Popular questions and responses by Shadow
  1. Chemistry

    If 3.21 mol of a gas occupies 56.2 L at 44*C and 793 torr, 5.29 mol of this gas occupies __________ L under these conditions. . -How will I solve this using PV= nRT? I tried using PV= nRT. By just plugging in the value and got 131 but the answer is around

    asked on April 1, 2013
  2. Math

    A 64 inch long board is divided into lengths in the ratio 2:3. What are the two lengths into which the board is divided? Thanks

    asked on March 7, 2011
  3. chemistry

    Hydrogen gas can produced by the reaction between metallic aluminum and aqueous hydrochloric acid 2Al+6HCl----2AlCl3+3H2 Hydrogen gas produced by this reaction is typically collected via water displacement, during which time the hydrogen gas becomes

    asked on November 19, 2013
  4. math

    If a number is not a rational number, then it is _____. (1 point) a integer a rational number a whole number

    asked on September 26, 2017
  5. Chemistry

    Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 - Enthalpy is 160.9 kj H2 + 1/2O2 = H2O - Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 - Enthalpy is 288.6 I try using Hess Law but cannot solve it.

    asked on May 13, 2013
  6. Chemistry

    Determine the volume of methane CH4 gas needed to react completely with 0.660 L of 02 to form methanol CH3OH I'm confused because I'm sure CH4 + O2 don't give you CH3OH. Thanks

    asked on March 29, 2013
  7. Social Studies

    1.Why is " elastic clause' an appropriate name for Clause 18 of Section 8 of Article l? 2.Think about what it mean to "express" something. Which powers - delegated or implied - could also be referred to as expressed powers? Why? 1.Elastic Clause is the

    asked on April 11, 2010
  8. chemistry

    In the following reaction, how many liters of carbon dioxide, CO2, measured at STP, would be produced from the decomposition of 143 g of magnesium carbonate, MgCO3? MgCO3----MgO+CO2

    asked on November 19, 2013
  9. Algebra

    A gardener is putting a wire fence along the edge of his garden to keep animals from eating his plants. -If he has 20 meters of fence, what is the largest rectangular area he can enclose? -What quadratic function represents the area of the garden? Thanks

    asked on December 1, 2011
  10. chemistry

    Question: When a pink aqueous solution of potassium permanganate, faintly acidified with dilute sulfuric acid was treated with 10% aq. hydrogen peroxide, the reaction took place with the evolution of gas bubbles, and the pink solution was turned colorless.

    asked on May 5, 2011
  11. Math

    State whether each expression is a polynomial. If the expression is a polynomials, identify it as a monomial,a binomial, or a trinomials. 1.7a^2b+3b^2-a^2b 2.1/5y^3+y^2-9 3.6g^2h^3k Are these the right answers? 1.Yes-trinomials 2.No 3.Yes- monomials.

    asked on May 9, 2010
  12. chem

    Calculate the amount of heat required to convert 17.5g of ice at -33.5∘C to steam at 100.0∘C.

    asked on April 23, 2014
  13. Chemistry

    H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.

    asked on January 13, 2013
  14. Algebra

    The volume in cubic feet of a Cd holder can be expressed as V(x)=-x^3-x^2+6x, the depth is 2-x , factor the polynomial to find linear expression for the height and the width. - Do I just factor the -x^3-x^2+6x? It because I know the volume is LWH, so don't

    asked on February 7, 2012
  15. Algebra

    Suppose f(x)=2x-5 and g(x)= |-3x-1|. Find each value. f(1)+g(2) How would I solve this problems? If anyone could give me the step, thanks a lot.

    asked on October 18, 2011
  16. Physics

    A playground is on the flat roof of a city school, hb = 5.70 m above the street below (see figure). The vertical wall of the building is h = 6.90 m high, to form a 1.2-m-high railing around the playground. A ball has fallen to the street below, and a

    asked on December 14, 2018
  17. math

    which solid does the net form? hexagonal prism hexagonal pyramid rectangular prism rectangular pyramid

    asked on December 5, 2017
  18. Precaculus

    tan4.7 * cot4.7 I understand tan4.7 = 1/ cot 4.7 but I'm stuck after this thanks.

