# Lauren

Newest questions and responses by Lauren
1. ## Chemistry

I need help putting my answers in significant figures thanks 2 C8H18(g) + 25 O2(g)  16 CO2(g) + 18 H2O­(g) at STP How many moles of O2 are needed to react with 60.0g of C8H18 (octane)? mole of 02 = 60/114 = 53 mols 2 moles of octane =25 mols of 02

2. ## Chemistry

Convert 25 mL of 0.80 mol/L Mg(NO3)2(aq) into moles moles of Mg(NO3)2 = 0.8 x (25/1000) = 0.02

3. ## chemistry

how do catalysts work and what is the concept of a catalysis?

4. ## Chemistry

2. Complete the conversions below. Please show your work and include units in your final answer i. 8.5m = ? mm ii. 1.236km = ?cm iii. 400mL = ?L iv. 25.25cm = ? Tm v. 1zm = ? Zm vi. 45.6mol = ? mmol vii. 8,000,000km = ? nm viii. 1000cm3 = ? L ix. 25m3 = ?

5. ## Science

How many more times basic is bleach (pH of 12) than distilled water (neutral pH)? Answer= 100,000 Can someone explain how to get this answer?

6. ## chemistry

i was wondering what the balance equation this would be NaOH + H3PO4 --> Na3PO4 + H-OH (H20) thank you

7. ## science

i was wondering what the balance equation this would be NaOH + H3PO4 --> Na3PO4 + H-OH (H20) thank you

8. ## Science

Why are dry land areas-not just waterways and wetlands-included in a watershed? Can a possible answer be - with precipitation and elevation not all water flows out of the watershed and will often continue to flow where there is no direct runoff from recent

9. ## science

metric system: lower case letters are used for prefixes that include units that are....?

10. ## Math

How do you write an equation with two fractions into standard form? (2/5)x + (1/3)y - 2=0

11. ## Math Algebra

Simplify in radical form 2-√12 / 3+√5 Two minus radical twelve over three plus radical five. I believe I have to multiply by the conjugate but it’s coming out to a weird answer, could anyone solve and explain thanks.

12. ## english

what does social disorganization, functional-structural, social conflict, social issue and Symbolic Interaction mean? i have googled them but i don't understand

13. ## math

is this a function or not? because it has two same y's and x's... {(-6,3), (-3,-6), (4,-6), (4,-3)} thank you!

14. ## algebra

Task 2: Non-Linear System of Equations Create a system of equations that includes one linear equation and one quadratic equation. Part 1: Show all work to solving your system of equations algebraically. Part 2: Graph your system of equations, and show the

15. ## english

i have to give an "listed action list" on a proposal im doing about "improving reading habitats in children" what does that mean and how would i write that? i came up with a plan as if i was starting a reading program. would it just be completed sentences

16. ## writing

At this bookstore cafe, some people are talking too loudly on their phones and disturbing other costumers and holding up lines. I need help on a solution explaining 'where and how' the notice will be distributed (its only for the employees) and then a

17. ## writing

International business means connecting with a cultural and ethnically diverse audience and clientele. i need help on 3 examples on how i can ensure that we respect our readers' diversity

18. ## physics

The mass of a rocket car plus fuel is 2,000 kg. The rocket car starts from rest. The engine expels fuel (in the form of exhaust) over a period of 8 seconds. The exhaust has a velocity of 1,000 m/s due west, and the velocity of the rocket after 8 seconds is

19. ## writing

Assume that a new employee is taking over your job because you have been promoted. Identify a specific problem in the job that could cause difficulty for the new employee. Assume that you will need to write instructions for the employee to help him or her

20. ## Sociology

Any ideas on: Why does society perceive street (blue collar) crime has more impact in society? Why does society perceive white collar crime have more impact in society than blue-collar crime. Make an argument for each side and provide sociological

21. ## Physics

If the coefficient of kinetic friction is 0.24, how much work do you do when you slide a 55 kg box at constant speed across a 5.4 m -wide room?

22. ## Sociology

How does meads theory apply to one's life?

23. ## Algebra

Paul has \$60,000 to invest. His intent is to earn 14% interest on his investment. He can invest part of his money at 8% interest and part at 16% interest. How much does Paul need to invest in each option to make a total 14% return on his \$60,000?

24. ## science

Determine the CFU/ml if 1 ml of the 10-5 dilution is plated and 372 colonies are present following incubation. Thank you!

25. ## Lit

Will some help me write an alternate ending to frankenstein. Please

26. ## basic chem

The radius of a single atom of a genenric element x is 197 pm and a crystal of x has a unit cell that is face centered cubic. calc the volume of the unite cell. superr confused can you please show all work along with the answer Thank you

27. ## English

Hi Can someone please help me for an introduction on the topic of Gods existence being real . so Far all i have is God's existence has been an ongoing debate probably for centuries.

