# lt

Popular questions and responses by lt
1. ## MATH

The sum of the squares of two numbers is 2. The product of the two numbers is 1. Find the numbers. xy=1 x^2+y^2=2 x^4+1=2x^2 x^4-2x^2+1=0 I don't think you can factor that unless its (x^2+1)(x^2-1) but I don't know where to go from there

2. ## Chemistry

During the electrolysis of an aqueous solution of CuSO4 with inert electrodes (A) the anode loses mass and the cathode gains mass. (B) the mass of the anode remains the same but the cathode gains mass. (C) the mass of the anode decreases but the mass of

3. ## Chemistry

Manganese has the oxidation number of +5 in ______ . . (A) [MnF6]3– (C) [MnO4]2– (B) Mn2O7 (D) [Mn(CN)6]–

4. ## Chemistry

Which statement is true for the cell as it discharges? Zn | Zn2+(1 .0 M) || Sn2+(1.0 M) | Sn (A) Oxidation occurs at the tin electrode. (B) Electrons will flow from the tin electrode to the zinc electrode. (C) The concentration of Zn2+ will increase. (D)

5. ## Chemistry

what is the molar solubility of lead sulfate in 1.0 X 10^-3 M Na2SO4? The Solubility Product Constant PbSO4 Ksp= 1.8 x 10^-8 The Ksp expression is: Na2SO4 = [2Na][SO4^-2] [2Na]=2x [SO4^-2]=x Ksp= 1.8 x 10^-8 = (x)(2x) Ksp= 1.8 x 10^-8 /4x^3 1.8 x 10^-8/4 =

6. ## Chemistry

a solution saturated in calcium hydroxide(limewater) has a pH of 12.35. What is Ksp for calcium hydroxide? How do i start this problem. please

7. ## Statistics

The International Olympic Committee states that the female participation in the 2000 Summer Olympic Games was 42%, even with new sports such as weight lifting, hammer throw, and modern pentathlon being added to the Games. Broadcasting and clothing

8. ## Stats

5. The board of directors for Procter and Gamble is concerned that only 19.5% of the people who use toothpaste buy Crest toothpaste. A marketing director suggests that the company invest in a new marketing campaign which will include advertisements and new

9. ## Chemistry

If two salts AX and BX2, have the same Ksp values of 4.0x10^-12 at a given temperature, then A. their molar solubilities in water are the same B. the salts are more soluble in 0.1 M NaX than in water C. the molar solubility of AX in water is less than that

10. ## STATISTICS

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its

11. ## Math

A candy bowl contained 723 candies. Some of the candies were red and the rest were green. There were twice as many green candies as red candies. How many red candies were in the candy bowl? Write an equation to solve this problem.

12. ## Chemistry

Which reaction will occur if each substance is in its standard state? (A) Ni2+ will oxidize Sn2+ to give Sn4+ (B) Sn4+ will oxidize Br– to give Br2 (C) Br2 will oxidize Ni(s) to give Ni2+ (D) Ni2+ will oxidize Br2 to give Br–

13. ## Chemistry

If the concentration of a saturated solution of SrCO3 is 0.000040 mol*L^-1, what is the value for the solubility product constant of this salt. How do I start this please

14. ## Chemistry

In the chemical reaction, . Zn(s) + CuSO4(aq) ¨ ZnSO4(aq) + Cu(s), (A) metallic zinc is the reducing agent. (B) metallic zinc in reduced. (C) copper ion is oxidized. (D) sulfate ion is the oxidizing agent.

15. ## Chemistry

All of the following species would be expected to be able to function a Lewis bases EXCEPT a. F- b. O2- c. OH+ d. H2O BF3

16. ## Chemistry

What is the OH^- concentraton of a solution that is 0.10M in Na2C2O4? I have a couple of these concentration questions asking different things but I don't know how to do them

17. ## Elementary Statistics help

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its

18. ## Possessive form

Cross out each incorrect possessive noun. Write correct possessive form. .......Small acts of kindness made the outcast's lives better. Answer Cross out outcast's Replace outcasts'

19. ## Math

Describe how this could happen that three different animals could each be claimed - rightfully - to be the largest of the three. Discuss the implications of this kind of situation for teaching students about measurement.

