# Rose

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?

2. ## 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

3. ## 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.

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

5. ## 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

6. ## Chemistry

Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2

7. ## Math

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

8. ## Physics

A bullet of mass 6.45 g is fired from a 66.0 cm-long rifle barrel at 237 m/s. The mass of the rifle is 4.50 kg. Determine the acceleration of the bullet as well as the recoil acceleration of the rifle.

9. ## Mathematics

What is the slop of the line passing through points (3,2),(0,-1)?

10. ## Geometry

Pressing a circular cookie cutter over a tray of 1 inch x 1 inch x 1 inch fudge cubes creates a cylinder. If the cylinder consists of approximately 12.6 fudge cubes, what is the approximate area of the cylinder's base? PLEASE HELP!!

11. ## Mathematics

What is the quotient when the product of 20 and 5 is divided by the sum of 20 and 5?

12. ## 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?

13. ## 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)

14. ## Physics 11

A 140 kg stationary crate is pulled by a force of 390 N along a horizontal surface. a) The coefficient of static friction between crate and surface is s = 0.25. Is the applied force large enough to begin moving the crate? Use physics calculations to

15. ## 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

16. ## science

Which of the following choices correctly describes the behavior of the sound wave as it moves from metal to air? The sound wave slows down and refracts. The wavelength and frequency decrease. The sound wave slows down and refracts. The frequency decreases,

17. ## 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?

18. ## 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?

19. ## Science

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

20. ## chemistry

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

21. ## Critical thinking

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

22. ## physics

A 425 g model rocket is accelerated upward at 86 m/s2 by its engine. What is the value of the force exerted by the engine on the rocket?

23. ## Science

a certain plant's roots contain higher concentrations of nitrates than the soil that surrounds them, which mechanism explains the movement of the nitrate from the soil into the plant's roots? is it facilitated diffusion

24. ## Physics

A student pushes horizontally on a textbook of mass 0.250 kg and holds it stationary against the classroom wall. a) Draw a free body diagram showing and labeling all the forces acting on the textbook. b) From your diagram, what is the friction force that

25. ## math

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

26. ## 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?

27. ## math

Unit rate 6 eggs in 7 days?

28. ## Math

You are setting up a system of programming codes for a universal TV remote. Each code will have five digits and cannot include a 0 or repeat any digits. How many codes: A) do not contain a 1? My answer: 8x7x6x5x4 = 6720 codes B)have 2 as the 2nd digit and

29. ## 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

30. ## Algebra

Mrs. Lewis plans to drive 900 miles to her vacation destination, driving an average 50 miles per hour. How many miles per hour faster must she average, while driving, to reduce her total driving time by 3 hours? I'm not sure how to set up the equation.

31. ## Chemistry

15.0g of potassium trioxochlorate (v) was crushed and heated with 0.1g of manganese (iv)oxide in it. Write an equation for the reaction and state the role of manganese (iv) oxide in it.

32. ## 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

33. ## Chemistry

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

34. ## 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

35. ## 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

36. ## 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

37. ## 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,

38. ## 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

39. ## 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

40. ## 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

41. ## ALGEBRA

Suppose you see a car with an advertised price of \$28,550 at \$614.45 per month for 5 years. What is the amount of interest paid?

42. ## MATH

EMILY WANTS A NEW DRESS. SHE ONLY HAS \$30 TO SPEND. SHE LIVES IN A STATE WHERE THE SALES TAX IS 5%. ABOUT (ESTIMATE) HOW MUCH CAN THE DRESS COST IF SHE WANTS TO SPEND ALL HER MONEY?

43. ## Maths - trig

Solve 3cos2x - 7cosx = 0, when 0

44. ## Science

) Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent

45. ## chem

why cant the molecule C2H6N exists?

46. ## World History

in which way could Christian man in the Ottoman Empire advance through social and political rights? they served as janizaries, right? Please help me.

47. ## math

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

48. ## Science

An object has a volume of 22 liters and a mass of 35 kilograms what's the objects density?¿???????????????

49. ## math

a plane leaves Vancouver headed for Toronto of a speed of 700 km/hr. Half an hour later a planes leaves toronto headed to vancouver travelling at a spped of 750 km/hr. the distance between vancouver and toronto is 3420 kn. How long after the plane leaves

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

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.

52. ## 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 +

54. ## 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

55. ## Calculus

Find the area bounded by the y-axis and x = 4-y^2/3

56. ## Music

What is the theme of the song, On s'attache? There are english lyrics but i don't know what the theme would be..

57. ## ALGEBRA

A hardware supplier manufactures three kinds of clamps, type A, B, and C. Production restrictions force it to make 20 more type C clamps than the total of the other types and twice as many as B clamps as type A clamps. The shop must produce 380 clamps per

58. ## science

Maria is preparing an experiment using three cups, one made of paper, one of plastic, and one of glass. She plans on pouring 50 ml of hot water into each of the three cups and recording the temperatures in 5 minute intervals. What is the independent

59. ## 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

60. ## math

5 pens and 3 rulers cost a total of £1.22 3 pens and 6 rulers cost a total of £1.53 How much does each pen and each ruler cost?

