Questions Asked on
April 5, 2007

  1. Chemistry

    1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of

    asked by Kira
  2. Math

    If the total bill at a restaurant, including a 15% tip, is $65.32, what is the meanl alone? I just need help setting up the equation. I know it should be in the format of 100*_____=15*_______ but I feel like I am missing 2 parts of the equation. Can

    asked by russell
  3. calculus pleas pleas help, derivates

    what is the derivative of x/tan(x) and find f'(pi/4) f'(x)=(tanx-x*sec(x)^2)/(tanx)^2 That's the quotient rule for derivatives or as my teacher says: Low,low, low D'High, minus High d'low all over low square that's the quotient rule. It's a song which

    asked by david
  4. physics

    A boy yells towards a clikff and hears his echo 3.15 s later. If the air temperature is 12 degrees C, how far away is the cliff? The distance the sound travels is twice distance. 2d=velocitysound*time Now for velocitysound at 12C... You have a formula for

    asked by gigi
  5. military,math

    can someone please help me with these problems. The posted speed limit for trucks along national route 3 is 35mph. how many kilometers will a convoy cover after 3.7 hours on the road traveling at the posted. a) 804.85 b)129.5 c)208.37 d)80.4 The village of

    asked by jake123
  6. military , math

    your squad just completed a 12 mile road march inf our hours flat. Althogether there were 15 check points, to include the road march completion point. what was the average time in minutes between checkpoints? 32 26.6 16 8 How many barrels does it take to

    asked by jake123
  7. military , math

    the emergency water storage capability your squad set up now holds 7,000 cubic feet of water. YOur commander has asked to fill it up. You estimate that a facility will hold 8,478 cubic feet. HOw many gallons are required to fill the facility? 11,055 74,470

    asked by jake123
  8. Religion-Islam-Al-Quran

    There seems to be no one here who is familiar enough with the Quran to answer you at this time. You are certainly free to use any search engine, but be aware that you will find conflicting and confusing results, as with most online searches.

    asked by Writeacher
  9. Biology

    Explain the meaning of the term 'regulating mortality factor' and how an understanding of this can lead to successful biological control of pests in agriculture and horticulture. Thanks!! If anyone truly understood it, there wouldn't be pests, would there?

    asked by Bean
  10. SCIENCE

    Please help. I'm trying to find out where I can find a web site to get this information. What adaptations do reef fish have that cause them to be different from other salt water fish? Also, what kinds of relationships have evolved that increase fish specie

    asked by Suzi
  11. chem

    A solution contains 32 g of KNO3 per 100g of water at 25 degree C. Is the solution unsaturated, saturated, or supersaturated? I think its saturated Look at your saturation chart. I will be happy to critique your thinking. is there one online?

    asked by jake
  12. chem

    a 45.8mL sample of a 5.8 M KNO3 solution is diluted to 1.00L. What volume of the diluted solution contains 15.0g KNO3? how do you do this? moles of solution: 5.8*.0458 moles Grams of solute= moles*molmassKNO3 Volume of 15g= 1000ml*15/gramssoluteabove

    asked by kyle
  13. science

    how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M stock NaOH solution?? I assume that you want the volumes rather than the mechanics of carrying it out? a) How many moles do you need in the 500 ml to have 0.200 M? b) What volume of 15.0 M

    asked by Mel
  14. Calculus, antiderivatives

    A student accelerates from rest at a rate of 3 miles/min^2. How far will the car have traveled at the moment it reaches a velocity of 65 miles/60 min? a(t) = 3 miles/min^2 so v(t) = 3t + k miles/min but when t=0, v=0 so k=0 then v(t)=3t d(t) = 3/2 t^2 + c

    asked by Andrea
  15. Calculus

    Show that the curves r=acos(è) and r=cos(è) intersect at right angles. can it be shown that the derivative of one is the negative reciprocal of the derivative of the other?

