# Questions Asked onNovember 18, 2010

1. ## chemistry

23) The equilibrium constant for the gas phase reaction 2NH3 (g) N2 (g) + 3H2 (g) is Keq = 230 at 300 °C. At equilibrium, __________. A) reactants predominate B) products predominate C) only products are present D) roughly equal amounts of products and

2. ## Chemistry 101

A flask containing a mixture of CH4(g) and NH3(g)is cooled. At -33.3c a liquid begins to form in the flask. What is the liquid? NH3(g) or CH4(g)

3. ## trig

find exact value using sum or differnce equations. tan(19pi/12)

4. ## Chemistry 20 TRUE OR FALSE

1) A conductivity apparatus is not that useful in separating acids from bases because both solutions conduct electricity. True or false 2)The hydronium ion contains a water molecule bonded to a hydrogen ion. True or False

5. ## Calculus

Use a linear approximation (or differentials) to estimate the given number. (32.06)^4/5

6. ## physics

A 52 g mountain climber, start from rest, climbs a vertical distance of 730 m. At top, she is again at rest. In the process, her body generates 4.1*10^6 J of energy via metabolic processes. Her body acts like a heat engine with efficiency ( W/Q_h.) W is

7. ## Pre Calc

7. The Sandusky Little League uses a baseball throwing machine to help train 10-year old players to catch high pop-ups. It throws the baseball straight up with an initial velocity of 48 ft/sec from a height of 3.5 ft. a. Find an equation that models the

8. ## chem class

The value of Keq for the following reaction is 0.25: SO2 (g) + NO2 (g) SO3 (g) + NO (g) The value of Keq at the same temperature for the reaction below is __________. 2SO2 (g) + 2NO2 (g) 2SO3 (g) + 2NO (g) answer is 0.25 how do i figure this out?

9. ## chemistry

A possible mechanism for the overall reaction Br2 (g) + 2NO (g) -> 2NOBr (g) is NO (g) +Br2 (g) (equilibrium arrows: on top it says k1 and on bottom k-1) NOBr2 (g) (fast) step 1 NOBr2 (g) + NO (g) ->(on top of arrow k2) 2NOBr (slow) step 2 the question:

10. ## Statistics

A bowl contains 3 red balls, 2 blue balls and 5 white balls. A ball is selected and the color noted. Then it is replaced. A second ball is selected and its color noted. Find the probability of getting a red ball and a blue ball.

11. ## Physics

A Ferris wheel with radius 9.8 m rotates at a constant rate, completing one revolution every 36.6 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.227 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction of

12. ## college chemistry

To dilute a solution from 0.600 M to 0.100 M, the final volume must be A. 1/6 the original volume. B. 0.7 L. C. More information is needed to answer this question. D. 6 times the original volume. E. 60 L.

13. ## geometry

IF AB=10 UNITS AB= 8 UNITS AC= 12 UNITS ED= 4.5 UNITS IF ANGLE AED= 100 DEGREES WHAT IS THE MEASURE OF ANGLE DEC

The kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high is?

15. ## Chemistry

A mole of methane reacts with 64g of oxygen at 1 atm, 425 K. There are two ways in which methane can react with oxygen. It can either form water vapor and carbon dioxide or water vapor and carbon monoxide. After reaction the final gas density is 0.7282

16. ## english

What type of literary or dramatic works did William Shakespeare write? burlesque pantomime satire Restoration comedy heroic drama Elizabethan drama autobiography

17. ## science

what is the momentum of a 57 kg cheetah running north at 27 m/s?