    asked on March 6, 2013
  19. Chemistry

    The problem ask what is the mass of iron(iii) chloride contains 2.35 x 10^23 chloride ions. I understand the molar mass is 162.20 g/mol. - 2.35 x 10^23 chloride ions would be around 0.39 moles. - The work that my teacher gave me is 0.39 moles * (1 mol

    asked on January 29, 2013
  20. Chemistry

    How many moles of ion are in the following? A. 0.0200 g AgNO3 - Could someone give me the step to solve such problems? Thanks

    asked on January 29, 2013
  21. Algebr

    Each week you must do a minimum of 18 hours of homework. Participation in sports requires at least 12 hours per week. You have no more than 35 hours per week in total to devote to these activities. - Write a system of inequalities to model the situations.

    asked on November 13, 2011
  22. Math

    The length of a rectangle is 5 cm greater than it width. The perimeter is 58 cm. What are the dimension of the rectangle? I know the formula for Triangle Perimeter is 2(L+W) and the L is +5 more than the W but I can't write the equation for it. This is

    asked on September 1, 2011
  23. L.A

    Could someone help me interpret this poem?Thanks Nature's first green is gold, Her hardest hue to hold. Her early leafs a flower; But only so an hour. Then leaf subsides to leaf. So Eden sank to grief, So dawn goes down to day. Nothing gold can stay.

    asked on May 3, 2010
  24. Math

    A standard deck of playing cards contains 52 cards in four suits of 13 cards each. Two suits are red and two suits are black. Find each probability.Assume the first card is replaced before the second card is drawn. 1.P(black,queen) 2.P(jack,queen) How

    asked on February 10, 2010
  25. Social Studies

    1. What caused the settlement of African Americans in the Mississippi Alluvial Plain region than in the Ozark Mountains region. Slavery and Plantation . Mining and logging . The use of modern technology. Low priced land and modern technology. 2. Why did

    asked on February 13, 2019
  26. JAVA

    Using only one "System.out.print" command, print the following quote. Make sure to include the quote marks (") in your output. "I do not fear computers. I fear the lack of them." Isaac Asimov

    asked on December 14, 2018
  27. social studies

    Which of the following best describes the similarity between emerson's and thoreau's central beliefs? A.They both lectured on the importance of the inner light B.they both believed the human spirit was reflected in nature C.they both considered the rise of

    asked on November 2, 2017
  28. math

    Which of these nonterminating decimals can be converted into a rational number A 0.48907542 repeating B 0.02020202 repeating C 0.92589542 repeating D 0.10203040 repeating

    asked on September 26, 2017
  29. math

    find the length of the hypotenuse of a triangle with legs of 5 ft and 12 ft? 11 ft 13 ft 17 ft 60 ft

    asked on September 26, 2017
  30. social studies

    which of the following statements best reflects the rights of citizens that are protected by the bill of rights

    asked on September 21, 2017
  31. Chemistry

    Calculate the grams of oxygen gas present in 2.5 L sample kept at 1.66 atm pressure and a temperature of 10 C. - I got 5.72 grams Determine the volume of oxygen gas needed to completely combust 0.202 L of Butane(C4H10). -I got 1.31 L O2. -Thanks

    asked on March 31, 2013
  32. Chemistry

    Water has an extremely high boiling point compared to other compounds of similar molar mass because of ? Hydrogen Bond Adhesive force Covalent bonding Dispersion Forces I believe the answer is A since hydrogen bond is a strong bond and thus require most

    asked on March 10, 2013
  33. Chemistry

    I need to write a balance equation of the decomposition of aluminum carbonate. I know the starting "reactant" is Al2(CO3)3 but would the "product' be 2Al + 3(CO3) ? Thanks

    asked on February 18, 2013
  34. Chemistry

    Because the mass of the reactants equal to the mass of the product of a reaction, the number of moles will be conserved. -I think this is sometime true but I don't know a way to prove that it sometime true. Anyone got an idea ? Thanks

    asked on February 10, 2013
  35. Chemistry

    Let say Pb(NO3)2 combine with FeCl3, would this yield PbCl + Fe(NO2)3? Thanks

    asked on January 27, 2013
  36. Math

    The metric ton of CO2 product per gallons of gas can be calculated with the following. 8.78 x 10-3 metric tons of CO2 are emitted per gallon of gas. Let say the gallon of gas is 1288. Would the CO2 produced be around 11.3 tons? Thanks

    asked on January 22, 2013
  37. Chemistry

    Would this be a double or single replacement and why? Thanks Na2O2 + H2O -> NaOH + O2 Would it be single since the Na is pair with H?

