Thursday

April 24, 2014

April 24, 2014

Total # Posts: 787

**Alg & Trig 2**

find the sum of 1/2, 2/7x, and 5/x

**Chemistry**

Calculate the enthalpy change in kJ when 21.6g of H2S is burned. 2H2S(g) + 3O2(g) --> 2SO2(g) + 2H20(g) Change in H=-1036kJ/mol

**Business**

Which economic system is the best solution to handling a crisis of epic proportion?

**Physics Help!!**

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg*m^3 of radius 120 km and height 4.5 km. Make a crude estimate of the an...

**science**

Which of the following chemical reactions is written to show that mass is conserved? A H2O to H2+O2 B CH4+202 to CO2+2H2O C Mg+HCI to 3MgCI0+H2 D N2+H2 to NH

**Physics**

A 3.6 m diameter merry-go-round is rotating freely with an angular velocity of 0.78 rad/s. Its total moment of inertia is 1700 kg m^2. Four people standing on the ground, each of mass 62 kg, suddenly step onto the edge of the merry-go-round. What is the angular velocity of the...

**English**

Idententify the sentence parts - Whose car did the parking attendant tow yesterday?

**consumer math**

$400.OO

**Finance**

what is the present value of 1000 paid at the end of each of the next 100 years if the interest rate is 7% per year

**College Algebra and Trig**

a rancher has 12,000 feet of fence to enclose 5 adjacent pens. determine the outer rectangular dimensions that result the maximum enclosed area.

**math**

Erica took 2 days to drive 1,020 miles. On the first day she drove 10 hours at an average spped of 62 mile per hour. on the second day, her average spped was 57 miles per hour. approx. how long did she drive on the 2nd day?

**geometry**

A manufacturer wants to make a rectangular storage box with volume 0.75 cubic meters, length 1.5 meters and width 0.4 meters. What is the height of the box?

**math**

the coordinates of triangle KLM are K(-2,-5), L(0,1), M(6,-2) What type of triangle is KLM? A) obtuse isosceles B) acute scalene C) right isosceles D) right scalene

**GEOMETRY**

Alicia is 5ft tall. she casts a shadow that measures 6 1/2 feet long at the same time that a sculpture in the park casts a shadow 12 ft long. which of the following is the approximate height of the sculpture? a) 2.0 miles b) 6.6 miles c) 12 miles d) 15.6 miles

**Ohlone**

6moles

**math**

how do you find the function of the domaine

**Chem.**

Suppose that 55 mL of 0.2 M LiOH and 55 mL of 0.3 M HNO2 are mixed. What is the K for the dominant equilibrium in terms of Ka's, Kb's, Kw etc.?

**Chemistry**

NH4+ OH-=NH3+H20

**Chemistry**

NH4+ + OH- NH3 + H2O What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?

**Psychology**

What different tools of psychology help us with work and everyday life situations?

**Chemistry**

Calculate the solubility of LaF3 in grams per liter in the following solutions. The Ksp of LaF3 is 2.01 e-19. (a) pure water (b) 0.051 M KF solution (c) 0.065 M LaCl3 solution

**physics**

Your groceries are in a bag with paper handles. The handles will tear off if a force greater than 59 N is applied to them. (a) What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with constant speed? kg (b) What if it is...

**reading**

see Marjorie's personality as shallow

**math **

-2(-5+2)-3(3-4)-5

**math **

on a single day the temperature in alaska dropped from a high of -12 f to a low of -50. what os the difference between the high and low temperatures

**Chemistry**

3H2(g)+N2(g)=2NH3(g) Suppose the equilibrium constant Kp = 0.003337 for the reaction above. If the equilibrium mixture contains partial pressures H2 = 0.400 atm and N2 = 0.350 atm. What is the equilibrium partial pressure of NH3 in atm?

**physics**

A brick is thrown upward from the top of a building at an angle of 25° to the horizontal and with an initial speed of 17 m/s. If the brick is in flight for 2.5 s, how tall is the building?

**Algebra**

how do you factor 4c^3-500 ?

**art**

please help me pick a favorite harlem Renaissance name of the picture date/time material used. and used for and symbolism

** college art **

please help me pick a favorite harlem Renaissance name of the picture date/time material used. and used for and symbolism

**physics**

A truck covers 40.0 m in 8.60 s while smoothly slowing down to a final velocity of 2.00 m/s. (a) Find the truck's original speed. (b) Find its acceleration.

