Questions Asked onApril 26, 2011

1. chemistry

what is the meaning of the numeral represented by X in the general formula for hydrate salt * XH2O

2. Algebra

In chemistry, n molecules of an ideal gas have pressure (P), volume (V), and temperature (T) that stand in the following relation, where R is a constant. PV = nRT If you solve for n what would be a good equation? I came up with n=PV/RT Some other choices

3. Chemistry

Barium sulfate forms as a precipitate in the following reaction: Ba(NO3)2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaNo3 (aq) When 35.0g of Ba(nO3)s is reacted with excess Na2SO4, 29.8g of BaSO4 is recovered by the chemist. a) Calculate the theoretical yield of

4. physics

Wayne pulls a 305 N sled along a snowy path using a rope that makes a 45.0° angle with the ground. Wayne pulls with a force of 42.3 N. The sled moves 16 m in 3.0 s. What power does Wayne produce?

5. Speech

After analyzing a problem, what is the next step in the problem-solving process? a. Develop creative solutions. b. Identify possible solutions. c. Select a solution. d. Implement a solution. I think it might be B

6. food economics

what are the 3 other names by which animal proteins are called?

7. algebra

how long is the diagonal of a 12mm-by-16mm face of a rectangular prism?

50. Chemistry

# Electron Pairs # Lone Pairs Electronic Geometry Molecular Geometry Lewis Structure Sketch of Shape I need to do the above things for SBr6 and BrCl5. If anybody can help that would be great!

51. Math

Eleven members of the team gave each other "high fives". If each player gave each teammate a high five, how many high fives would be given altogether?

52. Finance

Temple Corp. is considering a new project \vhose data are shown below. 'rhe equipment that would be used has a 3-year tax life, would be depreciated by the straight-line method over its 3-year life, and would have a zero salvage value. No new working

53. The America Vision History, Glencoe Edition

I WAS WONDERING IF SOMEONE CAN TELL ME WHERE I CAN READ AND OR REVIEW A HICHSCHOOL STUDENTS HISTORY BOOK, THE FULL TEXTBOOK ONLINE FOR FREE. THE BOOK THAT I AM TRYING TO FIND TO READ ONLINE IS: The American Vision History Book, Glencoe Edition is what it

54. Chemistry

How do I calculate the amount of heat needed to convert 96g of ice at -24 degrees celciua to water at 28 degrees celciua?

55. human life

What are the human and environmental factors that cause ill-health,sickness,trauma,accidents,crises and disasters in South Africa

56. math (pre calc)

4cot^2x-4/tanx+cosxsecx write expression in factored form as an algebraic expression of a singletrig function

57. Math

Using the arrangement of letters in the margin, compute the number of paths that spell the word MATHEMATICS if all paths must start at the top and move diagonally down through the letters. M A A T T T H H H H E E E M M M M A A A T T I I I C C S I only got

58. Chemistry

Calculate the amount of sodium acetate trihydrate needed to prepare 100 mL of 0.2M sodium acetate solution.

59. math

4cot^2x-4/tanx+cosxsecx factorin algenraic single trig function

60. Physics 203

A satellite with a mass of 310 kg moves in a circular orbit 7.00*10^7 m above the Earth's surface. (a) What is the gravitational force on the satellite? (b) What is the speed of the satellite? (c) What is the period of the satellite?

61. Physics 203

An object is projected upward from the surface of the Earth with an initial speed of 4.6 km/s. Find the maximum height it reaches.

62. calculus

The function f is twice differentiable, and the graph of f has no points of inflection. If f(6)+3, f'(6)=-1/2, and f"(6)=-2, which of th following could be the value of f(7). A.)2 B.)2.5 C.)2.9 D.)3 E.)4 the answer is A. but what are the steps to reach

63. Chemistry

How do I calculate the amount of heat needed to convert 96g of ice at -24 degrees celciua to water at 28 degrees celciua?

