# Questions Asked onApril 30, 2010

1. ## General chemistry

A solution of LiCl in water is 18.0 wt% LiCl. What is the mole fraction of LiCl?

2. ## Chemistry

How many mL of 18 M H2SO4 are required to react with 250 mL of 2.50 M Al(OH)3 if the products are aluminum sulfate and water? How do i solve this?

3. ## Economics

Define table laying and state the importance of table laying

4. ## chemistry lab

Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and provide the correct coefficients to balance the following equation: ___ Fe(NH4)2(SO4)2·6H2O + ___ H2C2O4 + ___ K2C2O4 + ___ H2O2 ___ KxFey(C2O4)z·nH2O + ___ (NH4)2SO4 + ___ H2SO4 + ___ H2O

5. ## science

if i weigh 100 lbs on earth how much would i weigh on halley's comet?

6. ## colleg physics

Sirius is about 9.0 light-years from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earth-based observer? How far is the trip according to you?

7. ## Physics

A cable lifts a 1200 kg elevator at a constant velocity for a distance of 34.5 m. What is the work done by the tension in the cable.

8. ## Chemistry

How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

9. ## Physics

How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2

10. ## trig

please help me. use trig. identities to find the exact value. tan 25° + tan 5° / 1- tan 25° tan 5°

11. ## college physics

Sirius is about 9.0 light-years from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earth-based observer? How far is the trip according to you?

12. ## algebra

write a polynomial for the length of the rectangle: area is- 7xto the 4th power minus 14x. the width is 7x.

13. ## chemistry

When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction \rm CaCO_3{\it(s)}\rightarrow CaO{\it(s)}+CO_2{\it(g)} How many grams of calcium carbonate are needed to produce 53.0 L of carbon dioxide at STP?

14. ## Statistics

Suppose a bag contains 7 red chips, 8 black chips, and 3 green chips. You draw two chips (without replacement) from the bag. Find the probability that you drew a red chip ﬁrst and then a black chip second.

15. ## Chemistry

A zero-order reaction has a constant rate of 3.20×10^−4 M/s. If after 35.0 seconds the concentration has dropped to 9.00×10^2M , what was the initial concentration?

16. ## Math

plot the point given in polar coordinates and find the corresponding rectangular coordinates for the point. (-1 , -3pi/4) I do not understand.

17. ## Chemistry

A mixture containing the same number of moles of SO2 and O2 is placed in a 2L container at 900K. The initial pressure is 1.90Atm. A reaction occurs leading to the formation of SO3: 2SO3 + O2 2SO3 After equilibrium is established the TOTAL pressure drops to

18. ## chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use

19. ## computers

I have just started a basic class in programming and I am totally lost. Can someone help me out? I have to write pseudocodes and create flowchart and don't have a clue. I need help with the following: flowchart, pseudo-code, Input and Output variables, and

20. ## chemistry-science

A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml of 1M NaOH, what is the pH? (pka = 4.74)

21. ## Chemistry

What is the molal concentration of an aqueous calcium chloride solution that freezes at -2.43 degrees Celsius?

22. ## Physics

A person pulls a toboggan for a distance of 37.2 m along the snow with a rope directed 25.4° above the snow. The tension in the rope is 84.1 N. How much work is done on the toboggan by the tension force?

23. ## physics

A sample of monatomic gas (£^ = 5/3) is expanded adiabatically from an initial temperature, volume, and pressure of 230. ¢XC, 6.00 litres, and 5.00 kPa, respectively, to a final volume of 7.00 litres. (a) What is the final pressure of the gas? (b) How

24. ## chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use

25. ## Probability

The public transport system is aware that one person in twenty does not buy a ticket for their trip. The manager decides to challenge 200 travelling people as to charger they have a valid ticket or not. (a) calculate the probabilty that everyone had a

26. ## Parabola Help

by plotting the graph of parabola y=2+3x-2x^2 which 3 option are true 1) the graph is the same as that of y=6+9x-6x^2 2)the parabola has a minimum point 3)the gradient of the parabola at x=2 is 0 4)the graphy=2+3x-2x^2crosses the x-axis at the same point

27. ## Math

I need to graph the polar equation 3 + 3cosQ and i need to create a table of values for r and Q. Could someone please explain how I would do this? Thank you!

28. ## algebra

Bayside insurance offers two health plans. Under plan a, Giselle would have to pay the first $200.00 or hre medical bills, plus 30% of the rest. Under plan B, Giselle would pay the fist$210.00, but only 20% of the rest. For what amount of medical bills

29. ## EA

Anyone else working on An overview of teaching techniques study unit???

30. ## Algebra

22. State the domain of the function y=3x+2 a. D: Real numbers b. D: x not equal to 0 c. D: x < 0 A? 23. State the range of the function y=2x^2 a. R: y greater than or equal to 0 b. R: x not equal to 0 c. R: y < 0 I'm not sure? 24. Is y=sqrt2x a function?

31. ## English

(telephone call) Hello. May I speak to Tony? 1. - Who's calling, please? 2. - Who's speaking, please? (Which one do we have to use? Are both OK?)

79. ## Chemistry

I know that benzaldehyde decomposes into benzoic acid and benzyl alcohol via Cannizzaro Reaction.. But, can benzyl alcohol go through a Cannizzaro Reaction to form benzaldehyde and benzoic acid?

