Summer

Popular questions and responses by Summer
  1. Chemistry

    The solubility of sugar is 204 g/ 100 g water at 20 °C. How many grams of water are needed to dissolve 612 grams of sugar at the same temperature?

    asked on March 24, 2018
  2. chemistry

    What is the maximum mass of aluminum chloride that can be formed when reacting 30.0 g of aluminum with 35.0 g of chlorine?

    asked on September 21, 2008
  3. math

    Helen had $12but spent $3 of it what percent did sh spend

    asked on July 1, 2019
  4. Chemistry (volume of gas)

    A sample of argon at 2.0 atm pressure is heated until its temperature is raised from 60 °C to 90 °C. The pressure of the gas at this temperature is 3.0 atm and the volume is 4.4 L. What was the initial volume of the gas?

    asked on March 15, 2018
  5. Chemistry

    H2SO4(aq) + H2O(l) ⟶ H3O+(aq) + HSO4–(aq) (Stage I) Identify the Brønsted-Lowry acid and base in the reaction.

    asked on March 24, 2018
  6. Chemistry

    A pool is filled with 24.0 liters of a chlorine-water solution with 8.00 ppm of chlorine. How many milligrams of chlorine are in the pool?

    asked on March 23, 2018
  7. Chemistry (partial pressure)

    A mixture consists of 3.2 grams of CH4 gas and 1.2 grams of H2 in a steel container. The pressure inside the container is 6.0 atm. The molecular mass of CH4 is 16 g/mol, and the molecular mass of H2 gas is 2 g/mol. What is the partial pressure of H2?

    asked on March 14, 2018
  8. Pre Algebra

    Describe the speed of the remote-control car over time. A. The speed of the car decreases from 4 mi/h to 2 mi/h in the first 3 seconds, increases to 5 mi/h in the next 2 seconds, and then remains at 5 mi/h for the last 5 seconds. B. The speed of the car

    asked on March 21, 2016
  9. Chemistry

    Use the heating curve of 50 g of water and the list of values to answer the question. specific heat of ice = 2.10 J/(g·°C) specific heat of water = 4.18 J/(g·°C) specific heat of water vapor = 2.07 J/(g·°C) latent heat of fusion of ice = 333.4 J/g

    asked on March 15, 2018
  10. Chemistry (evaporation)

    A 0.2 M KOH solution has a volume of 3 L. What percent of water should be evaporated to obtain a 0.6 M KOH solution?

    asked on March 23, 2018
  11. Chemistry

    Calculate Delte G Knot for H20(g) + 1/2 O2 H2O2(g) at 600. K, using the following data: H2(g) + O2(g) H2O2 (g) K = 2.3 X 10^6 at 600. K 2H2(g) + O2(g) 2H20(g) K= 1.8 X 10^37 at 600. K

    asked on September 22, 2011
  12. Chem

    742.5 J of energy is used to heat an unknown mass of aluminum from 10° C to 65.0° C. The specific heat capacity of aluminum = 0.90 J/(g·°C). What is the mass of the aluminum?

    asked on March 14, 2018
  13. English

    What is the analogy in Robert Frost's the road not taken? Please i need help i have read and re-read this poem and can't find the analogy.

    asked on February 24, 2020
  14. Chemistry (concentration)

    H2SO4(aq) + 2LiOH(aq) → Li2SO4(aq) + 2H2O(l) 3.2 moles of LiOH enter the reaction and are fully consumed. The molar mass of Li2SO4 is 110 g/mol. The final aqueous solution has a volume of 4.0 L. What is the final concentration of Li2SO4 in g/L? 44 g/L

    asked on April 11, 2018
  15. Chemistry (mol)

    2CO + O2 → 2CO2 If 3.4 moles of carbon dioxide (CO2) form at the end of the reaction, how many moles of carbon monoxide (CO) and oxygen gas (O2) entered the reaction?

