some kid
Most popular questions and responses by some kid
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 
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 
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 
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 xaxis in terms of k. c) What is the volume in part (b) as k
asked on April 12, 2009 
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 
AP Calculus
The position of a particle moving on the xaxis 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 
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 
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 
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 
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 
AP Calculus
Find the antiderivatives. 1) çãx (x+1) dx 2) ç(x^34)/ (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)/((1x^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 
algebra 1
8. Simplify. x+7/x^2+4x21 A. 1/x3 B. x3 C. 1/x7 D. x7 I went with A. Am I correct if not help me please?
asked on April 28, 2016 
physics
For a liquid, 0.500 cubic meters weighs 4590 N. What is the specific gravity of the liquid?
asked on September 22, 2009 
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 
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 
chemistry
For a liquid, 0.500 cubic meters weighs 4590 N. What is the specific gravity of the liquid?
asked on September 22, 2009 
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 
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

Health and Physical Education 8
D B B I Got 100%
posted on February 15, 2018 
2 question
It's bba
posted on June 16, 2017 
math
Jayce is correct I verified it before I took the quiz idk about the open response though
posted on May 27, 2017 
language arts
its BA BA
posted on February 7, 2017 
algebra 1
Wait I have one more question that I don't get
posted on April 28, 2016 
algebra 1
Okay thank you!
posted on April 28, 2016 
calculus
you guys are retards
posted on October 24, 2014 
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 
5th Grade Word Study
Dunno.
posted on March 19, 2010 
chemistry
i got an answer of 3.27 g, i hope that's right
posted on September 19, 2009 
AP Chemistry
I thought it couldn't just be squared because we have an uneven ratio (2:3)
posted on April 12, 2009 
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 
AP Chemistry
for the ICE chart, does it need to be in moles or molarity?
posted on March 30, 2009 
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 
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 
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 
math
yes. the numbers are exactly the same value.
posted on January 5, 2009 
Chemistry
what is Rb2SO3? like the compund name?
posted on July 14, 2008