# 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?

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?

3. ## math

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

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?

5. ## Chemistry

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

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?

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?

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

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

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?

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

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?

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.

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

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?

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

17. ## Chem

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

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

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?

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?

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?

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.

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?

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

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

26. ## social studies

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

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.

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

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,

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

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

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

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

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?

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?

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)?

37. ## Social studies

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

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

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?

40. ## English

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

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

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

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?

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?

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.

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?

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?

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

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

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?

51. ## Chemistry

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

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.)

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)]

54. ## Math

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

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.

56. ## English

What are nonverbal ways people can show determination?

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?

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?

59. ## Chemistry

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

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

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%

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?

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

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

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

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

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

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

69. ## Social studies

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

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

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

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

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.

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

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

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?

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.

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

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.

80. ## physics

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

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?

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

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

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

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

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

87. ## Science

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

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

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?

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

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 =)

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

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?

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

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

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

97. ## Geography

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

98. ## English

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

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.