. Theory and origin of the separation of powers II. The division of powers among the branches of government A. The executive branch B. The legislative branch III. The separation of church and state IV. The judicial branch V. Current ideas about the

21. ## Chemistry

For there reaction system involving the species in the table below, what conclusion is justified for standard state conditions? Standard Reduction Potentials E0 2Fe3+ + Sn2+ ¡ú 2Fe2+ + Sn4+ +0.62 V Sn2+ + I2 ¡ú Sn4+ + 2I¨C +0.38 V (A) I¨C would react

22. ## Chemistry

In every electrolytic and galvanic (voltaic) cell the anode is that electrode (A) at which oxidation occurs. (B) which attracts cations. (C) at which electrons are supplied to the solution. (D) at which reduction occurs.

23. ## Chemistry

Which process represents a general method for the preparation of a metal from its compounds? . (A) neutralization (D) fusion (B) reduction (E) sublimation (C) oxidation

24. ## Chemistry

Free sulfur may act as either an oxidizing agent or a reducing agent. What is the best experimental evidence for this statement? (A) Sulfur forms sulfur dioxide as well as calcium sulfide. (B) Sulfur is a nonmetal. (C) Sulfur forms both organic and

25. ## Chemisty

Ok this is what i got for the grams part now.... Total mass is 20.14 + 51.64 + 11.34 + 15.06 = 98.18 %H2O = (20.14/98.18)*100 = 20.51% %C2O4 = (51.64/98.18)*100 = 52.60% % Fe 3+ = (11.34/98.15) * 100= 11.55% % K + = (15.06/98.15) * 100 = 15.43 % 20.51 g

26. ## Chemistry

Equal volumes of 1 M BaCl2 and 1 M NaSO4 are mixed. What effect will the addition of more Na2SO4 solution have on the concentration of Ba^2+ remaining in solution? *No effect *increase the concentration of Ba^2+ ions *Decreases the concentration of Ba^2+

27. ## Stats

The countries of Europe report that 46% of the labor force is female. The United Nations wonders if the percentage of females in the labor force is the same in the United States. Representatives from the United States Department of Labor plan to check a

28. ## Statictics

6. In 2000, the United Nations claimed that there was a higher rate of illiteracy in men than in women from the country of Qatar. A humanitarian organization went to Qatar to conduct a random sample. The results revealed that 45 out of 234 men and 42 out

29. ## Chemistry

Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 789/632 = ANSWER V2 =.3.35

30. ## Statistics

1) Find the missing parameter 1.mean 15, 30.15 %, above 50; what is the standard deviation 2.mean 75, 5.05% below 30; what is the standard deviation 3.standard deviation 9, 85.08% below 105: what is the mean 4.standard deviation 16.8, 15.62% above 18.3:

31. ## Latin

Quid est Quintus?

32. ## Grammar

What does personal , reflexive ,and intensive mean

33. ## English

Is the word humor abstract or concrete

34. ## SCIENCE

describe the preparation of 100mls of 1,0M from concentrated HCL?

35. ## English / Literature

Choose one archetype that is illustrated by two or more of the stories you have read, and write a brief essay explaining what an archetype is, what archetype you’ve chosen to discuss, and how the archetype is demonstrated in at least two different pieces

36. ## Math

Sarah spends 2/5 of her monthly income on rent. Sarah's rent is \$750. What is sarah's montly income? Write an equation to solve this problem.

37. ## Math

a long distance phone company charges \$3 for a phone call plus \$0.75 for each minute of the call. What !@#\$%^&tion does this situation give rise to? Find the formula and make a table for this function.