64. 10th grade chemistry

How many grams of CuSO4.5H2O are needed to prepare 100. mL of a 0.to M

asked by Angelica Martinez
65. trig

The lengths of 2 adjacent sides of a parallelogram are 42 cm and 36cm. an angle of the parallelogram is 4o degrees. Find the measure of the longest diagonal to the nearest tenth of a centimeter.

asked by ashley --
66. Grade 11 Math

A rectangular dog run is to be enclosed by a fence and then divided into two smaller rectangular areas by a fence parallel to one of the sides. If 54m of fence is available, find the dimensions of the dog run of greatest possible area. State the total area

67. Physics

A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 13m/s when the hand is 2.3m above the ground, how long does it stay in the air?

68. Maths

The first year after 1999 which is the product of three consecutive integers is: 2004 2040 2046 2052 2184 Please show working out and choose either one of these years

86. science

improper functining or regulation of which of the following might lead to poor regulation of membrane permeability? 1.albumin 2.fibrinogen 3.platelets 4.lymphocytes 5.chloride ion levels

87. Anatomy

A number of antibiotics act by binding to certain essential enzymes in the target bacteria. How might these antibiotics influence the chemical reaction controlled by the enzyme? What might be the effect on the bacteria? On the person taking the antibiotic

88. physical chemistry

find the ph of the solution that results from the addition of 25ml of 0.1mol/l NaOH solution to 50ml of 0.1mol/l HCL solution?

89. Geometry

The ratio of the volume of cube A to the volume of cube B is 64 to 27. Use this information to determine the ratio of the length of a side of Cube A to the length of a side of cube B.

asked by Nicole G.
90. Trig

a clock has a diameter of 1 foot what is the angular size if viewed from a distance of 27 feet

91. teacher

Which machine would you use to protct a graphic display? A spiral binder b pantograph C laminator D dry-mount press I would say C, but I also like d too. Can someone help me.

92. MATH

TWO NUMBER CUBES AREROLLED AT THE SAME TIME . WHAT IS THE PROBABILITY THTA BOTH NUMBER CUBES WILL SHOW AN EVEN NUMBER

93. Algebra

Use Gauss-Jordan to solve 3x + 2y = -4 4x – 2y = -10

100. Algebra

The sum of two numbers is 68 and the difference is 10. What are the numbers?

101. Math

Could someone answer this so I understand it. Thanks The projected rate of increase in enrollment at a new college is estemated by dE/dt = 9000(t+1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 5000 now (t=0), find the

102. Sociology

Can someone help me with my three questions and let me know if I answered them correctly Thanks 1 According to world systems analysis, the U.S., Japan, and Germany are all core nations. I chose (true)=A A) True B) False 2) Which population group represents

103. Spanish

15. "¿Qué debemos hacer para ayudar el medio ambiente?" "Creo que ______ protegerlo." a. vale la pena b. tenemos c. vamos d. forma parte Not sure.. 16. Gregorio _____ tocar la guitarra. La toca muy bien. a. sabemos b. sé c. saben d. sabe C or D 18.

104. teacher aide

Need help! If you're preparing a bulletin board, how many ideas should you try to get across at one time? A One B Two C Four D As many as possible I think A one, but I can't seem to find it anywhere. Can someone plz help.

105. algebra

A rectangle with sides 8 cm and 6 cm and one with sides 10 cm and 9 cm. Find the ratio of the perimeter and the areas of each pair of figures.

106. Math

Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).

107. Math

Use algebra and the properties of limits as needed to find the limit. If the limit does not exist, say so. (→ − ∞)lim: 9x^2+5x-17 / 5x^3+12x^2+21

108. ah trig help

use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u

109. math

when adding and subtracting integers does 2 negatives equal a positive? And does 1 positive plus 1 negative number equal a negative?

110. Math

An indoor track is shaped like a rectangle with a semi-circle on each end. The distance around the track is 200 yards. Find the maximum area enclosed by the track.

111. geometry

Which of the following does not always bisect at least one side?

asked by Schurz high school
112. Physics

A 10-kg ladder 2.5m long rests agaist a frictionless wall with its base on the floor 80cm from the wall. How much force does the top of the ladder exert on the wall?