18. ## chemistry

Consider the following reaction at equilibrium: 2NH3 (g) N2 (g) + 3H2 (g) ΔH° = +92.4 kJ Le Cha ^ telier's principle predicts that increasing the temperature will shift the reaction to the. a) stays same b)leftc)none d)right

19. ## trig

find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-pi/5)

What didgit is in the thousands place 1,234.5678 would it be 1 or 7

21. ## Math

Find the present value of the annuity necessary to fund the withdrawal of $600 per month for 10 years, if the annuity earns 2% per year and if there is to be$10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and

22. ## Physics

A concave mirror has a radius of curvature of 3.4 cm. (a) Determine the object position for which the resulting image is upright and seven times the size of the object. cm? (b) Draw a ray diagram to determine the position of the image. (Use a negative

23. ## Chemistry

Which of the following statements is a false statement concerning characteristics of chemical equilibrium? a. Equilibrium is dynamic. b. For a specific reaction at a specific temperature, the equilibrium state will be dependent of the direction of approach

24. ## Chemistry

The following reaction has an equilibrium constant of 0.020 at a given temperature. 2HI(g) I2(g) + H2(g) If you have 1.00 mol HI(g) in a 0.750-L container initially, how many moles of HI(g) will be present when the system reaches equilibrium?

25. ## math-optimal diameterand height

A cylindrical oil-storage tank is to be constructed for which the following costs apply: cost per square meter metal for ides $30.00 combined costs of concrete base and metal bottom$37.50(cost per square meter) top 7.50 (cost per square meter) The tank is

26. ## algebra

Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents?

27. ## english

I think that paragraph 3 is more effective than paragraph 1 because it is structured in a better manner and has better rhythm than paragraph1. It also has better structures sentences than paragraph 1. For example in paragraph 1 sentences like, ‘My Aunt

28. ## chem

The bottom of a box has a surface area of 31.4 cm2. The mass of the box is 47.1 kilograms. Acceleration due to gravity at sea level is 9.80 m/s2. What pressure is exerted by the box where it rests? how do i solve this?

29. ## math

I need to simplify the following rational exponent: (64n^9)^2/3 I've done the following but don't think this is right: = 3|64n^18 = 4n^2.62 I don't know how to type in the root symbol so I used | to mean root. Can someone please verify this and if

30. ## math

Suppose that Helen buys three items for 47 cents each, five items for 71 cents each, and two items for 1.21 each. What was the average cost of all the items she bought? Would the answer be 74 cents?

31. ## statistics

When a card is selected from a deck, find the probability of getting a diamond, a face card or a diamond, or a club and a king?

If a circle has a diameter of 7inches, what is the circumference rounded to the nearest whole number? Use pi=3.14

33. ## Chem

A chemical reaction in a bomb calormeter evolves 4.66Kj of heat. If the heat capcity of the calorimeter is 1.38 Kj/C what is the temperature change?

34. ## physics

The figure below shows an initially stationary block of mass m on a floor. A force of magnitude F = 0.570·mg is then applied at upward angle è = 22°. (a) What is the magnitude of the acceleration of the block across the floor if (a) ìs = 0.600 and ìk

35. ## Physics

Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board 6.0 long . Two playmates are already on either end. Boy A has a mass of 50 , and girl B a mass of 35 . Where should

36. ## Algebra

Algebra Help? Union & Intersection of Sets, Complement and Cross Product, Relations &Functions,Venn Diagram? I did a survey on which type of pie they like I already drew the vinn diagram but cant Jiskha does not accept that format. this is what I got Step

37. ## Psychology/Essay question

Dissent and altruism are a matter of personal conviction, but situation factors are involved also. Analyze five situational factors that are involved when a person decides to "rock the boat" and choose conscience over conformity. I do not understand what

38. ## physics

Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg. The edge of the roof is 100 m above the ground. The two masses are initially at rest

39. ## organic chemistry

Something that isn't consumed by the reaction (so say A) is dissolved at the same time as something that is consumed by the reaction (B) in a solvent, so that they are in the same phase...what is this reaction an example of? What is the most pervasive

5a+7a²+3a

41. ## arithmetic

there weree 93 students that split into equal groups of fewer than ten and there two left over how many groups were there

42. ## physics

The position of a mass oscillating on a spring is given by x = (5.6 cm) cos [2πt / (2.03 s)]. (a) What is the period of this motion? (b) What is the first time the mass is at the position x = 0?

Emma has 36 feet of fence. She wants to make the largest rectangular area possible for her rabbit to play in. What length should she make each side of the rabbit pen? Show your work and explain how you found the largest area.