80. ## Math

how do i solveseparable differential equation 7x−4y sqrt(x^2+1) dxdy=0 Subject to the initial condition: y(0)=−10

81. ## chemistry

you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?

82. ## accounting

The transaction would decrease one liability account and increase another liability account

83. ## math

what is 135/180 as a grade

84. ## psychology

Can I please have some information to help me discuss this question beloww: Analyze at lease two research methods used for uncovering basic emotions

85. ## English

Are there any deeper ideas in Journey to the Center of the Earth by Jules Verne? i.e. irony, symbolism, or anything like that

86. ## math

A straight line AB of length 10 units is free to move with its ends on the axes. Find the locus of a point P on the line at a distance of 3 units from the end on the x axis.

87. ## Health

I need help with a few questions. Please let me know if my answers are correct or not and thank you. 1- The process of breaking a complex substance down into smaller components is called? A- neutralization B- metabolism C- anabolism D- catabolism Answer- C

88. ## Accounting

The general manager of a business encounter many types of business transaction provide an example of a transaction?

89. ## Music

I just composed a song and I need it on a music piece. I need help. I can supply the tonic solfa and would only need it in a piece. Thanks.

90. ## Math

What do these factor out too?? (3w^2+w)(-6w-2) (3y^2+y)(6y+2) (6y^2+2y)(-3y-1)

91. ## american government

Consider the phrases “A belief in equal rights has often led to the belief in equality of opportunity;” and “American society does not emphasize equal results or equal rewards;” on p. 141 of the text. Explain these conceptions of equality in 200 to

92. ## Intermediate Algebra

Solve 6x=5-9 6x=-4 x=-2/3

30% of the people in kenya suffer from malnutrition because they grow WHAT and WHAT?

94. ## Math

here are some fractions : 3/9, 8/9, 7/9, 4/9, 2/9, 5/9, 6/9 If I were to put them in the order of the greatest, what order does that mean and how did you work that out?

95. ## Math

How do you know which one is the greatest? and why please? 7/8 or 1/2

96. ## Math

so with 4/8 and 7/8is 7/8 greater or less than 4/8 and why?

97. ## Math

How do I solve this equation 4n^2-25=0

98. ## Intermediate Algebra

Solve this please 5=6x=9 6x=5-9 6x=-4 x=-2/3

99. ## math (parabola)

Hi, the question is: Write the equation of the parabola with vertex(3,-1) and x-intercepts 2 and 4. I did this: y=?(x-3)^2-1 How to find the a-value? Many thanks, and I appreciate any answer!

100. ## earth science

which type of mountyain is found on island arcs?

101. ## algebra

which point is a solution of the inequality y > -3x + 1? a) (2,-1) b) (0,-1) c) (0,0) d) (-12,4)

102. ## algebra

which point is a solution of the inequality y

103. ## college

propose a health intervention aimed at eliminating health inequities

104. ## Vectors

The vector x and y are the lenght of 3units(they both have a magnitude of 3). If the magnitude of( vectorx + vector y)= root 17, determine the magnitude of (vector x- vector y)

105. ## Social

Hi i have 2 weeks to write a paper about anything related to marketing. It has to be 7 pages so I need a good topic and a place to find solid information (our teacher said don't use wikipedia at all because he hates it). I was wondering if you could help

106. ## Math

(9/5) log base 5 (x) = -1

107. ## Science

I just learned about binomial nomenclature and taxonomy. Where can I find a database of every single species in the world?

108. ## Intermediate Algebra

How are polynomials factored by grouping? Explain and give example

109. ## English 122 Composition II

Discuss any areas related to citing sources that you find confusing or difficult to understand or apply.

110. ## health

not really homework but just not getting answers to all my questions so in short.If an individual suffering from Alzheimer's Disease or other related dementia is content within their environment does that individual have "quality of life" or do you think

111. ## Intermediate Algebra

How are Polynomials factored by grouping? Explain and give example.

How do you write a positive message for a business that is going to have less work days and shorter hours?

113. ## crt/205

How will thinking critically influence the way I process information?

114. ## math

Solve the equation: Thank you 2/y + y-1/3y= 2/5

115. ## accounting tutoring

these guys are very good in accounting tutoring

116. ## social studies

still looking for more psychosocial challenges facing the old age.Or suggest sites for this.

117. ## math

can someone help me I am not understandng how to do this; Function k(x) = x+18 Find k(0) k(x) = 6x k(-2) k(5) k(-2) indicated outputs 2 F(x) = 4x - 5x

118. ## math

can any one explain why this integral diverges ? integration of [(e^(-sqrt(t)))/sqrt(t)]dt from 0 to infinity thanks

119. ## Math

5 to the second power - (3- 4 to the 3rd)

120. ## Math

0.3x+14.2=x-8.41

121. ## Math

10c(9c-1)-8=88c+10

122. ## Math

-7/58y times 29y to the 2 power

123. ## Math

2x+y x=2/7 y=5/6

124. ## statistics

H0: ¦Ð ¡Ü .60 versus H1: ¦Ð > .60, ¦Á = .05, x = 56, n = 80 can someone just explain why alpha is there? Is it used?

125. ## Math

evaluate the expression 2x-3y-4z x=7 y=-3 z=-1