38. ## english

What does Thomas Paine value highly in the excerpt from his essay “The Crisis”? Freedom Solitude Individuality Spirituality Equality

39. ## MATH

x+y=-4 (x-2)^2+(y+7)^2=13 solve by substitution

40. ## exercise

What specific recommendations would you give on fuel selections and hydration to successfully run a 10 K race

41. ## MATH

y = sin (x - Pi sign) amplitude: period: phase shift:

42. ## Math

How do I solve: log6 (x^2-5x) = 1 1/2log5(r-2)-log5 r) log2 (x-1/x^8) I really don't know how to do these or even start

43. ## Math

Solve the polynomial equation, to obtain the first root. x^3+7x^2+19x+13 and 2x^4-19x^3+74x^2-127x=0 I don't know how to start these, or finish them

44. ## Math

2 square root -50 + 5 square root -32 i got 30i square root 2 is this right

45. ## Math

x/x+3 > or equal 2 (-3,6] or [-6,-3) or does it have an infinity in the answer

46. ## Math

Solve the polynomial inequality x^2+5x >or= -6 (-infinity, -3]u [-2, infinity) or [-3,-2]

47. ## Math

How do I figure these 2 out. Find standard form a +bi (4 square root -9) ( -3 square root -5) x^2 -3x+4 evaluated for x=1+i

48. ## Math

Determine whether the function x^3+x^2-1 is even, odd or neither. I thought it was odd because it has one negative sign is this correct

49. ## Math

Find all values satisfying x f(x) 3x-1 g(x) x^2-5x+12 (f*g)(x) = 17

50. ## PE

Why is it important to know an accurate VO2 max value when prescribing exercise?

51. ## Math

(X+1)/2 = 4 - (X+2)/7

52. ## Math

(square root of x+7)-5 = x Only the x+7 is square rooted how do I find the solution set???

My teacher is asking me to "Create a two-part answer for the concepts below" what is a two part answer

54. ## Math

how do i find the height of a triangle the base is 18 inches, the angled side is 82 inches and it is a right triangle

55. ## Math

If the ratio of two pulleys, A and B is 4:3, and pulley B has a length of 13.5 inches, how long is pulley A? [a] inches how do i figure this

56. ## Anthropology

Create at least two arguments each pro- and contra the establishment of a Global Culture does any one know about global culture or what it is

57. ## Dr. Bob Chemistry question

Ok this is what i got for the grams part now.... Total mass is 20.14 + 51.64 + 11.34 + 15.06 = 98.18 %H2O = (20.14/98.18)*100 = 20.51% %C2O4 = (51.64/98.18)*100 = 52.60% % Fe 3+ = (11.34/98.15) * 100= 11.55% % K + = (15.06/98.15) * 100 = 15.43 % 20.51 g

58. ## Chemistry

How do i write a good discussion/conclusion for a lab report.

59. ## Chemistry

Dr. Bob ok well here is what i have gotten so far: on the problem H2O: 1.118 mol C2O4: .58681 mol Fe 3+: .2025 mol K^+: .3862 mol That is what ive gotten doing 20.14 g(1 mol / 18 g) = 1.118 mol and so on with the rest of them Did i do that wrong

60. ## Chemistry

How do I find the percent composition of H2O: 20.14grams C2O4: 51.64grams Fe 3+: 11.34grams K^+: 15.06 grams and the empirical formula with these numbers

61. ## Anthropology

what is an Incipient Civilizations

62. ## Question for a Teacher

Are any of you a teacher... I have an important question that has to a teacher

63. ## Chemistry

Enough water is added to 0.35 g of benzoic acid to make 1000 mL of solution. What is the pH? Ionization Constant for Benzoic Acid Ka = 6.5 × 10–5 Molar Mass Benzoic Acid 122. g·mol–1 (A) 1.9 (B) 2.6 (C) 3.4 (D) 4.2

64. ## Chemistry

What is the molar concentration of silver ion in a solution containing 1.3 × 10–4 M CrO42–, saturated with Ag2CrO4? The Solubility Product Constant, Ksp for Ag2CrO4 is 9 × 10–12 (A) 1.3 × 10–16 (B) 7 × 10–16 (C) 9 × 10–12 (D) 2.6 × 10–4

65. ## Chemistry

The ionization constant of an acid, HX is 1 x 10^-5. When a mixture of 0.100 mol HXand 0.100 mol of NaX is diluted to a volume of one liter by addition of wate, the pH of the resulting solution is very nearly a. 7 b. 6 c. 5 d. 4

66. ## Chemistry

Which one of the following salts is obtained by the reation of a weak acid with a strong base. MgCl2 NH4F LiClO4 NaCl K2SO3

67. ## Chemistry

How do you calculate the pH, pOH, [H3O] and [OH] for a 0.067 M solution of sodium iodate

68. ## Chemistry

The dissociation for a weak base BOH in water found to be 1.25 x 10^-6. What is the concentration of H+ in a 3.2M soluton of BOH.