44. ## chemistry

If helium added to the mixture increases the pressure to 1.90 {\rm atm}, what is the partial pressure ({\rm atm}) of the helium?

45. ## Geometry

Write an equation of a line in point-slope form for a line parallel to y = 6x + 2 that contains P ( 5,9).

46. ## Chemistry

How much heat is given off by melting 155 grams of water?

47. ## physics

An object is placed on an inclined plane which forms an angle B = 18º with the horizontal. An external force F of magnitude 14.3 N is applied to the object. The force F acts in a direction which forms an angle A = 62º with the horizontal. As a result of

49. ## Geometry

Indirect Proofs Prove a triangle cannot have 2 right angles. 1) Given triangle ABC. 2) Assume angle A and angle B are both right angles is true by one of two possibilities (it is either true or false, so we assume it is true) This is my first time to do

50. ## Poverty

Why is important to fight against poverty? these people in poverty are characterized by others as being worthless, are rejected, and are made to feel guilty because of their situation. It's important to help these people because their lives have been torn

51. ## Science

What life is like within the ecosystem that the cyanobacterium lives as well as the volcanic island as a whole. Words required to be included in the story are hot spot, tectonic plates, lichen, fungus, algae, symbiosis, photosynthesis, carbon dioxide,

52. ## chemistry

What volume of O2 at 912 mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?

53. ## math

how can you write each improper fraction as a mixed number in simplest form.

54. ## accounting

a partial balance sheet and income statement for King Corproation follow: KING CORPORATION Partial Balance Sheet December 31,2009 Assets Current assets: Cash $33,493 Marketable securities$215,147 Trade receivables, less allowance of $6,000$255,000

68. ## geometry

a rectangle with a length of 32 units and a width of 18 units; find the length of a diagonal.

69. ## Physics

The 1.4 kg, 40-cm-diameter disk in the figure below is spinning at 260 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 4.5 s?

70. ## physics

Two blocks, one 5.0 Kg and the other 2.0 Kg are suspended from a pulley such that the 5.0 Kg block is 4.0 m above the 2.0 Kg block and 5.0 m above the floor. The blocks are released from rest. a. At the moment that the two blocks pass each other, what are

71. ## L.A.

what are some sentences of the word barbarous

72. ## Chemistry

What are the sizes of BCl3, CCl4, NCl3, and Cl2O in comparison to one another. For example BCl3

73. ## physics

A man of mass 61.6 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 15.9 kg and is 2.0 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

74. ## physics

A 2kg. lump of clay traveling at a speed of 20m/s collides with and sticks to a 5kg. lump of clay initially at rest and hanging from a string. Find the final speed of the new lump of clay. How high will the clay swing after the collision? (initial) m1=2kg.

75. ## Anthropology

What are centralized political systems and how do they operate?

76. ## Math

Find the present value of the annuity necessary to fund the withdrawal of $600 per month for 10 years, if the annuity earns 2% per year and if there is to be$10,000 to be left in the annuity at the end of the 10 years. (Assume end-of-period withdrawal and

77. ## U.S history

My two colonies are New Jersey and Pennsylvania.How are they similar and how are they different?Which one would you live in,and why?

78. ## Chemistry

What volume of O2 at 912mmHg and 33 degrees C is required to synthesize 11.0 mol of NO?

79. ## Chemistry

Calculate the temperature change in the water upon complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q =mC*Delta T to calculate the temperature change of the 314 g of water. under the following

80. ## English

I really need to know if my sentences are correct. Thank you very much. 1)Now the reality with which he is confronted fills him with horror and disgust. 2) He is disgusted and horrified by his creation- He rushes from the room and returns to his

81. ## English English plz

please check my work. "Paradise lost" is a very interesting and religious story. The write make a point to describe the unfaithfulness of angles and fall of human from the heaven. The basic theme of the poem is man‘s first disobediently to God. “Of

82. ## physics

2. A hockey player is skating in a straight line at 1.5 m/s. He then increases his speed to 7 m/s in 3 s. What is his average acceleration during this 3 s?