113. physics

An engine moves a boat through the water at a constant speed of 16 m/s. The engine must exert a force of 7.0 103 N to balance the force that water exerts against the hull. What power does the engine develop? answer:___ kW

114. Economics

Explain two ways the Office of Fair Trading can protect the interests of consumers?

115. chemistry

the normal concentration of sodium chloride in blood is 0.9%(w/v). therefore assuming a FW for NaCl of 58.4 g/mole, an isotonic 0.9% (w/v) saline solution would have how many mili-equivilents per liter (mEq/L) of Na+ ions?

116. Chem

How much heat will be produced when 16grams of C2H6 burns? The reaction is 2 C2H6 + 7 O2 --> 4CO2 + 6 H20 triangle heat = -350kJ

117. Math

What are the following numbers rounded to the nearest thousandth: 0.00673, 63.4982, 4.8919, 5.9198.

118. chemistry

I- is converted into I2 by the addition of an aqueous solution of KMnO4 to an aqueous solution of KI. What is the oxidation number assigned to I2??

119. chemistry

calculate the percent composition of the compound that forms when 222.6 g nitrogen combines completely with 77.4g oxygen.

135. Math

How do you write this as an algebraic inequality ? "Three times a number decreased by seventeen is less than or equal to eight."

136. arithmetic

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue $320 John$300 Mike $220 Betty$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

137. math

if anna drew a circle that has an area of 153.86 square meters what is the radius of anna's circle

138. Physics

an object that is 6 cm in height is put 9 cm from a convex lens. The lens has a focal length of 8 cm. What is the size of the image?

139. statistics

In prior investigations made by a local Gas and Electric Company, 65% of homeowners prefer to heat with gas instead of electricity. In a recent study of 200 homeowners 60% prefer heating with gas. In a two tailed test at a .05 level of significance can we

140. pre calc

cos2x=cosx in interval of [0,2pie]

141. Statistics

According to the U.S. Federal Highway Administration, the mean distance traveled per shopping trip by Americans was 10.0 miles in 1983. A random sample of 25 shopping trips for this year gave a mean distance traveled of 12.0 miles with a population sample

142. Physics

Calculate  the  length  of  a  meter  stick  moving  with  a  speed  of  v  =  0.9995c  as  measured  by  an   observer  at  rest.

143. social studies

why they are grouped in one community?write at least threereasons. (1)christine. (2)hindu.(3)muslims.(4)sick.

asked by abdul moiz

183. Math

How would i change x-4y= -20 to slope intercept form?

184. math

factory completely 21y^2+38+5

185. probability

a bag of 100 marbles contains 30 blue, 25 green, 25 mixed,and 20 clear. what is the probality of selecting a blue? ablue and green? a marble that is not clear? ablue on the first draw and a clearon the second draw? a

186. Physics

user-generated content: report abuse What approximate change in decibels does an observer experience from a sound source if the observer moves to a new location that is 67% as far from the source? My answer choices are 23, -23, 40, 2.76, -2.76, 1.94,

187. physics

In the figure , the total resistance is 13.0 k \Omega, and the battery's emf is 32.0 V. If the time constant is measured to be 40.0 \mu s. Calculate the total capacitance of the circuit.

188. physics

A laundry detergent contains a three-level quantum system ("whitener") which absorbs ultraviolet light at 273 nm. It emits light at 597 nm as part of a two-step process . What is the wavelength of the second emission process?

189. math

factor completely 7y^2+22y+3

190. math

how do I determine the compounding rate required to turn $350 into$14,000 over 30 years? Thank you

191. social studies class 2

why hindu are grouped in one community?write at least three resons.

asked by abdul moiz
192. Math

solve the equations algebraically x^2 + y^2 = 25 3y - 4x = 0

193. History

Is it okay to end an essay with a rhetorical question?

