rose

Most popular questions and responses by rose
1. chemistry

a sample of glucose, c6h12o6 contains 2.03*10^21 atoms of carbon. (a)how many atoms of hydrogen does it contain? (b)how many molecules of glucose does it contain? (c)how many moles of glucose does it contain? (d)what is the mass of this sample in grams?

asked on February 22, 2013
2. Math

When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer.

asked on February 25, 2018
3. English

Read the following sentences adapted from p. 129 of The Watsons Go to Birmingham-1963. The boys got into bed. Byron was up in his top bunk and Kenny was down in the bottom. Kenny was so excited that he was talking a mile a minute-although he realized that

asked on January 4, 2018

7. The cost for a business to make greeting cards can be divided into one-time cost (e.g., a printing machine) and repeated costs (e.g., ink and paper). Suppose the total cost to make 300 cards is \$900.00, and the total cost to ma 650 cards is \$1,600.00.

asked on March 11, 2018
5. Math

8. The graph below was drawn with the output on the vertical axis and input on the horizontal axis. What does this graph indicate about the relationship between the input and the output? (1 point) (Can't display graph) Please help I do not understand how

asked on March 2, 2018
6. science

1. Which statement about earthquakes is accurate? Select the two correct answers. a Most earthquakes are not strong enough to be felt by humans. b More than 1 billion earthquakes happens per year. c About 100 earthquakes per year are strong enough to cause

asked on September 13, 2019
7. Physics

You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 36.761s for the dart to land back at the barrel. What is the maximum

asked on October 31, 2016
8. Math

9. Which value could be the length of the missing side of the triangle? There's an isosceles triangle and one length on one side is 5 and the other is 12, and an x at the top. What is the length of x? A. 5 B. 7 C.17 D.12 Help i don't understand how to find

asked on January 24, 2018

2C8H18(g)+25O2(g)-->16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?

asked on October 5, 2009

1. Write a rule for the sequence. 8, -1, -10, -19... A. Start with 8 and add -9 repeatedly B. star with -9 and add 8 repeatedly C. start with 8 and add 9 repeatedly D. start with 8 and subtract -9 repeatedly--- 3. What is the 7th term in the following

asked on March 9, 2018

A solution contains one or more of the following ions: Hg2 2+,Ba2+ ,Fe2+ and . When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no

asked on October 5, 2009
12. Physics

Two springs are attached side by side to a green box of mass M. Determine an expression that describes the period of motion of the box attached to this combination of springs. The two individual springs have spring constants K1 and K2 respectively.

asked on January 21, 2013

1. Write a rule for the sequence. 8, -1, -10, -19... A. Start with 8 and add -9 repeatedly B. star with -9 and add 8 repeatedly C. start with 8 and add 9 repeatedly D. start with 8 and subtract -9 repeatedly--- 2. Find the next three terms of the sequence.

asked on March 9, 2018
14. Math

1. Which of the following ordered pairs is a solution of the equation y=-4x^2? (1 point) (-2, 16) ***My answer*** (1, -8) (0, -4) (2, -16)

asked on March 5, 2019
15. global studies

some polynewian islands are ring- shaped coral islands that surround a body of wate, or? a.)copra b.) coral c.)atolls d.)plates

asked on January 21, 2016
16. English

asked on December 21, 2017
17. Math

When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer.

asked on February 23, 2018
18. Math

Hello, could someone check my answers please? The Equation; \$4.50h = 20.00 shows the cost to play h hours of miniature golf how many hours of golf were played? Answer choices: A: 3 HOURS B:4 HOURS C: 4.8 HOURS D: 6.4 HOURS My answer: 4.8 hours

asked on March 16, 2018

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

asked on May 29, 2018
20. Science

Given the following balanced equation, determine the rate of reaction with respect to [O2]. 2 SO2(g) + O2(g) → 2 SO3(g)