A fair die is rolled 16 times. What is the expected sum of the 16 rolls?

84. ## nonfiction

What does seattle say about integrating white and native american cultures?

85. ## government

Which of the following falls under the authority of Congress?

86. ## Chemistry

What is 17.4 psi converted to atm?

87. ## Chemistry

What is 832 torr converted to atm?

88. ## English

A: What do you think of a solar house. 1. I think the solar house makes money for us. 2. I think we can save energy thanks to the solar house. 3. I think we don't need to spend money on electricity. 4. I think we don't need to pay the electricity fee. 5. I

89. ## physics

Two blocks of equal mass m are tied to each other through a light string . One of the blocks is pulled along the line joining them with a constant force F . Find the tension in the string joining the blocks.

90. ## Spanish

8. ____ ayudan mucho en casa. a. Tú y yo b. Ana y yo c. Ana Maria y él d. Tú Can't decide between A and B 9. "¿Qué bebes en la cena?" "________ leche." a. Bebo b. Bebes c. Beben d. Bebemos C? 10. No me gustan las uvas pero me ______ las manzanas. a.

91. ## physics

Two blocks of equal mass m are tied to each other through a light string . One of the blocks is pulled along the line joining them with a constant force F . Find the tension in the string joining the blocks.

92. ## English

A: What do you think of planting trees? 1. I think it is good for health. 2. I think we can live in better places because of the trees. 3. I think we need to plant more trees to live a healthy life. 4. I think we should try our best to preserve the earth

93. ## physics

crate weighs 823 N rests on plank that makes a 25 degree angle with the ground. Find components of crate's weight parallel and perpendicular to the plank

94. ## elizabeth high school

. An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum required sample size to

95. ## Physics

Use the Second law of thermodynamics to explain why an ice cube cools off your warm soda.

96. ## algebra

Use the intercept to graph the equation x+2y=4

97. ## physics

A 905 kg test car travels around a circular track with a circumference of 3.25 km. If the magnitude of the force that maintains the car's circular motion is 2140 N, what is the car's tangential speed?

98. ## chemisrry

how many atoms of H are ther in 4.3g CH4

99. ## math

find the domain and all the critical points of the function. a) x(the square root of (4-x^2)) The domain is x must be less than or equal to positive or negative two but when i go to do the derivative to find the critical points i always get stuck. can

100. ## Physics

When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.370 m/s2. Block 1 has mass M, block 2 has 5M, and block 3 has 5M. What is the coefficient of kinetic friction between block 2 and the table? block 1 is

101. ## English

1. The energy comes from sunlight. 2. The energy comes from the sunlight. (Which one is right? Do we have to use 'the' or not?)

each time a ball bounces it returns to a height 2/3 the hight of the previous bounce. after the third bounce, the ball returns to a hight of 4ft. from what height was it dropped

103. ## Science

Is there anyway I can create something similar to acid rain for my experiments? Thanks ( I was thinking of mixing water with vinegar and leaving it there for few day)

104. ## English

(1) Are you doing any volunteer work? How about your friends? 1. Yes, I am. They are doing (some) volunteer work, too. 2. No, I'm not. They are not doing (any) volunteer work, either. (2) Do you do any volunteer work? How about your friends? 1. Yes, I do.

a fast growing mushroom doubled in size every day. after 30 days it measured 6in. tall on which day did it measure 1 -1/2 in tall

106. ## statistics

A random samples of 250 bolts manufactured by machine A and 200 bolts manufactured by machine B showed 24 and 10 defective bolts respectively. Test the hypothesis that the machines are showing difference qualities of performance. Use 5 per cent level of

107. ## physics

A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to find Fs,max and Fk if you were to move a 157 kg aluminum sculpture across a horizontal steel platform. Fs,max: Fk:

108. ## algebra

8(4k-4)=-5k-32

109. ## Statistics

Given the following set of numbers: x=7.1, 1.8, 2.1, 1.5, 2.1. Find the median, mean and standard deviation. State the formulas (or procedure) for these values, plug the numbers into the formula and evaluate the results. Compare the mean and median. Which

110. ## chemistry

what state is sulfur dioxide in at 200 k Pa and -100 Celsius

111. ## ALgebra

multiply. (x+2)(x-2)(x^2+4)

112. ## compent

I need two paragraph about how interest rates affect our purchasing decision. identify the topic sentence in each by underlining it.

