find the answer from 0 to 2pi. When I slove this, I got cosx+sinx=(1/ square root of 2). then I don't know what to do the rest. Please help me.

**English**

The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. I would replace "you" with "one". Would that be correct? Yes. That's correct.

**English**

The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. Since it is a business letter, would "you" be an unclear pronoun? Yes. How would you make it more formal? I would replace you with one....

**English**

What, if anything, is wrong with the following sentence. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. a. Properly constructed sentence b. Comma splice c. Lacks parallel parts d. Unclear pronoun This is a properly constructed sentence. It ...

**English**

What, if anything,is wrong with the following sentence? a. Properly constructed sentence. b. Comma splice c. Lacks parallel parts d. Unclear pronoun Please type the sentence. Also, indicate what you think is wrong with the sentence.

**chem**

What is the name of the compound with the formula N2O5? Dinitrogen pentoxide. or Nitrogen(V) oxide What is BF3 and NaH?

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