asked on February 5, 2015
21. Sign Language

Which of the following are the three primary membership considerations of the Deaf community? A. audiological, attitudinal, disability B. audiological, attitudinal, linguistic C. attitudinal, audiometric, disability D. audiological, attitudinal,

asked on September 7, 2018
22. Math

Question: Can the numbers 24, 32, 40 be the lengths of the three sides of a right triangle? Please explain why or why not? My answer: Yes, the numbers 24, 32, 40 can be the lengths of a three-sided right triangle because of the Pythagorean theorem (a^2 +

asked on February 26, 2018

5. Find three solutions of the equation y=9x-4. (A) (-5, -49), (-2, -22), (3, 23) (B) (-5, -49), (2, -22), (3, 23)*** (C) (-5, -49), (-2, -22), (-3, 23) (D) (5, -49), (-2, 22), (-3, 23) 9.Which is a rule that describes the translation of a point from (4,

asked on April 12, 2018

Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes? Explain. I

asked on May 29, 2018
25. math

What are two digit number greater than 40 that is divisible by 2 and 3.

asked on May 1, 2017
26. Chemistry

Below are the formulas of some hydrates. what is the mole ratio of salt to water? Hydrate Na2SO4.10H2O Co(NO3)2.6H2O Mo(NO3)2.5H2O CaSO4.2H2O (CaSO4)2.H2) Thankk you

asked on July 22, 2010
27. Algebra

Is the equation true, false or open 4y+8=6y+3

asked on October 18, 2017
28. Physics

Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration: a= dv/dt = g - kv, where k is a constant. (a) Derive a formula for the velocity of the body as a function of time assuming it starts from

asked on September 26, 2013
29. physics

Two packing crate of masses 10.0kg and 5.00kg are connected by a light string that passes over a frictionless pulley .the 5.00kg crate lies on a smooth incline of angle 40.0 degree find acceleration of the 5.00kg crate and the tension in the string

asked on May 15, 2012

A student placed 11.0 of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until the

asked on October 5, 2009
31. Math

A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble? 2. What is the

asked on May 29, 2018
32. Biochemistry

How do you prepare 100 mL of a 0.1 M TRIS-HCl buffer with a pH 7.4 using solid TRIS base (MW 121.1) and 1 M hydrochloric acid? I started with pH=pKa + log ([Tris]/[Tris+] [Tris]/[Tris+]= 10^(7.4-8.06]=0.219 so 0.219:1 ratio with 2.219 total

asked on January 5, 2011
33. Science

Fill in the blank 1. _______ digestion occurs in the small intestine through the action of enzymes. 2. Urea, excess water, and other waste materials are eliminated in a water fluid called ___________. 3. __________ can cause infections by injecting DNA or

asked on November 19, 2018
34. trigonometry

a clock has a dial face of 12 inches radius the minute hand is 9 inches while the hour hand is 6 inches the plane of rotation of the hour hand is 2 inches above the plane of rotation of the minute hand. Find the distance between the tips of the minute and

asked on March 18, 2014
35. Physics

A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the

asked on January 1, 2015
36. grade 9 english

questions for short story Stones by sandra birdsell. 1) in two sentences retell the story. 2a) Compare the descriptions of the two woman's laughter in paragraph three. Explain how the similes capture the personalities of each of these characters. 2b)

asked on February 18, 2013
37. chemistry

Write the balanced equation for the hydration of CuSO4. Indicate the physical states using the abbreviations (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) to indicate the aqueous phase. Indicate appropriate charges on negative and

asked on November 1, 2013
38. chemistry

If 53.62 ml of an oil weighs 48.34 g, what is the specific gravity of the oil?

asked on February 19, 2013
39. math

Unit rate 6 eggs in 7 days?

asked on January 28, 2013
40. Math

Look at the shaded triangle. Describe two ways of drawing the square design below using any combination of translation, reflection, and rotations of figure I (the shaded triangle). I don't understand this question help.