69. ## Chemistry

The pH of a 1.0 x 10^-3 M Ba(OH)2 solution at 25 degrees C is how can 11.3 be the right answer.

70. ## Chemistry

What is the pH of a buffer solution that is 0.20M methylamine and 0.15 M methylammonium chloride. which do i get the pH of

71. ## Chemistry

What is the pH of a buffer solution that is 0.15 M propionic acid and 0.20M sodium propionate? How do I start this problem

72. ## Writing Assignment

I have to write a short essay on a movie called the seventh seal and I was wondering about a certain part that interested me and that would be where he is playing chess with death can any one give me some help with this... like what does it mean... and ect

73. ## PreCalc

write in interval notation 2x^2 < or = 9x+5

74. ## PreCalc

Solve for the variable m^2 + 2m +3 > = 0

75. ## PreCalc

How do i solve for the variable 3x= sqrt5x+1

76. ## PreCalc

Solve the system by the addition method -10x^2 + 10y^2-320=0 30x^2 + 6y^2 - 336 = 0

77. ## Graphing

what are outliers and influential points in graphs dealing with data

78. ## Linear or nonlnear

how do i tell if my graph is linear or nonlinear...

79. ## Statistics

does anyone know how to do statistics

80. ## Statistics

Can someone help me start this please: There is some indication in medical literature that doctors may have become more aggressive in inducing labor or doing preterm cesarean sections when a woman is carrying twins. Records at a large hospital show that of

81. ## Statistics

What if my p value is below 0.05 does it reject or fail the null hypothesis

82. ## Statistics

How do you tell if the null hypothesis rejects or fails?

How do I tell if this is a mean or a proportion 1. Insurance companies track life expectancy information to assist in determining the cost of life insurance policies. The insurance company knows that, last year, the life expectancy of its policyholders was

84. ## statistics

5. There is some indication in medical literature that doctors may have become more aggressive in inducing labor or doing preterm cesarean sections when a woman is carrying twins. Records at a large hospital show that of the 43 sets of twins born in 1990,

85. ## statistics

A company claims to have invented a hand-held sensor that can detect the presence of explosives inside a closed container. Law enforcement and security agencies are very interested in purchasing several of the devices if they are shown to perform

86. ## Statictics

2. Herpetologists (snake specialists) found that a certain species of reticulated python have an average length of 20.5 feet with a standard deviation of 2.3 feet. The scientists collect a random sample of 30 adult pythons and measure their lengths. In

87. ## Help

The countries of Europe report that 46% of the labor force is female. The United Nations wonders if the percentage of females in the labor force is the same in the United States. Representatives from the United States Department of Labor plan to check a

88. ## Chemistry

Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 23/789 = V2 =.078 L Is

89. ## chemistry

convert 0.0840 mol to liters ??? is it 1 liter over 1 mol

1. ## Social Studies

banished the daimyo from japan

posted on March 18, 2020
2. ## Maths

sorry I meant 10

posted on March 11, 2019
3. ## Grammar

Thx

posted on September 15, 2015
4. ## Grammar

posted on September 15, 2015
5. ## English

Thank you so much

posted on September 15, 2015
6. ## English

posted on September 15, 2015
7. ## Math

Doesnt i^2 equal -1

posted on March 1, 2009
8. ## Math

For the second one i got 1+3i is this correct

posted on March 1, 2009
9. ## Math

is the answer 5 thats what i got

posted on February 3, 2009
10. ## Math

i don't have the height would i use 82 the slanted side

posted on May 19, 2008
11. ## Math

x = 6.7

posted on May 19, 2008