    asked by Amy
  16. word problems in algebra

    The cost of producing a number of items x is given by C = mx + b, in which b is the fixed cost and m is the variable cost (the cost of producing one more item). (a) If the fixed cost is $40 and the variable cost is $10, write the cost equation. (b) Graph

    asked by Amanda
  17. molarity

    calculate the molarity of k+ in a soln prepared by adding .2L of .200M K3PO4 and 75.0mL of .5M K3PO4. assume volumes are additive. A few of steps here and more than one way to answer the problem You need to calculate the total number of moles of K3PO4 from

    asked by Christine
  18. Creative Arts Question

    Quiet, expressive activities and manipulative experiences are both vital to which? 1. convergent thinking 2. appropriately defined sex roles 3. creative processing 4. risk taking and social development Wouldn't the correct answer be appropriately defined

    asked by Chrissie
  19. Biology

    how does the structure of green cell organelles relate to the metabolic process of photosynthesis and aerocic respiration many thanks http://en.wikipedia.org/wiki/Chloroplast http://en.wikipedia.org/wiki/Light-dependent_reaction

    asked by bex
  20. Geology

    The age of granite can be determined using radiometric dating. How would I explain the basis for the determination of a 238 U-Pb radiometric date of 1120 Ma for granite? Any help gratefully received. Tough one. I wonder if the following search results

    asked by Sam
  21. Safety

    Where does Occupational Safety originally come from? How/where in the world or human history did it start? Thank you Probably the first rules for occupational safety came from earliest human cultures, the hunter-gatherers. The hunters didn't want the wild

    asked by Amanda
  22. Calculus

    show that the curves r=asin(è) and r=acos(è) intersect at right angles. can you show that the derivatives for each are the negative reciprocal of each other? That is the key. i need more info..i know how to find the derivative...but how will that prove

    asked by Amy
  23. Science

    How do birth affect population size? The more births a society has, the more people it has. For further reading: http://en.wikipedia.org/wiki/Population_growth

    asked by Anonymous
  24. Math

    Hi, I need urgent help with these 3 integrals problems ... been stuck on the questions and the deadline is Friday. Thanks a lot ! 1) For the green's theorem, Q: Using Green's theorem, evaluate the line integral F(r).dr counterclockwise around the boundary

    asked by Blur
  25. math,algebra

    In roofing do the measurements they use by roofers using squares. Are these squares that they use for estimating the amount of materials needed for a roof related to the square in meter square? can someone explain to me how so? yes they are thank you

    asked by jasmin20
  26. Creative Expression Skills

    Creative thinking can be facilitated by which: 1.asking open-ended questions, 2.valuing scientific language and thinking, 3.supporting concrete awareness,or 4.encouraging sequential analysis. I think creative thinking can be fostered by asking open-ended

    asked by Jamika
  27. english

    Thank you for using the Jiskha Homework Help Forum. You can learn best with examples. 1. Object pronouns are used everywhere else (direct object, indirect object, object of the preposition). Object pronouns are me, you, him, her, it, us, and them. Examples

    asked by SraJMcGin
  28. Diddle....

    My teacher says that I "diddled" on last week's exam, and so he is taking away half of my points. What is "diddle?" In this case, "diddled" probably means that you wasted time or cheated on the exam. Because this word has many different meanings, please

    asked by Kung Li
  29. science

    Compare and contrast viruses and monerans? Since this is not my area of expertise, I searched Google under the key words "viruses monerans" to get these possible sources: (Broken Link Removed) http://www.umohs.org/student_projects/Biotest.pdf

    asked by Kay
  30. math,correction

    Can someone correct my answers thanks. Problem #1 The equation h= -16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112 ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for

    asked by jasmin20
  31. math,correction

    can someone correct this for me thanks A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. Use this information for exercises 35 to 38. Science and medicine. When will the ball reach a height of 80 m? h =

    asked by jasmin20
  32. math,correction

    can someone correct this for me thanks. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the dimensions (the length and the width) of the rectangle? My answer: x = 2.284cm wide and 3.284cm long.

    asked by jasmin20
  33. us government

    if the house can muster only the minimum requirement for a quorum, what number of votes would be needed to pass a bill? the constitution specifies a 3/4's majority for just one process. what is it? The majority of those present will pass a bill.

    asked by angie
  34. math

    What are the following symbols used in math sequences: a sub i, n, N? ai is the ith element of the sequence n is the value of i in the term you are refering to. For instance, 3,4,5,6 a3 is 5. That term corresponds to n=3 N is the number of terms in the

    asked by Carter
  35. Physics

    The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold

    asked by Mary
  36. gov

    two-thirds majority of both houses. is that 2/3 of house + 2/3 of senate or 2/3 of house + senate It means 2/3 of both the house, and the senate. bob, i'm still a little confused. is it my first answer or the second? It is 2/3 of each part of Congress. It

    asked by angelle
  37. Chemistry

    How many moles of propane are expected from the complete reaction of 82.8 g of propene? How many grams of propane are expected from the complete reaction of 101 g of propene? Kyle-- Here is a problem I worked last night for Kira (about half way down the

    asked by Kyle