asked on April 13, 2018
41. History

What attempts have European imperial powers made in the 20th century to address the atrocities committed in colonies throughout the world? (Select all that apply.) A) Many European nations have addressed their imperial actions by providing economic relief

asked on April 18, 2018
42. Algebra

A carload of fraternity brothers leaves their house for a long weekend road trip. Two hours later a second carload of brothers leaves the same house and travels the same path. If the second car drives an average of 15 mph faster than the first, what is the

asked on January 24, 2012
43. Math

Write a list of steps that are needed to find the measure of angle B. A measures 72 degrees and C measures 113. What does B measure? My Equation Answer: b=180-(a+c) 72+113=185 180-185= -5 My Word Answer: When you need to find the measure of B the answer is

asked on January 24, 2018
44. Chemistry

In the reaction Al2S3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2S(g), how many moles of HCl are used for each mole of AlCl3 formed? A.0 B.2 C.3 D.1 E.1.5 where do you start and how do you figure it out?

asked on December 13, 2017
45. chemistry

if 125g of magnesium sulfate heptahydrate is completely dehydrated, how many grams of anhydrous salt will remain? i would really appreciate anyone's help

asked on February 21, 2013

A general reaction written as 1A + 2B --> C + 2D is studied and yields the following data: Expt (A). (B) initial (C)/t 1. 0.150. 0.150. 8.00 x10^-3 2. 0.150. 0.300. 1.60 x10^-2 3. 0.300. 0.150. 8.00 x10^-3 What is the order of the reaction with respect to

asked on April 25, 2016
47. chemistry

A sample of liquid consisting of only C,H and O and having a mass of 0.5438g was burned in pure oxygen and 1.039g of CO2 and 0.6369g H2O were obtained. what is the empirical formula of the compound?

asked on February 21, 2013
48. math

How would i solve for n nP5 = 14(nP4)

asked on February 7, 2016
49. Math

Write a list of steps that are needed to find the measure of angle B. A measures 72 degrees and C measures 113. What does B measure? My Equation Answer: b=180-(a+c) 72+113=185 180-185= -5 My Word Answer: When you need to find the measure of B the answer is

asked on January 24, 2018
50. Math

When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer.

asked on February 26, 2018
51. Math

1.If two angles have equal measures, Then the angles are congruent. True*** False Write the converse of the conditional and problem 1. Can someone help walk me through this please?

asked on August 29, 2018
52. Critical thinking

Explain the relationship between informative, explanatory, and persuasive statements and critical thinking.

asked on October 5, 2011
53. chemistry

1040 kHz (typical frequency for AM radio broadcasting) Express your answer in meters using four significant figures.

asked on June 21, 2017
54. Math

Find the middle term in the expansion of (2x+3y)^12

asked on March 19, 2016
55. chemistry check if my answers are right. drbobzz

Acetylene gas(c2h2) is used in welding. During one job a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene calculate the following. Equation 2C2H2 + 5O2 ---> 4CO2 + 2H2O A) the mass of oxygen used B) the

asked on December 7, 2014

Find the percent by mass of sodium chloride in a 1.45M NaCl solution. The density of the solution is 1.05g/mol .

asked on October 5, 2009
57. Math

24. two stores carry a similar stereo for the same original price of \$573. one store offers a 16% discount and the second store sells the stereo for 458.40. which store gives the bigger percent discount? Justify your answer. ( 4 points) I don't understand

asked on January 8, 2018
58. Quadratic Relations, Algebra, Math

URGENT!! PLEASE HELP In a volleyball match. Jenny serves the volleyball at 14m/s, from a height of 2.5m above the court. The height o the ball in flight can be estimated using the equation h=-4.9t^2+14t+2.5, where h is the height, in meters, and t is the

asked on December 8, 2016
59. chemistry

the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?