    asked on December 18, 2012
  38. Algebra

    For which value of b would make the equation 3|x-2|=bx-6 have infinitely many solutions? How would I find the values? The choices are -6,-3,3,6.

    asked on October 23, 2011
  39. Shadow

    Write an equation to solve each problem. The sides of one cube are twice as long as the sides of a second cube. What is the side length of each cube if the total volume of the cubes is 72 cm^3? Would it be, 3x+6x=72? Thanks

    asked on September 1, 2011
  40. Geometry

    Use the Law of Detachment to write a valid conclusion for the given information. 1.If two angles are supplementary, then their measures have a sum of 180. 2.Angle X and Angle Y are supplementary. Would the conclusion be this? Thanks -The sum of X and Y is

    asked on October 17, 2010
  41. Math

    Determine whether the following statements are always,sometime, or never true.Explain 1.Three points determine a plane. 2.The intersection of two planes can be a point. 1.Never true, the three points must be noncollinear. 2.Never true, the intersection of

    asked on October 6, 2010
  42. Science

    How sediments,fossil, and ice core record Earth's geologic history? It record Earth's geologic history by giving scientist an idea of when certain climates or events happen.(Is this a good answer?) Thanks

    asked on October 6, 2010
  43. Math

    Through a given point on a line, there is one and only one line perpendicular to the given line. The hints that it gave was "Do not limit your thinking to just two dimensions". If it just a regular line there will only be one perpendicular line right?

    asked on September 9, 2010
  44. Social Studies

    Congressional committee must pass along every bill to be debated and voted on by the other members of their respective houses. Is this true or false?

    asked on April 18, 2010
  45. Social Studies

    1.Do you think the special powers of the Senate or those of the House of Representatives are more important? What is this question asking me? It is asking me who power do I think is more important between the Senate and the House of Representatives? Thanks

    asked on April 11, 2010
  46. Math

    Express each statement using an inequality involving absolute value.Do not solve. 1.The majority of grades in Sean's English class are within 4 points of 85. 2.AA thermometer is guaranteed to give a temperature no more than 1.2F from the actual

    asked on March 17, 2010
  47. Math

    1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

    asked on February 17, 2010
  48. Math

    1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?

    asked on February 17, 2010
  49. Chemistry

    Determine the mole fraction of acetone in a solution prepared by adding 0.456 kg of (CH3)2CO to 0.899 L of C4H8O. Molar Mass (g/mol) (CH3)2CO 58.05 C4H8O 72.12 Density (g/ml): (CH3)2CO 0.7899 C4H8O 0.8892 Name/Formula: acetone (CH3)2CO tetrahydrofuran

    asked on February 14, 2010
  50. Language Arts

    In the third stanza of the poem, which lines rhyme?

    asked on March 3, 2020
  51. math

    Six times the sum of a number and 16 is at most 27. Use the variable y for the unknown number.

    asked on November 18, 2019
  52. Precalculus

    How do i solve this problem? Find the polar form of the complex number where the argument satisfies 0≤θ≤2π. 0+3i

    asked on January 26, 2019
  53. Math

    Emilio has 8450 trees to plant in rows on his tree farm he will plant 125 trees per row how many full rows of trees will he have explain

    asked on May 8, 2018
  54. math

    Match the term with it's meaning real numbers irrational numbers rational numbers integers whole numbers natural numbers radical square root perfect squares cube roots terminating decimals repeating decimals truncate radicand a decimal which can be

    asked on April 17, 2018
  55. Social Studies

    Why did the United States become involved in Mexico's civil war? Select all that apply. 1)Relations had weakened between the United States and the new government. 2)Mexico was unable to end the war without U.S. intervention. 3)The United States provided

    asked on January 31, 2018
  56. social studies

    Which factor best accounts for the price change in the Model T automobile? A. Low deman B. Orginized labor C. Mass production D. wartime inflation

    asked on December 16, 2017
  57. math

    What is the surface area of the given figure. A.) 1,008 cm B.) 1,728 cm C.) 1,392 cm D.) 1,216 cm

    asked on December 5, 2017
  58. math

    sara needs to cover the top and sides of the cylinder below About how many square inches of paper will Sara need? 528 in. 415 in. 207 in. 179 in.