**Chemistry**

Some physical properties of water are shown below. freezing point 0.00°C boiling point 100.00°C Kf 1.86°C/m Kb 0.512°C/m A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.6°...

**Chemistry**

If you are making 430.0 g of 0.41 m Na2SO3, how many grams of the solute should you use? I got 20 grams, but I don't think this is the right answer.

**math**

There are about 9ft per yard

**math**

Area= 2(L+W)

**Grammar**

Thank you

**Grammar**

(Check these please)Identify these sentences as compound, simple or run-on sentences. 5. Percy Shelley traveled in Europe and visited friends.(simple) 6. Shelley made friends with other poets; John Keats was Shelley's friend.(compound) 7. William Godwin was another friend,...

**chemistry**

Which of the following are solutions? Choose all that apply. (Note: do not pick heterogeneous systems that contain a homogeneous phase.) - Cold coffee or cold tea. -Cigarette smoke. - Tap water. - Milk. - Fog. - The air typically found in a room. - Pure water.

**chemistry**

11:54Am

**chemistry**

11:54Am

**Grammar**

Thank you

**Grammar**

Is this one right. The most likely theory, perhaps,/called it a comet of tiny pieces of metal.

**Grammar**

Seperate the complete subject and the complete predicate. There are many theories/ about the Tunguska Fireball. Is this right?

**science**

A mixture of two gases, Xe and H2, has the properties listed below. PXe=190torr PT=250torr What is the ΧH2 for this mixture? I'm sorry I really don't get this.

**science**

A mixture of two gases, C2H2 and H2, has the properties listed below. nC2H2=0.028moles nH2=0.015moles PC2H2=79torr What is the PT for this mixture? I first found out the mole fraction by first adding H2 and C2H2 and got 0.043, then did 0.028/0.043. I rounded it to 0.651. I th...

**science**

oops the "t" is supposed to be a capital one, if that means anything.

**science**

Could anyone please explain this formula to me, and give me an example of how it is used? Pa=Xa*Pt the "a" and the "t" are subscripts.

**MATH**

use these facts to find the equation for the circle center (0,0), radius=6 a)x2-y2=36 b)x2+y2=36 c)x2-y2=6 d)x2+y2=6

**math**

in square ABCD, AD=3x+7 and CD=6x+6 Find AD and CD A)1/3 B)16 C)3 D)8

**MATH**

In isosceles trapezoid ABCD, AB=22, CD=34 and AC=10. Find BD A)28 B)5 C)10 D)35

**math**

using the law of detachment, what can be concluded regarding the following statements: If a figure is a rhombus, then it is an eqilateral quadrilateral. A square is a rhombus. a) a rhombus is a square b) a square is a rhombus c) a square is an equilateral quadrilateral d) an e...

**math**

which statement is biconditional a)if x=5, then 2x+3=13 b)if two angles are a linear pair, then they = 180 degrees c) if the car runs out of gas, then it will stop d) if a figure is square, then it has four sides

**math**

simplify -2(-6y+2) +4y(4z+5y)

**Chemistry**

A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 750 mL of a solution that has a concentration of Na^+ ions of 1.3 M? Express your answer numerically in grams.

**Chemistry**

A student placed 17.0 g of glucose (C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was u...

**Chemistry**

How many kilograms of chlorine are in 22 kg of each of the following chlorofluorocarbons CFCs? 1.CF2Cl2 2.CFCl3 3.C2F3Cl3 4.CF3Cl

**Chemistry**

Determine the number of moles of oxygen atoms in each of the following. 5.91mol H2O2 2.7mol N2O 2.23mol CO2

**Chemistry**

Silver chloride, often used in silver plating, contains 75.27% Ag. Calculate the mass of silver chloride required to plate 195mg of pure silver.

**Chemistry**

Upon decomposition, one sample of magnesium fluoride produced 1.64 kg of magnesium and 2.57 kg of fluorine. A second sample produced 1.38 kg of magnesium. How much fluorine (in grams) did the second sample produce?

**college chemisrty**

A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.0...

**college chemisrty**

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 and the initial pressure of chlorine was 1.65 . The piston was pushed down to change the volume to 1.00 . Calculate the final pressure of the gas if the ...

**college chemistry**

A closed container is filled with oxygen. The pressure in the container is 325 . What is the pressure in millimeters of mercury?

**chemistry**

Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 , to what pressure should you fill the acet...