61. ## physics

a body weighs 400N in water.if the upthrust force is 20n.calculate its weight in air.

62. ## Algebra

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

63. ## Chemistry

Complete the following equations. Include names of all reactants and products A) CH3CH2CHCH - CH2+H2O --> | CH3 B) CH3CHC=CCH3 + H2 ---> | CH3

64. ## Data Management

You are thinking of using some leftover ceramic tiles to make a decorative border for a patio. You have ten blue, four gold, and six white tiles. In how many ways can you make the border if it requires 15 tiles and you use only blue and white ones? Explain

65. ## Physics

a spring extends by 10 cm when a mass of 100g is attached to it. what is the spring constant?

66. ## French - SraJMcGin

If my paragraph is correct « Une affaire terriblement seule de la vie. Vous entrez dans seul le monde et vous sortez seul du monde pourtant il semble à moi que vous êtes plus seul tout en vivant que jamais allant et venant » – Emily Carr In le roman,

67. ## physics

calculate the amount of heat energy required to melt a 1kg iron ingot initially at 20 ¡ãC? (heat of fusion for Fe is 33.0 J/g

68. ## physics 20

Two people, a and b, are pulling on a tree with ropes while person c is cutting the tree down. Person a applies a force of 80.0N (45.0degrees) on one rope. Person b applies a force of 90.0N (345degrees) on the other rope. Calculate the net force on the

69. ## Geometry Inscribed

line BC is tangent to circle A at B and to circle D at C (not drawn to scale) AB=11, BC=23,and DC=2. find AD to the nearest tenth. Image: i.imgur(dot)com/f4ThxTu.jpg

70. ## chemistry

a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?

71. ## 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?

72. ## math

20 copies of the school yearbook together weigh 50 lb. What is the weight of each book? How do I set this up?

73. ## science

Maria is preparing an experiment using three cups, one made of paper, one of plastic, and one of glass. She plans on pouring 50 ml of hot water into each of the three cups and recording the temperatures in 5 minute intervals. What is the independent

74. ## english 2 - revised please

Which part of the writing process was easiest for you? Which part was the most difficult? What did you learn from your writing experience during this class? In what ways have you learned to write more critically? How will this knowledge assist you with

75. ## medical coding

In alphabetic index of icd-10-cm non essential modifier are

76. ## Probability

one hundred clients of a registered tax agent fall into the cayegories of personal (25 male ,30 female), corporate (10 male, 15 female) and small business (8 male, 12 female).The agent selects a client at random to begin work, find the probability that the

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,

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.

79. ## 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

80. ## 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

81. ## Math

For a calculus quiz, the teacher will choose 11 questions from the 15 in a set of review exercises. How many different sets of questions could the teacher choose

82. ## Math

A game show has three doors labelled A,B, and C behind which there may or may not be a prize. A group of contestants are asked behind which doors they think there is a prize. The results are that 18 people choose A, 19 people choose B, 19 people choose C,

83. ## 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

84. ## Microbiology

What methods would you use to sterilize and clean a lab coat contaminated with a broth culture of Vibrio cholerae so that the lab coat could be safely used again? a. Method of sterilization: b. Method of cleaning: c. Name which method would be implemented

85. ## Microbiology

Name a pathogenic endospore-forming bacterium (provide genus and species names) which can be associated with improperly canned beans. Note what method is used to process canned beans. If the canned beans are not properly processed and these pathogenic

86. ## earlychildhood

when a teacher hears a preschool student using incorrect language she should

87. ## math

given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .

88. ## 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?

89. ## MATH

EVALUATE 5x - 2y + 4z WHEN x=3, y=2, AND z=4 ??

90. ## MATH

LINDA INHERITED AN ESTATE WORTH \$225,000. THE ATTORNEY TOLD HER THAT THE INHERITANCE TAX WAS 7% AND THAT THEY WOULD DEDUCT IT FROM THE ESTATE BEFORE GIVING HER THE MONEY. HOW MUCH MONEY WILL LINDA RECEIVE?

91. ## Math (Precal)

csc^2x secx/sec^2x+csc^2x simplify.

92. ## anatomy

If a person has stopped breathing and is recieving pulmonary resuscitation would it be better to administer pure oxygen or a mixture of oxygen and carbon dioxide?

93. ## Biochemistry

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

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

95. ## cultural diversity

Is (C) ethnicity the best answer for this question? Label shifts,such as African-American versus colored, Asian versus Oriental, and Latino versus Hispanic, relate to: A. ethnology B. ethnocentrism C. ethnicity D. ethnography

96. ## Social studies

Which statement best summarizes the paragraphs main point?

97. ## Physics

An athlete swims the length if 50m pool in 20s and makes the return trip to starting point in 22s.Determine the average speed and velocities a. the first half of the trip b.second half of the trip c. Round trip

98. ## History

Why is the Korean War significant in World History?