194. MATh

Number of Cans of Corn Cost 3 $1.95 5$ 3.25 6 $3.90 9$5.85 Write an equation to represent the data how do i do that

195. Psychology

Survey results may be inaccurate due to: a participants not wanting to tell the truth b the bias of respondents c the use of a represntative sample d failure of most statistical procedures in analyzing the results of surveys. This really has me stumped as

196. arithmetic

Write a rule for the nth term of the arithmatic sequence. Then find a10. 1. -4,2,8,14,20 2. -25,-29,-30,-37,-41

197. math

how to convert cm3 to liters?

198. child care

windows of time during which enviorment influences on development are enhanced are called blank periods? a.sensitive b. critical c. crucial d. necessary i say c?

199. Social Studies(child Labor)

what is the right spelling for child labor did i spell child labor right or it is child labour i think the right spelling is child labor in google i saw a spelling like child labour

200. science

when would we use parsec, astronomical unit or light year? how would you determine which is the best to use?

201. Physics

Glass of water has mass of 240g at room temp (25°C). Add 50g of 0°C ice. What final temp after ice is melted. (at equilibrium).

202. physics

An atom absorbs a yellow photon in the transition from its 2s to its 3s state (see figure on the left, not drawn to scale). What color photon might it emit in a transition from the 3s to the 2p state?

203. Algebra

Equation S=-16t^2 +100 write equation t^2 =

204. Math

Women’s records in the women’s 1500-m run. The formula R =−0.0026? + 4.0807 can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will

205. chemistry

how many ml of a 2M solution of HCl would be needed to neutrilize 2ml of a 5M solution of KOH?

206. Persuasive Writing

Hello! I was wondering if you had any ideas for a persuasive writing assignment. Thanks! All help is adored! :D Thanks! From: Natila' Scharum

207. statistics

Compare Distribution A (Female Shoulder Girth) and Distribution B (Male Shoulder Girth) shown below. What can we conclude about these distributions based on the histograms?

208. MATH

If someone told you the depth in Lake superior was 1,333ft, would it be expressed as mean, median, mode, or range

209. Math

Could someone answer this question so I understand it. Thanks Find the indefinite integral. x/ã3x^2+4 dx = Simplify the answer. Use C as the arbitrary constant.

210. math

name a multiplication fact that can help you with 8x4, and tell how

211. s.s (social studies)

can you help me translate the declaration of independence? first passage: When in the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the

212. Algebra

find the LCM of 6y^6and 12y^8

213. chem

Suggest a synthesis for olivetol from benzene and any necessary organic and/or inorganic reagents.

214. algebra

How do I solve -6x-12>-18 Thanks in advance for the help.

215. trig

finding the period of a graph given a equation y=-5sin1/3(x-pi/2)

asked by ashley --
216. geometry

In a Kite the sides are x,5,2 and 3 what is the value of x?

217. religion

Hello, I am having trouble locating online Kohlbergs theory and spiritual formation with moral reasoning thanks

285. social studies

Nepal is a country of full of geographical diversities

286. math

need help with the setup on this problem.. if something grows @ 10% per year how long would it take to go from 100 to 300?

287. computers

in a business report, what spacing should you use between lines?

288. medical terminalogy

Some technical terms pass into common usage as knowledge about a field spreads Think of three such terms that have passed into common usage recently?

5/11 + 4/9

290. History

IS WWII and The holcaust too diferent things or did the holcaust happen during WWII

1 kg= g

292. english

in english we have to make an album of 6 songs that relate the the play, the tragedy of julius caesar. one for each act and then one that summerizes the main theme of the play. please help

293. college algebra

Shellie pays $4.00 for a square piece of wood, which she makes into a stop sign by cutting the corners off. what is the cost of the wasted part? I don't even know where to begin? do I take$4.00*1/8....which equals half and subtract that from

294. writing

thesis statement for public transporation

295. science

What is the current produced by a potential difference of 240 volts through a resistance of 0.2 ohms?

296. MATH

A state sales tax is levied at a rate of 7.5%. How much tax would one pay on a purchase of \$550.

asked by Marissa G.
297. organic chem

(1) Isobutyraldehye + formaldehyde + NaOH/H2O → II (C5H10O2) what is the structure?

298. math

what is 5 divided by -4?

299. math

what is 20 plus a -3?

(8+ )*m=5m