    asked on December 5, 2017
  59. science

    A powerpoint about four landforms

    asked on November 14, 2017
  60. social studies

    Which of the following laws would the free-soil party have supported? cottonocracy slave codes wilmot proviso fugitive slave act ms sue i don't want a link

    asked on November 12, 2017
  61. Language

    I have to write a essay and I don't know how to lengthen the rough draft could someone please give me tips? Here's my rough draft Comparison-and-Contrast Essay The Story-Teller and The Drummer Boy of Shiloh Comparison and Contrast means to tell the

    asked on November 10, 2017
  62. social studies

    We hold these truths to be self-evident: that all men and women are created equal; that they are endowed by their creator with certain unalienable rights; that among these are life, liberty, and the pursuit of happiness what founding documents is being

    asked on November 2, 2017
  63. social studies

    what is this drawing of a camp meeting likely illustrating? A. the growth of reform movements in the united states B. the large influence revivals had on americans C. the rise in the formation of women's trade unions D. the increase in support of american

    asked on November 2, 2017
  64. social studies

    How did Horace Mann contribute to the reform in education? A. His development of books with raised letters aided in the education of the blind B. His educational philosophy led to a new approach in educating the deaf C. His radical call for classroom

    asked on November 2, 2017
  65. social studies

    How did horace mann feel that reforming the american educational system was important? A. it would help people attain better jobs B. it would help in the fight to end slavery C. it would help in the fight for gender equality D. it would help people become

    asked on November 1, 2017
  66. science

    where does energy come from in north carolina

    asked on October 31, 2017
  67. educational technology

    5-7 sentences about the progressive era

    asked on October 30, 2017
  68. social studies

    why does the cartoon from the bank war 1832 portray president jackson as a king? A many people felt he was motivated by his own wealth B some felt he had used his power inappropriately in vetoing legislation to recharter the bank C some felt there remained

    asked on October 19, 2017
  69. math

    Solve the following proportion x/3 = 6/9 A 18 B 27 C 2 D 24

    asked on October 16, 2017
  70. math

    Solve the following proportion x/3 = 8/9 A 18 B 27 C 2 D 24

    asked on October 16, 2017
  71. social studies

    Why did Jefferson oppose Hamilton’s plan for creating a national bank? Select all that apply. (2 points) He argued that Congress did not have the constitutional power to establish it. He felt that there would be no way to effectively run a national

    asked on October 3, 2017
  72. social studies

    Which of the following statements best summarizes Washington’s viewpoint on American foreign policy? (1 point) The United States can take advantage of Europe’s ambition. The United States should limit interaction with Europe to commerce, or trade.

    asked on October 3, 2017
  73. Math

    I need helppp D: ---------------- Simplify the expression -4-5(x+8) *-5x-44 *-5x+36 *-x-8 *-20x+8 5x+6(x-2)-8(x-3) *19x+36 *19x+12 *3x-36 *3x-12 x+8

    asked on October 3, 2017
  74. math

    If the relative change between the original price and the new price is 30% decrease, then the new price is ________% of the original price?

    asked on September 30, 2017
  75. ELA

    Your assignment for this portfolio is to do the following: research the Victorian period in England. You can focus on work, schools, historical events, cultural details, or holiday traditions. Compare the Victorian period to modern day life.

    asked on May 6, 2017
  76. math

    5. 4, 12, 36, 108, . . . A. 304, 912, 2,736 B. 324, 972, 2,916 C. 354, 1,062, 3,186 D. 332, 996, 2,988

    asked on February 27, 2017
  77. science

    Earth's energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your home's electricity, and explain why you

    asked on February 27, 2017
  78. Math

    A rectangular piece of fabric measures 37 by 45 inches. A triangular scarf with a height of 21 inches and a base of 25 inches is cut from the fabric. How much fabric is left over?