28. ## Science

Hi, could someone check my answers? The nucleus of an atom is made of _______. electrons and empty space protons and neutrons** protons and electrons neutrons and electrons Niels Bohr's model of an atom looked like a (n) ___. galaxy solar system** electron

29. ## Geometry

1. Let S be between R and T. Use the Segment Addition Postulate to solve for m. RS = 2m + 2 ST = 3m + 3 RT = 15 A. m = 3 B. m = 2 C. m = 9 D. m = 4

30. ## English

1 When he awoke, it was three o’clock in the afternoon. He bounded up with a start; half of one of 2 his precious days gone already! He spent more than an hour in dressing, watching every stage of his 3 toilet carefully in the mirror. Everything was

31. ## English

22 dramas, the text of all romances, the nerve-stuff of all sensations was whirling about him like the 23 snowflakes. Lines 22–23 offers an example of (1 point) allusion. alliteration. simile.

32. ## English

The suffix —ly, as in the word pretentiously, means which of the following? (1 point) Pretentiously is an adjective. Pretentiously is an adverb.

33. ## English

Since words have multiple meanings, the context of a word often provides clues to its meaning better than the dictionary's definition. In the following lines from Anne Bradstreet's poem "To

34. ## English

Whose writing reflects the following regional dialect? “‘Scuse me, suh, I’s lookin’ for my husban’. I heerd you wuz a big man an’ had libbed heah a

35. ## English

The following is an example of regional dialect from which author? "The feller took the money and started away; and when he was going out at the door, he sorter

36. ## English

Which poetic device is used in the sentence "There was an iciness, a sinking, a sickening of the heart"? enjambment metaphor consonance assonance

37. ## Chemistry

Hi this question is on my study guide and I want to make sure I get to the right answer and know why. Calculate K for the synthesis of ammonia at 400°C N2(g) + 3 H2(g) —> 2 NH3(g)

38. ## Chemistry

Hi this question is on my study guide and I want to make sure I get to the right answer and know why. Explain why the following reaction goes to completion instead of to equilibrium. Mg(s) + 2HCL(aq) -> MgCl2 (aq) + H2(g) (subscript 2 after MgCl2 and H2)

39. ## Chemistry

What is the molar change in enthalpy when 100g of ice is heated from -72°C to -18.2°C?(cp=37.4 J/k•mol) Would the answer be 1118 kJ

40. ## Math

2 adults and 4 children are going to disney it cost \$107 for adults and \$101 for kids. They dont want to spend more than \$650 and want to give the kids the same amount of money to spend at the park after buying the tickets. how much money can they spend on

41. ## Chemistry

Acid-Base Titrations In an indicator whose transition range is well above 7, ionization tends to be a. come complete and In- is a stronger base, b. more complete and In- is a weaker base, c. less complete and In- is a stronger base, d. less complete and

42. ## Chemistry

What is the normal concentration of an HNO3 solution if 412 mL of the solution is titrated by 147 mL of 2.03-N NaOH? What is the normal concentration of a Ba(OH)2 solution, given that 86.3 mL of the solution is titrated by 113.0 mL of 0.00715-N H3PO4?

43. ## Chemistry

Acid-Base Titrations These are fill in the blank and I really am not sure what the answers are 1. Indicators change color over a range that is called its ---? 2. The common indicator ---? is very useful in studying neutralizations that involve strong acids

44. ## Chemistry

What is the conjugate base of each of the following? H2SO4 H2CO3 NH3 HF

45. ## Chemistry

What is the conjugate base of each of the following? H2SO4 H2CO3 NH3 HF

46. ## math

A plane is flying at a constant altitude and speed of 500km/hr. At a certain point, the angle of depression from the airplane to a lighthouse on an island in the distance is 6 degrees. After 12 minutes, as the plane continues to approach the lighthouse,

47. ## Chemistry

Write the net ionic equation for the following reaction : Na3SO4(aq) + Ba(NO3)2(aq) —> BaSO4 (s) + 2 NaNO3(aq)

48. ## Chemistry

In the 18th century Lavoisier experimented with oxides, such as CO2 and SO2. He observed that they formed acidic solutions. His observations led him to infer that tot exhibit acidic behavior, a substance must contain oxygen. However, today that inference

49. ## Chemistry

Confused on these, please explain or show work for the answer if you can. :) 1. What is the morality of a water solution that freezes at -0.633°C? 2. What is the freezing point of a solution that contains 1.99 g of a molecular solute of molar mass 58.5

50. ## Chemistry

The volume of a balloon is 1 liter at 1 atm pressure and 0°C temperature. What volume is the ballooon at 2 atm pressure and 273°C temperature?