166. ## history

Why would some people find it wrong to have a woman president for to represent their country?

167. ## College Physics

A 300 kg satellite is orbiting the earth with 20,352 km/h speed. Calculate the orbital radius in km. Assume G=7*(10^-11) N.m2/kg2 and Mass of earth = 6*(10^24) kg

168. ## physics

A particle executes simple harmonic motion with an amplitude of 10 cm and time period 6 s. At t=0 it is at position x=5 cm going towards positive x direction . Write the equation for the displacement x at time t. Find the magnitude of the acceleration of

169. ## physics

A 33 N force acting at 90° and a 44 N force at 60° are applied concurrently at a point P. What is the magnitude and direction of the resultant force?

170. ## Chemistry 101-URGENT

How much heat is required to melt 43.5 g of ice at 0°C?

171. ## AP Chemistry

What is meant by minimum and maximum energy problems. Are there different equations to find them. What does this conceptually mean? * This is dealing with quantum chemistry such as plancks equation, and debroglie equation.

172. ## MATH HELP NEEDED

yfrog./ 9escreenshot25ucj img338.imageshack.us /img338/7823/screenshot25uc.jpg

173. ## Algebra

Please let me know if I figured this out correctly ... 2t + 4 >/= t -t -t 1t + 4 >/= 0 - 4 -4 1t >/= -4 /1 /1 t >/= -4

174. ## ALgebra

multiply 1) (x-3)^3. 2) (2x+y)^3. 3) (3a-2)^3

176. ## physics

In one cycle, a heat engine absorbs 4400 J at 500C and exhausts 400 J. How much work does it do per cycle?

177. ## physics

An ideal gas (volume 1.1m3 , pressure 101500 Pa, temperature 290 K) undergoes an isothermal process during which it absorbs 2000 J of heat. How much did the entropy of the system increase?

178. ## chemistry

The following reaction consumes 2.40 kg of CO, How many total liters of gas are formed at STP?

179. ## Calculus

Evaluate the integral: the integral of [5e^(2t)]/[1+4e^(2t)]dt. I have tried this problem so many ways and cannot come up with the correct answer :(

180. ## Ms.Sue

Yesterday I wasn't able to post so I here I am posting it today for you to check. What are the temporary and longterm effects of STI's? -Chlamydia -gonorrhoea -trichomonas -LGV -Pubic Lice and Scabies -syphilis -HPV -Herpes -Hepatitis B -HIV The temporary

181. ## Geometry

a 31 meter pole breaks and the tip touches the ground 10 meters from the base of the pole. How tall is the part of the pole that is still standing?

182. ## math

If you have 6* 1/10 write this in decimal form? 6* .10 is this correct

207. ## Spanish

2. Nunca como allí porque la comida es ______. a. buena b. horrible c. sabrosa d. malo D? 7. Me gustan los sandwiches de jamón y queso. Son muy _________. a. buenas b. malos c. sabrosos d. horribles C 8. ____ ayudan mucho en casa. a. Tú y yo b. Ana y yo

223. ## accounting -annual amount

The exhaust-gas temperature leaving a continuously operating furnace is 260°C, and a proposal is being considered to install a heat exchanger in the exhaust-gas stream to generate low-pressure steam at 105°C. the question to be investigate is whether it

224. ## Math: Need Answer to study for a quizz. Help ASAP

Estimate the area under the curve f(x)=x^2-4x+5 on [1,3]. Darw the graph and the midpoint rectangles using 8 partitions. Show how to calculate the estimated area by finding the sum of areas of the rectangles. Find the actual area under the curve on [1,3]

225. ## accounting -annual amount

The exhaust-gas temperature leaving a continuously operating furnace is 260°C, and a proposal is being considered to install a heat exchanger in the exhaust-gas stream to generate low-pressure steam at 105°C. the question to be investigate is whether it

226. ## physics

A girls sits on a tire that is attached to an overhanging tree limb by a rope. The girl's father pushes her so that her centripetal acceleartion is 3.8 m/s2. If the length of the rope is 3.3 m, a) what is the girl's tangential speed? b) If the magnitude of

227. ## Direct Labor: Variable or Fixed Cost?