asked on February 22, 2013
60. Educational Technology

1. Why is it important to have good study skills? (A)You will sleep better (B)You will learn more efficiently---- (C)You will have less free time (D)You will impress your parents 2. Why is it important to know how much time you spend on tasks? (A)so you

asked on January 18, 2018
61. science

if a scale of the solar system was built where 1mm equaled 1 mile, could the model be practically built in a city? yes or no I suppose the answer would be no because that is a really small diameter is 742 billion mm I just wanted to check with someone

asked on September 11, 2017
62. chemistry

When using a manometer to check Boyle's law, why is the pressure changed slowly? a. to avoid compressing the liquid b. to avoid compressing the gas c. to avoid changing the gas temperature d. to avoid changing the mass of the gas Is it B?

asked on February 26, 2019
63. psy

Ms. Sue, help me see the difference in those therms Rational and guilty Guilty but insane Not guilty by reason of insanity thank you

asked on June 9, 2009
64. Science

contact Lenses improve lives. Contact lenses are an example of an __________. my answer is indepentant variable. Someone help. it's for a science experiment.

asked on October 4, 2013
65. chemistry

A 2.50g sample of a hydrate of calcium nitrate was heated, and only 1.70g of the anhydrous salt remained. what is the formula of the hydrate?

asked on February 21, 2013
66. Chemistry

A 260-ml flask contains pure helium at a pressure of 756torr . A second flask with a volume of 470ml contains pure argon at a pressure of 717 torr . A)If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial

asked on October 16, 2009
67. Statistics

Tennis Ball Manufacturing: A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height of a ball’s bounce upward to be 55.5 inches. This average is

asked on May 26, 2015
68. chemistry

Write a balanced equation for the dissociation of Mg(NO3)2. I wrote Mg(NO3)^2(s)==>Mg^2+(aq)+NO3^3-(aq) That isn't the answer in the book. Can someone explain to me how dissociation works?

asked on November 1, 2013
69. chemistry

The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 80.0m/s , what is its corresponding wavelength?

asked on October 21, 2009
70. chemistry

Acettlene gas (C2H2) is used in welding. During one job, a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene, calculate the following: Balanced Equation a) the mass of oxygen used b) the mass if carbon

asked on December 6, 2014
71. Language Arts

Write an essay in which you analyze the importance of plot events and characters’ actions to the development of a story’s theme. Review and evaluate a story from the unit that has a clearly identifiable theme. You might choose “Raymond’s Run” by

asked on October 11, 2017
72. Biochemistry

What physical properties are different for the isomers of C4H10? Explain.

asked on October 7, 2009
73. Algebra

Starting at the same point, Angie and Payton jog in opposite directions. Angie can jog 1.5 miles per hour faster than Payton. After 2.5 hours, they are 20 miles apart. How fast can each person jog?

asked on February 8, 2012
74. Life orientation

In 15 line critically discuss 5 way which the human problem impact on the community for teenage pregnancy

asked on March 9, 2013
75. Social studies

1. What geographic feature of the Ozarks is not also a feature of the Ouachita Mountains? A - plate tectonics B - Alluvial plains C - Rolling plains D - Plateau 2. In what region of the U.S. is Arkansas located? A - Northeast B - South C - West D - Rocky

asked on February 6, 2018
76. English

Gansberg is very precise in this article, especially in his references to time, address, and ages.Why?

asked on October 23, 2017
77. Chemistry

The average rate of disappearance of ozone in the reaction 2O3(g) ---> 3O2 (g) is found to be 8.12 x 10^-3 molecules over 15 seconds. What is the rate of appearance of O2 during this interval

asked on April 24, 2016
78. Math

From the top of an 8m house the angle of elevation to the top of the schools flagpole across the street is 9 degrees The angle of depression is 42degrees to the bottom of the pole How tall is the flagpole

asked on March 8, 2016
79. Chemistry

A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1 MHz=10^6 Hz . Calculate the broadcast wavelength of the radio station 107.1 FM.

