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!

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

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.

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

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...

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

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.

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

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

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

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

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?

13. physics

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

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

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

16. chemistry

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

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

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?

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

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

posted on March 21, 2013

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