51. ## Chemistry

Calculate the volume of 1.86M Na3PO4 solution that can be prepared from 5.45 g of Na3PO4

52. ## Chemistry

Suppose that 2.00mL of 0.02 mol/L aqueous sodium sulphide, Na2S is used to test a 60.0mL sample of water containing 0.0004 mol/L mecury (II) nitrate Hg(NO3)2, ions. a. Write the balanced equation Hg(NO3)2 + Na2S = HgS + 2NaNO3 b. Determine the limiting

53. ## math

Name the congruent angles and sides for the pair of congruent triangles. ∆MGB ≅ ∆WYT

54. ## math

Find the measures of the sides of ∆ABC and classify the triangle by its sides. A(3,-3), B(1,4), C(-1,-1)

55. ## Chemistry

If E=hv and h is joules per second and v is waves per second, the end unit is J/s^2, but E can only be Joules, not s^2. How do I fix this?

57. ## Chemistry

Ricky uses ruler c to get a measurement of 3.19. His classmates thought he was wrong because his second digit was not 2. ( the picture shows an object at about 3.2 cm).

58. ## Chemistry

Over the years, the thermjte reaction has been used for welding railroads, in incendiary bombs, and to ignite solid fuel rocket monitors. The reaction is Fe2O3(s) + Al(s) ---> 2Fe(l) + AI2O3(s). What mass of iron (iii) oxide(rust) must be used to produce

59. ## Chemistry

Over the years, the thermjte reaction has been used for welding railroads, in incendiary bombs, and to ignite solid fuel rocket monitors. The reaction is Fe2O3(s) + Al(s) ---> 2Fe(l) + AI2O3(s). What mass of iron (iii) oxide(rust) must be used to produce

60. ## Chem

When 5.49 g of platinum reacts with an excess of fluorine, 7.65 g of platinum(_) fluoride forms. a. What is the mass of fluorine in the compound? b. Find the number of moles of platinum that reacted. c. Find the number of moles of fluorine that reacted. d.

61. ## Math

Jena is comparing prices of different cell phones. She made a dot plot to show the prices. How can she find the most common price? A) Find the dot all the way to the right. B) Find the dot all the way to the left. C) Find the shortest stack of dots. D)

62. ## College Algebra

00 is infinity 6. x\ge \:-2 or x>5 Interval notation (-00, -2] U (5,00) what will be the plotting points on the number line. 7. (-00,1]U (3,00) what will be the plotting points on a number line. 8. (-00,-2)U(8,00)what will be the plotting points on a

63. ## Math

I am confused with this question. A breakfast chef uses three different amounts of milk when making pancakes, depending on the number of pancakes ordered. The dot plot shows Customer's orders for pancakes one morning. How much milk does the chef need to

64. ## Math

How do I show model to multiply 0.16*0.5? I did try by shading .16 over 0.5 but it giving me .10 answer. I need my answer 0.08. Plz help me what I am doing wrong.

65. ## Math

Graph the inequality on the numberline and then write it in interval notation. 5/3y < 10

66. ## College Algebra

Graph the inequality on the number line and then write it in interval notation. Y+1/2≥2/3.

67. ## Math

The ice rink sold 94 tickets for the afternoon session, for a total of \$778. General admission tickets cost\$10 and youth tickets cost \$7 each. How many of each kind of tickets were sold?

68. ## College Algebra

At 1:30 Marlon left his house to go to the beach, a distance of 9 miles. He rose his skateboard until 2:15, and then walked the rest of the way. He arrived at the beach at 3:00. Marlon's speed on his skateboard is 3 times his walking speed. Find his speed

69. ## Math

The ice rink sold 97 tickets for the afternoon session, for a total of \$765. General admission tickets cost \$10 and youth tickets cost \$5 each. How many of each kind of tickets were sold?

70. ## Math

The ice rink sold 90 tickets for the afternoon session, for a total of \$700. General admission tickets cost \$10 and youth tickets cost \$6 each. How many of each kind of tickets were sold? College Algebra - Steve today at 6:45pm g+y = 90 10g+6y = 900 I am

71. ## Math

At 1:30 Marlon left his house to go to the beach, a distance of 11.25 miles. He rose his skateboard until 2:15, and then walked the rest of the way. He arrived at the beach at 3:00. Marlon's speed on his skateboard 2 times his walking speed. Find his speed

72. ## Math

Nathan has \$322 worth of \$11 and \$13 stock shares. The number of \$11 shares is seven more than twice the number of \$13 shares. How many of each type of share does he have?