asked on October 20, 2009
80. Algebra

Starting at the same point, Angie and Payton jog in opposite directions. Angie can jog 1.5 miles per hour faster than Payton. After 2.5 hours, they are 20 miles apart. How fast can each person jog?

asked on February 8, 2012
81. chemistry

A mole of 1 gallon cans of paint could cover every square inch of the surface of how many planets the size of the earth?

asked on November 7, 2011
82. Chemistry

A student worked with a sample of ZnSO4.7H2O, what is the stoichiometric ratio of salt to water?

asked on July 22, 2010

How many air molecules are in a 12.0*12.0*10.0 ft room? Assume atmospheric pressure of 1.00 atm, a room temperature of 20.0 degree Celsius , and ideal behavior. Volume conversion:There are 28.2 liters in one cubic foot.

asked on October 16, 2009
84. Chemistry

lactic acid has a pKa of 3.08. What is the approximate degree of dissociation of a .35M solution of lactic acid? I do not know how to start it thanks!!

asked on April 21, 2009
85. Chemistry

A microwave oven operates at 2.40 GHz . What is the wavelength of the radiation produced by this appliance?

asked on October 20, 2009
86. Physics

William Tell must split the apple atop his son’s head from a distance of 45.1m. When William aims directly at the apple, the arrow is horizontal. At what angle must he aim it to hit the apple if the arrow travels at a speed of 45.956m/s

asked on October 30, 2016
87. Chemistry

mole ratio of Na2SO4.10H2O

asked on July 22, 2010
88. Science

20. If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore (an) ___________ with respect to the number of trout that a particular stream can

asked on April 14, 2017
89. chemistry

The normal boiling point of methanol is 64.7oC. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 670.0 torr at 64.7oC. What is the mole fraction of methanol in this solution?

asked on October 5, 2016
90. ELA (English)

"Miracles" Why, who makes much of a miracle? As to me I know of nothing else but miracles, Whether I walk the streets of Manhattan, Or dart my sight over the roofs of houses toward the sky, 5 Or wade with naked feet along the beach just in the edge of the

asked on March 11, 2018
91. physics

A quaterback throws the football to a stationary receiver who is 31.5m down the field. If the football is thrown at an initial angle of 40.0 degrees to the ground, at what initial speed must the quaterback throw the ball for it to reach the receiver? What

asked on October 8, 2011
92. Math

The price of a technology stock has risen to \$9.68 today. Yesterday's price was \$9.57. Find the percentage increase. Round your answer to the nearest tenth of a percent

asked on June 1, 2017

20. If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore (an) ___________ with respect to the number of trout that a particular stream can

asked on April 14, 2017
94. social studies

Which is a right that both citizens and non-citizens in the U.S. share? A. the right to vote B. the right to religious freedom C. the right to run for public office D. the right to have a job

asked on February 21, 2019
95. algebra

a model rocket is shot straight up from a roof the height at any time t is aproximated by the model h=-t(squared) +3t+28,where h is the height in metres and t is the time in seconds . When does the rocket hit the ground?

asked on March 12, 2013
96. Chemistry

A 2.85g sample of an unknown chlorofluorocarbon is decomposed and produces 560mL of chlorine gas at a pressure of 754mmHg and a temperature of 298K . What is the percent chlorine (by mass) in the unknown chlorofluorocarbon?

asked on October 16, 2009
97. Msth

I have a spinner that is divided into 3 equal parts,1/3 is N, 1/3 is E,and 1/3 is U. Use a tree diagram to find the probability that the spinner lands on N both times if the dpinner is spun twice?

asked on May 31, 2016
98. Chemistry

Calculate the enthalpy of formation of maganese (IV) oxide based on the following information. 4Al(s) + 3MnO2(s) --> 3Mn(s) + 2Al2O3(s) Delta H = -1790 kJ 2Al(s) + 3/2O2 (g) ---> Al2O3 (s) Delta Hf = -1676 kJ

asked on April 6, 2016