    asked on March 24, 2018
  16. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution? The answer I got

    asked on March 24, 2018
  17. Chem

    What is the pOH of a 5.0 ×10-5 M hydrochloric acid (HCl) solution at 25° C?

    asked on March 23, 2018
  18. Algebra

    1.The ratio of nickels to dimes to quarters in 3 : 8 : 1. If all the coins were dimes, the amount of money would be the same. Show that there are infinitely many solutions to this problem. 2.A grocer wants to make a mixture of three dried fruits. He

    asked on November 7, 2013
  19. Chem

    NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/mol At 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this reaction?

    asked on March 30, 2018
  20. Chem

    CH3COOH(aq) + H2O(l) ⇌ H3O^+(aq) + CH3COO^–(aq) [H3O^+] = 4.0 × 10^–3 M [CH3COOH] = 0.90 M What is the Ka value for the reaction?

    asked on March 30, 2018
  21. Chemistry

    3.2 grams of CH4 gas applies 760 mmHg pressure at 273 K temperature. Assume ideal gas behavior. The ideal gas constant is 62.36 (L· mmHg)/(K·mol), and the molecular mass of CH4 is 16 g/mol. How much volume does the gas occupy?

    asked on March 15, 2018
  22. Chemistry

    The dipole moment (μ) of HBr (a polar covalent molecule) is 0.851D (debye), and its percent ionic character is 12.6% . Estimate the bond length of the H−Br bond in picometers.

    asked on November 18, 2013
  23. Chemistry

    Al(s) + MnO2(s) → Al2O3(s) + Mn(s) When this reaction is balanced, how many electrons are transferred in each half-reaction? The answer I got is 3*2=6. Is this correct?

    asked on April 5, 2018
  24. Chem

    Zinc fluoride (ZnF2) dissociates according to the following equation: ZnF2(s) ⇌ Zn2+(aq) + 2F–(aq) Ksp of this equilibrium is 3.0 × 10–2. If the concentration of zinc ions (Zn2+) in a solution is measured to be 4.4 × 10–1 M, what is the

    asked on March 27, 2018
  25. Chemistry

    Ammonia (NH3) ionizes according to the following reaction: NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq) The base dissociation constant for ammonia (NH3) is Kb = 1.8 × 10–5. Ammonia (NH3) also has a chloride salt, ammonium chloride (NH4Cl), which is soluble

    asked on April 9, 2018
  26. social studies

    What was the long-term effect of the Magna Carta?

    asked on November 10, 2016
  27. Pre Algebra

    6. Given the function rule f(x)=x^2-3x+2, what is the output of f(-2)? A. -8 B. 0 C. 4 D. 12 7. Suppose you earn $15 for each car you wash. Which function describes the relationship between your total earnings E and and the number of cars you wash C? A.

    asked on March 21, 2016
  28. Chemistry

    How do you assign oxidation states for each atom in the following compounds? 1. KMnO4 2. NiO2 3. Na4Fe(OH)6 4. (NH4)2HPO4 5. C6H12O6

    asked on August 23, 2011
  29. English 4

    What is the theme to Spenser's Sonnet 35? I have no clue! Please help asap! SONNET XXXV. MY hungry eyes through greedy covetise, still to behold the object of their pain: with no contentment can themselues suffice, but having, pine, and having not,

    asked on June 16, 2007
  30. Chemistry (spontaneous reaction)

