some kid

Most popular questions and responses by some kid
  1. Algebra 1

    The sum of the measures of angle A and angle Y is 90. If the measure of angle X is 30 less than twice the measure of angle Y, what is the measure of angle X? a) 20 degrees b) 35 degrees c) 50 degrees d) 65 degrees Is it d? Thank you!

    asked on December 14, 2015
  2. AP Chemistry

    What is ksp for lithium carbonate? I got an answer of 2.40 x 10^-4 but i need to check that answer with somebody who can work this out

    asked on April 12, 2009
  3. AP Chemistry

    It is found that 24.68 mL of 0.1165 M NaOH is needed to titrate 0.2931 g of an unknown acid to the penolphtalein end point. Calculate the equivilent mass of the acid.

    asked on April 14, 2009
  4. AP Calculus

    Let R be the first quadrant region enclosed by the graph of y= 2e^-x and the line x=k. a) Find the area of R in terms of k. b) Find the volume of the solid generated when R is rotated about the x-axis in terms of k. c) What is the volume in part (b) as k

    asked on April 12, 2009
  5. chemistry

    SrH2 (s)+ 2H2O (l) >>> Sr(OH)2 (s) + 2H2 (g) Calculate the mass of hydrogen gas that can be prepared from 5.22 grams SrH2 and 4.35 grams of H2O. I keep getting 0.729 grams but its wrong...

    asked on September 19, 2009
  6. AP Calculus

    The position of a particle moving on the x-axis at time t>0 seconds is: x(t)= e^t - t^1/2. a) Find the average velocity of the particel over the interval [1,3]. b) In what direction and how fast is the particle moving at t= 1 seconds? c) For what values of

    asked on April 12, 2009
  7. AP Chemistry

    In the titration of 50.0 mL of 1.0 M CH3NH2 (kb=4.4 x 10^-4), with 0.50 M HCl, calculate the pH a) after 50.0 mL of 0.50 M has been added b) at the stoichiometric point.

    asked on March 29, 2009
  8. AP Chemistry

    The identity of an unknown solid is to be determined. The compound is one of the seven salts in the following table. Al(NO3)3•9H2O BaCl2•2H2O CaCO3 CuSO4•5H2O NaCl BaSO4 Ni(NO3)2•6H2O Use the results of the following observations or laboratory

    asked on January 5, 2009
  9. AP Chemistry

    An unknown compound contains only the three elements C,H, and O. A pure sample of the compound is analyzed and found to be 65.60 percent C and 9.44 percent H by mass. a.)Determine the empirical formula of the compound. b.)A solution of 1.570 grams of the

    asked on January 5, 2009
  10. chemistry

    How many milliliters of 0.418 M HCl are needed to react with 52.7 g of CaCO3? 2HCl (aq) + CaCO3 (s) >>> CaCl2 (aq) + CO2 (g) + H20 (l) I got .00252 mL but its wrong. This is what I did: 52.7 g x (1 mol CaCO3/100.09 CaCO3) x (2 mol HCl/ 1 mol CaCO3)= 1.05

    asked on September 19, 2009
  11. AP Calculus

    Find the antiderivatives. 1) çãx (x+1) dx 2) ç(x^3-4)/ (x^2) dx 3) ç(3sinx) dx 4) ç(5secxtanx) dx 5) ç(1/x) dx 6) ç(e^x - 2x) dx 7) ç(3)/((1-x^2)^1/2) dx I picked the antiderivatives i did not know how to do. Please show me how to

    asked on January 22, 2009
  12. algebra 1

    8. Simplify. x+7/x^2+4x-21 A. 1/x-3 B. x-3 C. 1/x-7 D. x-7 I went with A. Am I correct if not help me please?

    asked on April 28, 2016
  13. physics

    For a liquid, 0.500 cubic meters weighs 4590 N. What is the specific gravity of the liquid?

    asked on September 22, 2009
  14. chemistry

    Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the excess reactant after the reaction of 7.60 g KMnO4 and 10.32 g H2SO4. 4 KMnO4 (aq) + 6H2SO4 (aq) + 2K2SO4 (aq) + 4MnSO4 (aq)+ 6H2) (l) + 5O2 (g) I have no idea

    asked on September 19, 2009
  15. calculus

    Suppose f(x) is the function 2x^3+ 12x^2+ 21x + 3. Find the smallest value of f at which the tangent to the curve is 3. I did: f'(x)+ 6x^2+ 24x + 21= 3 = 6(x+3)(x+1), x= -3, -1 the correct answer is supposed to be -8

    asked on September 29, 2009
  16. chemistry

    For a liquid, 0.500 cubic meters weighs 4590 N. What is the specific gravity of the liquid?

    asked on September 22, 2009
  17. math

    A conical tank sits point down, at ground level, so that the circular top of the tank is parallel to the ground. The tank is 5.0 meters tall, and the top of the tank has a diameter of 3.0 meters. The tank is half full of water. What is the water level

    asked on September 15, 2009
  18. physics

    The diameter of the earth is about 7.6 x 10^3 miles. What is the linear velocity of a person, on the equator, in feet per second?

    asked on September 7, 2009
  1. Health and Physical Education 8

    D B B I Got 100%

    posted on February 15, 2018
  2. 2 question

    It's bba

    posted on June 16, 2017
  3. math

    Jayce is correct I verified it before I took the quiz idk about the open response though

    posted on May 27, 2017
  4. language arts

    its BA BA

    posted on February 7, 2017
  5. algebra 1

    Wait I have one more question that I don't get

    posted on April 28, 2016
  6. algebra 1

    Okay thank you!

    posted on April 28, 2016
  7. calculus

    you guys are retards

    posted on October 24, 2014
  8. 7th grade math Ms. Sue please

    in connections too. are these answers at the top right? really need these to be right!

    posted on March 21, 2013
  9. 5th Grade Word Study

    Dunno.

    posted on March 19, 2010
  10. chemistry

    i got an answer of 3.27 g, i hope that's right

    posted on September 19, 2009
  11. AP Chemistry

    I thought it couldn't just be squared because we have an uneven ratio (2:3)

    posted on April 12, 2009
  12. AP Chemistry

    the question says: the solubility of Li2CO3 is 7.4 x 10^-2 mol/L, find ksp. I also couldn't find it on any of my talbes but it seems like its a doable question

    posted on April 12, 2009
  13. AP Chemistry

    for the ICE chart, does it need to be in moles or molarity?

    posted on March 30, 2009
  14. AP Calculus

    the weird symbols in front are supposed be integral signs but watever. i got number 1 and i have the rest i need someone to check the rest. 2)(1/2x^2)/(-4x) 3)-cosx 4)5secx + c 5)0 6)e^x - x^2 7) 3sinx

    posted on January 22, 2009
  15. AP Chemistry

    i don't know why it wont copy/pate. can u help me in the other chemistry question i posted?

    posted on January 5, 2009
  16. AP Chemistry

    Al(NO3)3•9H2O BaCl2•2H2O CaCO3 CuSO4•5H2O NaCl BaSO4 Ni(NO3)2•6H2O Use the results of the following observations or laboratory tests to explain how each compound in the table may be eliminated or confirmed. The tests are done in sequence from a)

    posted on January 5, 2009
  17. math

    yes. the numbers are exactly the same value.

    posted on January 5, 2009
  18. Chemistry

    what is Rb2SO3? like the compund name?

    posted on July 14, 2008