73. ## College Algebra

Cassius drives his boat upstream for 30 minutes. It takes him 15 minutes to return downstream. His speed going upstream is two miles per hour slower than his speed going down stream. Find his upstream and downstream speed.

74. ## Math

how many different boxes, all with whole number dimensions and a different size base will have a volume of 8 cubic feet?

75. ## Math

A rancher is putting a fence around a square animal pen. The perimeter of the pen is 32 feet. The fence posts will be 16 inches apart. She starts by putting 1 fence post at each corner of the pen. How many fence posts does she use altogether? My solution

76. ## Math

What is the relationship between 1.0 and 0.1? A) 0.1 is 10 times as much as 1.0 B) 1.0 is 1/10 of 0.1 C) 0.1 is 1/10 of 1.0 D) 1.0 is equal to 0.1 My first elimination are c and d and I know that 0.1 is 10 times as much as 1.0. Now choice b is also true.

77. ## Math

Erin designs a trophy stand using one-inch cubes. The stand is shaped like a rectangular prism. How many different stands can Erin design using exactly 12 one-inch cubes? A) 8 B) 3 C) 5 D) 2 My work is 4*3*1, 12*1*1, 6*2*1, 2*2*3 Erin can make 4 different

78. ## Science

how many times does the sun appear to rise in a week? A) one B) Five C) seven D) not there I think it's c) seven. Plz check. Thank you!

79. ## Math

Lindsay draws a right triangle and adds the measure of the right angle and one acute angle. Which is a possible sum of the two angles? A) 180 B) 45 C) 90 D) 120 Answer is D) 120. Please correct me if I am wrong. Thank you for your help.

81. ## Math

I have done this problem converting numerical expression to word problem . Like (12x2)+(4x3) At arcade Jeff got 12 plushy for 2 coins each and 4 hand clapper for 3 coins each. Question asked how many coins he paid to buy all these toys? Answer is - 36 Now

83. ## Math

A chef makes 4 different quiches as the special of the day. At the end of the day, each dish had 3/8 of the quiche left. How much quiche was bought in all? Could someone please explain how to solve this problem?

84. ## Geometry

How to post a geometry question with picture?

85. ## Math

A certain grometry class has 36 students. if two-thirds are boys and three-fourths of the boys are under six feet tall, how many boys in the class are under 6 feet tall?

86. ## Geometry

Quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true? A. Quadrilateral ABCD is a square. B. Quadrilateral ABCD is a rhombus. C. Quadrilateral ABCD is a rectangle. D. Quadrilateral ABCD is an isosceles

87. ## Economics

If an industry is highly profitable, new firms are likely to enter the market. This would be reflected with a shift of the A- demand curve to the right B-supply curve to the right C-supply curve to the left D- demand curve to the left

88. ## Math

An ostrich at the zoo weighs 3 times as much as Marks's pet dog. Together, the ostrich and the dogweigh 448 pounds.how much does the ostrich weigh? Please help.

89. ## Physics

A motorboat is headed [W35ºN] with its engine set to move the boat at 25 km/h in still water. The current is flowing at 18 km/h [S]. What is the velocity of the boat relative to the shore? My work: cos(35º)=x/25 25cos35=x x=20km/h I have an issue with

90. ## Math

This is going to seem like a silly question, but I have to round points that fall on a graph to the nearest 1.25. Some of the points are 4.75, 4.5, 4.25, etc. - what would these round to? I just want to make sure I'm doing this right!

91. ## Statistics

What is the probability that the average lifetime of 25 bulbs would be no more than 1550 given mean of 1500 and standard deviation of 200 hours. I know that it is asking P(x less than or equal to 1550), x is 25, u equal 1500 and sd is 200. I'm having

93. ## Texas State History

What is the purpose of the NAFTA treaty?

94. ## Physics

A pilot checks her instruments and finds that her airspeed is 345 km/h and that she is heading in a direction [S40ºW].  A radio report tells her that the wind velocity is 85 km/h [NW].  What is the velocity of her plane relative to the ground? I tried

95. ## history

The 60's were a tumultuous decade: which event(s). legislation, etc. do you feel has impacted or changed history the most? thank you

96. ## Chemistry

When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature of 270 K. What is the pressure (atm) of H2 gas collected? Zn(s) + 2HCl(aq) à\longrightarrow ZnCl2(aq) + H2(g)

97. ## Math

1 pt) Consider the function f(x), for which f(0)=4 and f′(0)=−6. Find h′(0) for the function h(x)=1/f(x). h′(0) =

98. ## Math

One hour after x milligrams of a drug are given to a person, the change in body temperature T(x) (in degrees fahrenheit) is given by the function T(x)=x^2(1âˆ’x/3). Further, the rate Tâ€²(x) at which T changes with respect to the size of the