    Which of the given conditions leads to a negative free energy value (spontaneous reaction)? 1. Highly positive enthalpy and highly negative entropy 2. Slightly negative enthalpy and highly negative entropy 3. Highly positive enthalpy and slightly positive

    asked on March 30, 2018
  31. Economics

    Suppose you are the manager of a California winery. How would you expect the following events to affect the market equilibrium price you receive for a bottle of wine? Please state the shift (leftward or rightward) of demand or supply. a. The price of

    asked on February 8, 2014
  32. Chemistry

    Calculate Delta G for H2O(g) + 1/2 O2(g) H2O2(g) at 600. K using the following data: H2(g) + O2(g) H2O2(g) k = 2.3 X 10^6 at 600. K 2H2(g) + O2(g) 2H2O(g) k = 1.8 X 10^37 at 600. K

    asked on September 25, 2011
  33. Chemistry

    Silicon is an element that is directly below carbon on the periodic table. Silicon can form bonds similar to carbon. Silicon-silicon single bonds require 222 kJ/mol of energy to break. Based on the statements, how much energy would it take to break a

    asked on April 9, 2018
  34. Chemistry

    NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/mol At 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this reaction? I came up with the solution of 0.896 kJ/mol. Is this correct?

    asked on April 9, 2018
  35. Chemistry (volume)

    The molarity of a sodium hydroxide solution is 0.2 M. The molar mass of NaOH is 40 g/mol. If 20 g of sodium hydroxide (NaOH) is dissolved in water in this solution, what is the volume of the solution?

    asked on March 24, 2018
  36. Chemistry (mol)

    Xe+3F_2=XeF_6 How many mol of xenon hexafluoride are produced from 4.01 x 102 mol of fluorine (F2)?

    asked on March 2, 2018
  37. Social studies

    Why does the u.s. Constitution limit the power of federal government?

    asked on May 11, 2016
  38. Psychology

    Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows. Person Dexterity Anxiety 1 1 10 2 1 8 3 2 4 4 4 -2 (c) figure the correlation

    asked on September 19, 2011
  39. Chemistry

    Which of the following solutions of strong electrolytes contain the largest number of ions: 100.0 mL of 0.30 M AlCl3, 50.0 mL of 0.60 M MgCl2, 200.0 mL of 0.40 M NaCl?

    asked on August 31, 2011
  40. English

    What are some constructive ways communicate their determination to take an action or reach a goal?

    asked on June 11, 2020
  41. social studies

    How are the Guianas different from the Caribbean islands? 1.The Guianas are mainly Spanish-speaking. 2.American Indian peoples live inland in the Guianas. 3.They have a mix of European and African cultures.** 4.They use languages brought by European

    asked on November 28, 2018
  42. Chemistry

    I. C(s) + O2(g) → CO2(g) ΔHf = −394 kJ II. H2(g) + O2(g) → H2O(l) ΔHf = −242 kJ III. 2C(s) + 3H2(g) → C2H6(g) ΔH =−84 kJ The combustion of C2H6 is shown by the following equation: C2H6(g) + O2(g) → 2CO2(g) + 3H2O(l) Which option correctly

    asked on April 9, 2018
  43. Chemistry (redox reaction)

    Which reaction is a redox reaction? 1. HCI+H2O=H3O^+ +CI^- 2. H2SO4+2KOH=K2SO4+2H2O 3. CH4+2O2=CO2+2H2O 4. Fe^2+ +2OH^- =Fe(OH)2 I chose number 3, is this correct?

    asked on April 5, 2018
  44. Chemistry (equilibrium)

    H2(g) + I2(g) ⇌ 2HI(g) The concentration of H2, I2 and HI are measured as 0.04 M, 0.08 M and 0.12 M at equilibrium and 200 K. What is the value of equilibrium constant?

    asked on March 30, 2018
  45. Chemistry (concentration)

    Iron fluoride (FeF2) dissociates according to the following equation: FeF2(s) ⇌ Fe^2+(aq) + 2 F^–(aq) A sample of iron fluoride (FeF2) is dissolved in water, and a saturated solution is obtained. The [Fe^2+] is measured to be 2.05 × 10^–4 mol/L.

    asked on March 30, 2018
  46. Chemistry (concentration)

    A 200 mL NaCl solution with a concentration of 4.0 g/L is mixed with a 600 mL solution containing 8% NaCl (m/v). What is the final concentration of salt in the solution in g/L?