Throughout the corporate world, businesses are transforming labor into a more flexible (and variable) cost. Among such companies are Hewlett-Packard, General Electric, DuPont, Sun Microsystems, and British Airways. Discuss whether direct labor is a fixed

228. ## Downsizing and Fixed Costs

Industry downsizing has been a major part of the corporate world, even government agencies are downsizing. GovernmentExecutive website "covers the business of the federal government and its huge departments and agencies - dozens of which dwarf the largest

write down five" th"words/

230. ## chemistry

25.5g C7H11NO7S (4-nitro-2-toluenesulfonoic acid dihydrate) in 1.00*10^2g H2O (nonionizing solute)

265. ## successful writing at work

2. a. student ID number- not on resume b. social security number – not on resume c. the Zip code of your references’ addresses d. a list of all your English courses in college e. section numbers of the courses in your major f. statement that your are

266. ## Chem

I've been having trouble setting up word problems. Here is one problem I need help with. How many Bromide ions are in a sample of CaBr2 that has a mass of 10.0g?

267. ## Tx. History

What was the American experience?

268. ## Calculus

The volume of a cone of a radius r and height h is given by V=(3.14/3)(r^2)(h). If the radius and the height both increase at a constant rate of .5 cm per second, at what rate, in cubic cm per second, is the volume increasing when the height is 9cm and the

269. ## Calculus

1)Find the particular solution of the differential equation xy'+3y=80xlnx (x>0) satisfying the initial condition y(1)=4 2)Find the particular solution of the differential equation y'−1y=−5x+3 satisfying the initial condition y(0)=3.

270. ## being kind

why is being kind important. justify your response. is being kind important because it allows others to feel good about you and you to feel good about yourself?

271. ## Physics

Block B in the figure below weighs 713 N. The coefficient of static friction between block and table is 0.20. Assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.

272. ## Chemistry

help please! At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.75 atm and 0.30 atm, respectively?

b=a+4

274. ## Spanish

Can you make a negative command and another command (negative or affirmative) with a double object pronoun. They are in a writing about why tattos are in fashion and what they want to express.

275. ## physics

A ball is thrown straight upward and returns to the thrower's hand after 2.20 s in the air. A second ball is thrown at an angle of 31.0° with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one thrown

276. ## physics

Find the work for an isothermal expansion of 3.08 mol of an ideal gas at temperature of 18oC from pi = 4.55 atm to pf = 3.32 atm.

277. ## HCR 220

How do effective medical compliance plans limit the risk of professional liability?

278. ## psy210

In the 1970s, approximately __________ of American couples reported that they cohabitated before getting married; in the year 2,000, approximately __________ reported that they had cohabitated before getting married.

279. ## physics

1.7 mol of an ideal gas which starts at 1.6 atm and 50 o C does 2.0 kJ of work during an adiabatic expansion. What is the final volume of the gas?

280. ## physics

If 842 J of heat is needed to increase the temperature of ethane gas (C2H6) in a 15 litre container from 237 K to 400 K, how much gas is in the container

281. ## Physics

lead melts at 328 degrees C. lead has a heat of fusion of 2.04X10^4 J/kg and a specific heat of 130 J/kgK. how much heat must be removed from 0.50 kg of molten lead (liquid) at 328 degrees C to make it all a solid chunk at 300 degrees C?