**MATH**

a picture measures 16inches wide by 20inches long. if the frame is to be 20inches wide, what is the scale factor of the frame as a dilation of the picture, and what is the length of the frame?

**math**

which of the following triangles is both an obtuse triangle and isosceles triangle. A triangle with angles measuring: a) 60,60,60 b) 120,30,30 c) 110,15,55 d) 30,70,80

**math**

a picture measures 16inches wide by 20inches long. if the frame is to be 20inches wide, what is the scale factor of the frame as a dilation of the picture, and what is the length of the frame?

**math**

Bob constructed a decorative planter using 4inch squares attached to a rectangular base. what is the volume of the planter/

**math**

what is the total surface area in meters of a cylinder that is 12m in diameter and 14m in height

**math**

Victoria has two tea sets that are similar in size. The larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it?

**math**

8/30=x/75 solve for x

**math**

Victoria has 2 tea sets that are similar in size. the larger teapot is 12in tall and 6in wide. if the smaller teapot is 8in tall, how wide is it

**math**

if it takes 8 quarts of ice cream to feed 30 people, how many quarts will it take to feed 75 people?

**math**

8/2=12/x what does x equal?

**english**

IN NEED OF HELP. I HAVE A FIVE PAGE ESSAY TO WRITE ON ANTIGONE AND I HAVE NO CLUE WHAT THIS POEM IS TALKING ABOUT. CAN SOMEONE HELP ME PLEASEEEEEEEEEEEEE

**MATH**

DOES ANYONE KNOW HOW TO DO THE GRATEST COMMON FACTOR IN THE 8TH GRADE?

**algerbra 1**

WELL I DONT KNOW BUT I THINK IT IS Y=-3X+3 SO YOU DID GOOD

**trig**

the leg opposite the 50 degree angle in a right triangle measures 8 meters. find the length of the hypotenuse

**trigonometry**

the leg opposite the 50 degree angle measures 8 meters. find the length of the hypotenuse

**physics**

Toby the cat is stuck in a tree. Billys dad placed a ladder 5 ft from the base of the tree and then leaned the ladder against the tree. the top of the ladder is where toby is sitting. if the ladder makes a 65 degree angle with the ground, how far up the tree is the cat?

**Literature**

Post a 150- to 300-word response to the following discussion question by clicking on Reply · Select one essay from this week’s assigned reading, and do the following: 1. Explain the most important difference between an essay and a short story, poem or play. 2. Comp...

**PreAlgebra**

Write the decimal as an equivalent percent. 0.282

**human relations**

a amjor obstacle to developing good human relations skills is that

**british literature**

DESCRIBE THE TONE OF "THE WANDERER."

**Chemistry**

i can somewhat help with this: temperature is not important so forget that part teke ur ml and convert to L by dividing 880 by 1000 thats as far as I know how to go hope it helps a lil bit ...

**Chemistry**

yep forgot the units sorry.

**Chemistry**

v1- 725/100 = .725 v2 - unknown t1- 240 C +273 K (to convert celcius to kelvin t2 - 54.5 C + 273 K V2 = .725 x 327.5 / 513 v2 = .462841 V2= .46

**Chemistry**

What is the final volume of 725 mL of neon gas at 240.°C if the gas is cooled to 54.5°C? Assume the pressure and the amount of gas are held constant.

**Chemistry**

To what Celsius temperature must 44.0 mm Hg of methane gas at 89.0°C be changed so the pressure will be 83.0 mm Hg? Assume the volume and the amount of gas are held constant.

**Chemistry!!!**

thankyou

**Chemistry!!!**

Is the molarity of a solution that contains 6 moles of solute in 2 liters of solution 12 M????

**Chemistry**

Its 2.7 thanks so much!

**Chemistry**

To increase the solubility of a gas at constant temperature from 1.20 g/L at 1.4 atm to 2.3 g/L what would the pressure have to be increased to?

**chemistry**

more

**still lost here**

ok im still lost...??

**chemistry**

If the solubility of a particular solute is 10 g/100 g H2O at 20 oC, which of the following would represent a supersaturated solution of that solute: a) 9 g/100 g H2O at 20 oC, or b) 11 g/100 g H2O at 20 oC.

**spanish**

What does "Que pantalones" mean

**civics**

Ok thank you

**civics**

I cannot find the answer to this question. In which local areas is the problem of balancing funding and services uasually most severe? a. rural areas, b. suburban areas, c. cities, d counties. I am guess the answer is D because the book states "local governments are facin...

**civics**

Thank you

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