    asked on March 24, 2018
  47. Chemistry

    If the latent heat of fusion for water is 333.4 J/g, how much heat is required to melt 170 grams of ice at 0 °C?

    asked on March 14, 2018
  48. Language Arts

    From the story from Joe Magarac, Man of Steel 10. Why do the people in the crowd mimic and mock the man from Johnstown in Selection 2? A.He acts as if he has won the contest, but he cant move the weight at all B. He bows at the crowd in the hope that Mary

    asked on May 3, 2016
  49. Language Arts

    1. In the following sentence, identify the word that the adverb is modifying. The ballerina danced gracefully on the empty stage. A. ballerina B. danced** C. empty D. stage 2. Identify the sentence below that contains coordinate adjectives. A. She wore a

    asked on October 6, 2015
  50. Math

    It took Markus half an hour to drive home from work.He averaged 34 miles per hour. How far does Markus live from work?

    asked on September 9, 2012
  51. Chemistry

    Find delta G knot for the following reaction: 2Ch3OH(l) + 3O2(g) --> 2CO2(g) + 4H2O(g)

    asked on January 2, 2012
  52. Chemistry

    For the reaction below 2 CH3OH(l) + 3 O2(g) 2 CO2(g) + 4 H2O(g) calculate Srxn at 298 K. (Hint: Use a table of thermodynamic data commonly found at the back of chemistry textbooks.)

    asked on January 1, 2012
  53. Calculus

    Find the RMS value of the function i=15[1-e^(-1/2t)] from t=0 to t=4 A. 7.5[sqrt(1+4e^-2 -e^-4)] B. 7.5[sqrt(4-2e^-2 +e^-4)] C. 7.5[sqrt(4+4e^-2 -e^-4)] D. 7.5[sqrt(5-2e^-2 +e^-4)]

    asked on November 28, 2011
  54. Math

    The area of a photograph is 15 square inches. If the width of the photograph is 3 inches, what is its length?

    asked on April 11, 2011
  55. college chemistry

    Calculate the amount of heat required to heat 80 grams of water from 10 to 53°C. The specific heat capacity for water is 4.184 J/g°C.

    asked on September 7, 2010
  56. English

    What are nonverbal ways people can show determination?

    asked on June 11, 2020
  57. Chem

    Which of the following six-carbon molecules can be a straight-chain alkyne with two triple bonds and no double bonds? C6H4 C6H6 C6H8 C6H10 I chose C6H6, is this correct?

    asked on April 9, 2018
  58. Chemistry

    A hydrocarbon consists of a benzene ring and two methyl groups. The methyl groups are located at opposite carbons and the molecule is perfectly symmetrical. Which option correctly describes the numbers of the carbon atoms the methyl groups are bonded to?

    asked on April 9, 2018
  59. Chemistry

    CH4 + Cl2 → CH4Cl + HCl Is this a double replacement reaction? I believe it is but am not entirely sure.

    asked on April 8, 2018
  60. Chem (electron transfer)

    KMnO4 + HCl → MnCl2 + Cl2 + H2O + KCl If the reaction occurs in an acidic solution where water and H+ ions are added to the half-reactions to balance the overall reaction, how many electrons are transferred in the balanced reduction half-reaction? The

    asked on April 2, 2018
  61. Chem

    A 0.2 M KOH solution has a volume of 3 L. What percent of water should be evaporated to obtain a 0.6 M KOH solution? The answer I got is, 66.7%

    asked on March 24, 2018
  62. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution?