282. ## english

root word :lantry The definition of root is: worship A word using this root is: autolantry the definition of autolantry ,I cant find it ,can you help me look it up the definition or find another word using the root .thank you

283. ## chemistry

How much heat is gained in joules by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 12 C

284. ## Chemistry

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the

285. ## physics

two air carts of mass m1=0.87kg and m2=0.48kg are placed on a frictionless track.cart 1 is at rest initally, and a spring bumper with a force constant of 690N/m. cart 2 has a flat metal surface for a bumper, and move toward the bumper of the stationary

IT HAS ONLY 2 DIFFERENT DIGITS,BUT THEY REPEAT.THE DIGITS APPEAR IN THE SAME ORDER IN BOTH PERIODS.THE SUM OF THE DIGIT IS 20.THE ONES DIGIT IS 5 MORE THAN THE TENS DIGIT.

287. ## chemistry

what is the hybridization of BrO2+

34x(nx2)=680

289. ## chemistry

if i have a molar concentration of acetic acid.046 mol/L how do i get the calculated molar mass of acetic acid

290. ## physics

a banana with a temperature of 17 degrees C (specific heat of banana= 3520j/kgK) and a a mass of 250g is placed in a bowl of milk with a temperature of 8 degrees C and a mass of 350g (specific heat of milk= 4200 J/kgK). no heat is lost to the bowl or the

291. ## physics

"Calculate the internal energy for the air in human lungs after a regular inhalation. You find this volume discussed in the context of the spirometer (textbook p. 203). Hint: treat air as an ideal gas with the molecular mass M = 29.00 g/mol " Not sure the

292. ## physics

A container of volume 14.2 cm3 is initially filled with air. The container is then evacuated at 0oC to a pressure of 32 mPa. How many molecules are in the container after evacuation if we assume that air is an ideal gas?

293. ## Physics

How much heat must be added to 3kg of liquid water at 25 degrees C to change it into steam at 120 degrees C?

294. ## pre calculus

simplify sin(2 pi/3+x)

295. ## geography

Do you know where I can find an article no older than 2 years about economics in latin america? thank you

296. ## L.A.

what is the definitons of the word analyical and can anyone help me use it the word in a sentence.I try to lok on the wed but i could not find the word.

297. ## Physics

Find the heat necessary to change 2.5kg of water (ice) at -2 degrees C to steam at 105 degrees C. specific heat ice= 2060 specific heat water= 4180 specific heat steam= 2020 heat of fusion= 3.34X10^5 heat of vaporization= 2.26X10^6

298. ## college

the perimeter of a rectangle is twice the sum of its width and it length. the perimeter is 40meters and its lenght is 2 meters more than twice its width.

299. ## mathzzz

3(-9) whats the answer would it be 28-

300. ## science

explain why a single5 500 kg block of granite weathers much more slowly than 100 chunks of granite weighing 5 kg each.

301. ## Algebra

0 = 2x^3 + x - 3 solve for x

302. ## physics

Suppose I have a spring. I add a mass (m = 1.0 kg) and it is displaced by 15 cm. What is the spring constant k in units of (N/m)?

303. ## us history

Think about two colonies.How are they similar?How are they different?Decide which colony you would like to live in.

304. ## physics

How much work must you do to push a 13 kg block of steel across a steel table (\mu_{{\rm k}}=0.6) at a steady speed of 1.3 m/s for 2.6 s?

305. ## Physics

A bicycle wheel of radius .7m is rolling without slipping on a horizontal surface with an angular speed of 2 rev/s when the cyclist begins to uniformly apply the brakes. The bicycle stops in 5 s. Through how many revolutions did the wheel turn during the 5

306. ## Logic

What would happen if Pinochio (I don't think i spelt that right) said "My nose will grow"? Please help me figure this out!

307. ## Physics

I have a spring on a horizontal frictionless surface. Initially it is un-stretched and at x = 0 cm. I then pull it back 10 cm and release it. What is the amplitude of the oscillations (the object has mass m)?

308. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

309. ## chemistry

A metal sample weighing 45.0 g and at a temperature of 99.1 degrees Celsius was placed in 38.6 g of water in a calorimeter at 25.0 degrees Celsius. The calorimeter reached a maximum temperature of 32.8 degrees Celsius. what was the delta t of water? what

310. ## Chemistry

convert @5g of NaCl into moles