    asked on February 17, 2016
  79. Math

    1. What value for x makes the sentence true? 7x = 1 0 6 3 2

    asked on November 25, 2014
  80. Math

    The number p is the product of three different positive prime numbers greater than 2.If the sum of these three prime number is also prime, what is the smallest possible value for p? Won't the 3 number be 3-5-11? Thanks

    asked on May 21, 2014
  81. Calculus

    Find the position s as a function of time t from the given velocity v=ds/dv. Then evaluate the constant of integration so that s = s0 when, t = 0. 1. v = 3t2 , s0 = 4 I don't quite understand what the question is asking or what is s0 mean. Than

    asked on January 12, 2014
  82. Physic

    A horizontal force F pulls a mass m across the floor at constant speed a distance d. If the coefficient of friction between box and floor is u, the work done by the force F is. I know W= FD and Wf = umgd, but I don't understand what the question asking.

    asked on December 8, 2013
  83. Physic

    An elevator weighing 2000 kg falls with a downward acceleration of magnitude (1/2)g . What is the tension in the supporting cable? I got the answer as 49000 N.

    asked on September 16, 2013
  84. Physic

    A car traveling 100 km/h is 200m away from a truck traveling 50 km/h (in the same direction). Assuming constant braking acceleration, what is the minimum deceleration the car must have if it is not to hit the truck? Can someone hint me on how I can start

    asked on August 28, 2013
  85. Math

    Let say 5m x 5m, I know the answer is 25 m^2, but let say it was 25m / 5m, what would the answer be? I know it 5 but what the unit? Just 5m? Thanks

    asked on August 25, 2013
  86. Significant Figures

    The problem is 150 - 1 - 0.182 Since the least sig. fig. is 1 would the answer be 1 x 10^3 ?Thanks

    asked on August 22, 2013
  87. Math

    The problem I have to solve is log with base 2 ^6 multiply by log base 6 ^ 8. I use the change of base formula and got log6/log2 * log8/log6 Which become log6/log2 * log2()^3/ log 6 I'm stuck here thanks.

    asked on June 18, 2013
  88. Chemistry

    So I did a lab that consist of baking cookies and the mass of the final products isn't equal to the ingredients used. Could there be mass lost as gas ? What other factors might there be? Thanks

    asked on May 26, 2013
  89. Chemistry

    Find the polar coordinate of the following. (0,-6) I know r = sq.root of 6 but tan theta = -6/0 doesn't exist so how will I find the degree? Thanks

    asked on May 19, 2013
  90. Chemistry

    Name the compounds CH3CH2CHCH2CH3 - Is this 3-Pentane? Thanks

    asked on May 9, 2013
  91. Chemistry

    How much water must be added to 6 mL of a 0.05M stock solution to diltue it to 0.02M ? The answerI got is 15 mL. Is this correct? Thanks

    asked on April 18, 2013
  92. Math

    Is 2Cos x the same thing as Cos^2 x? Thanks

    asked on April 7, 2013
  93. Precalculus

    Verify the identities. Cos^2x - sin^2x = 2cos^2x - 1 When verifying identities, can I work on both side? Ex. 1 - sin^2x - sin^2x = 1 - 2sin^2x 1 - 2sin^2x = 1 - 2sin^2x

    asked on April 3, 2013
  94. Chemistry

    Does mass affect pressure? I understand volume, and temperature does but not sure about mass. If I have a gas with mass 15 g, wont this exert less pressure than a gas have a mass of 30 g?

    asked on April 1, 2013
  95. Chemistry

    The temperature of oxygen is 810 torr at 298 K , what will the pressure be at 330 K? Using Lussac's Law, would the answer be 896.98 torr? Thanks

    asked on March 31, 2013
  96. Chemistry

    Do elements with higher masses always have lower average velocity than those elements with a low mass? Thanks

    asked on March 12, 2013
  97. Chemistry

    I had to find the root mean square velocity of a gas using the only formula KE=1/2MV^2 . Is this even possible using only this formula?

    asked on March 11, 2013
  98. Chemistry

    I had to find the root mean square velocity of a gas using the only formula KE=1/2MV^2 . Is this even possible using only this formula?

    asked on March 11, 2013
  99. Chemistry

    What are the attractive forces that increase surface tension? -Would it be cohension and adhension? Thanks

    asked on March 5, 2013
  100. Math

    How would I solve this part of the Fibonacci sequence piecewise function? f(n) = f(n-1)+f(n-2) if n > 1. Thanks

    asked on March 2, 2013


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