    asked on March 24, 2018
  63. Calculus

    Oblique tracking. A ship leaves port traveling southwest at a rate of 12 mi/hr. at noon, the ship reaches its closest approach to a radar station, which is on the shor 1.5 miles from the port. if the ship maintains its speed and course, what is the rate of

    asked on July 18, 2017
  64. Calculus

    Imagine slicing through a sphere with a plane (sheet of paper). the smaller piece produced is called a radius of the sphere. Its volume is V=(pi)h^2(3r-h)/3, where r is the radius of the sphere and h is the thickness of the cap. find dr/dh for a sphere

    asked on July 15, 2017
  65. chemistry

    The density of diamond is 3.51g/cm^3,and the density of platinum is 21.43g/cm^3.If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders,which graduated cylinder would have the greatest volume

    asked on January 22, 2017
  66. chemistry

    The density of diamond is 3.51 g/cm^3 and the density of platinum is 21.43g/cm^3. If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders, which graduated cylinder would have the greatest volume

    asked on January 22, 2017
  67. History

    Which of the following would not describe Paleo-Indian culture? A.nomadic B.hunted woolly mammoths and mastodons C.invented pottery making*** D. needed sources of stone for tools

    asked on September 8, 2016
  68. Math

    A jug of water is 1/2 full. If 3 children equally share the water, what fraction of the full jug does each child get? A.6 B.1/6 C.2/3 D.3/2

    asked on May 12, 2016
  69. Social studies

    How might citizens engage in civic life to influence politics and government? Please help me with this question

    asked on May 11, 2016
  70. Pre Algebra

    1. Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream choosing a cookie at random, eating it, and then choosing another at random 2. Which of

    asked on April 12, 2016
  71. History

    1. What were the ideals of movement related to this medallion? @liberty of Congress A. abolition and suffrage B. freedom and abolition C. justice and temperance D. temperance and slavery 2. Based on the information in the poster below, which phrase best

    asked on March 21, 2016
  72. History

    1. What were the ideals of movement related to this medallion? @liberty of Congress A. abolition and suffrage B. freedom and abolition C. justice and temperance D. temperance and slavery 2. Based on the information in the poster below, which phrase best

    asked on March 21, 2016
  73. Pre Algebra

    A 154-lb person burns 420 calories per hour riding an excercise bicycle at a rate of 15 mi/h. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function.

    asked on March 21, 2016
  74. analtyic geometry

    a house is 40 feet wide and 60 feet long a lady wants to use 260 feet of fencing to fence an area behind her house. the back of the backyard is 60x+2x and one side is 200-4x divided by 2. the back yard is a rectangle shape

    asked on December 9, 2015
  75. Developing healthy eating habbits

    It's generally recommended that athletes consume approximately _______ percent of their daily calories from fat. A. 30 B. 60 C. 10 D. 90

    asked on January 25, 2015
  76. math mental math

    shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?

    asked on August 22, 2014
  77. 9th algebra

    the sum of the digits of a two place fraction is 9. When its digits are reversed, the new fraction exceeds the original by 0.09. Find the original fraction.

    asked on November 10, 2013
  78. Physics

    Draw an open circuit that consists of 2 sets of 2 cells connected in series, connected in [arallel with each other. Add a variable resitance R1 in series with a set of 3 light bulbs r2, r3, r4 in parallel with each other. Insert an ammeter and a voltmeter

    asked on January 27, 2013
  79. math

    valerie earns $25 a day plus $3 for each dog she washes. make a function table to show the relationship between the number of dogs she washed d and the total amount earned t in one day. write an equation to represent the situation.

    asked on January 15, 2013
  80. physics

    What is the direction of a person that walks 3.0-km North and 4.0-km East?

    asked on November 8, 2012
  81. physics

    What is the direction of a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

    asked on November 8, 2012
  82. Chemistry

    Consider the titration of 80.0 mL Ba(OH)2 by 0.400 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. a.) 0.0 mL *Which molecular equation do I use? b.) 20.0mL Ba(OH)2__+2HCl_+=>+_BaCl2_+____2HOH 80.0

    asked on January 10, 2012
  83. Chemistry

    The reaction describing the formation of ozone from oxygen is shown below. 3 O2(g) 2 O3(g) Calculate Grxn at 288 K for this reaction in a flask where [O2] = 3.419 x 10-2 M and [O3] = 5.783 x 10-4 M. Assume G° = 326 kJ. Use molarity to construct the

    asked on January 2, 2012
  84. psychology

    A researcher predicts that listening to music while solving math problems will make a particular brain area more active. To test this, a research participant has her brain scanned while listening to music and solving math problems, and the brain area of

    asked on September 12, 2011
  85. Chemistry

    A titration is performed by adding .600 M KOH to 40.0 mL of .800 M HCl. Calculate the pH before addition of any KOH. Calculate the pH after the addition of 5.0 mL of the base. Calculate the volume of base needed to reach the equivalence point. What is the

    asked on April 1, 2011
  86. math

    1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for

    asked on September 4, 2010
  87. Science

    After a soccer ball is kicked into the air, what force or forces are acting on it?

    asked on March 11, 2010
  88. literature

    Robert Frost's "The Road Not Taken" and "Stopping by Woods on a Snowy Evening"....how are both poems similar? besides the theme but rhyme scheme, use of figurative language or irony

    asked on August 21, 2009
  89. chemistry

    What mass of limestone (in kg) would be required to completely neutralize a 15.2 billion-liter lake that is 1.9×10−5 M in sulfuric acid and 8.6×10−6 M in nitric acid?

    asked on September 21, 2008
  90. Senior Paper

    For the Hitchhiker's guide to the Galaxy, would this work for a thesis? Douglas Adams was a promodernistic author who wrote a new level of Proto Science Fiction. Can you help me think of other main points about him, the late 70s-early 80s, and the history

    asked on July 6, 2007
  91. Anatomy / Physiology

    What are the effects of a heart murmur? LOTS of information in here: http://www.google.com/search?hl=en&q=heart+murmur+effects =)

    asked on March 12, 2007
  92. Chemistry

    How does Significant Figures work? If i had a number: 1,007,000 is that with 4 sig figs or 7 sig figs? I checked 5 different resources and gotten conflicting answers. Help! The answer will depend on what's being measured and how it's being measured. If

    asked on September 14, 2006
  93. Math

    You currently have 12 bottles of water on your shelf and want to keep a minimum level of 6 bottles at a time, you average sales of 2 bottles per day, what is the minimum number you would order for enough bottles for 7 days?

    asked on April 7, 2020
  94. Math

    Given the data 12, 39, 21, 18, 24, 17, 12, 25 a. What is the outlier in the data? b. What is the mean with the outlier? c. What is the mean without the outlier? A. 12; 21; 18.4 B. 12; 18.4; 21 C. 39; 21; 18.4 D. 39; 18.4; 21 I would like some help because

    asked on March 24, 2020
  95. math

    A jazz club's profit from booking local bands depends on the ticket price. Using past receipts, the owners find that the profit "p" can be modeled by the function p = -12t2 + 456t + 35, where t represents the ticket price in dollars. What is the maximum

    asked on February 10, 2020
  96. Math

    An inelastic collision occurs between a large truck and smaller sedan. Calculate the final velocity of the objects and explain the direction they will be traveling with the following data from before the collision: Small sedan mass = 1300 kg initial

    asked on February 6, 2020
  97. Geography

    Why is northern Scandinavia sometimes called the land of the midnight sun?

    asked on January 31, 2020
  98. English

    What is the secret to reaching someone with words? i need help figuring out what this means.

    asked on January 23, 2020
  99. Math

    If (3-x) + (6) + (7-5x) is a geometric series, find two possible values for a x b the common ratio c the sum of the GO.

    asked on January 3, 2020
  100. History

    Why did business leaders begin the practice of vertical integration? A. Big companies could grow by merging with other companies or acquiring them B. Factory workers could start in low positions and work their way up to management C. Large corporations

    asked on September 19, 2019

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