Leroy

Most popular questions and responses by Leroy
1. chemistry

What do you get when you mix nickel sulfate and sodium carbonate?

Can you PLEASE help me with this problem? I do not understand... The area of a triangle can be found by using the formula A=1/2bh. The area of the triangle can be represented by the expression -17.5x2^ - 138.5x - 27. The triangle's base length is greater

3. Chem

In the reaction NH4Cl = NH3 + HCl, the equilibrium concentrations were found to be [NH3] = [HCl]=3.71 * 10-3M Calculate the value of the equilibrium constant?

4. Algebra

Can you please review to see if I am on the right track with this problem: The length of a rectangle is 2 centimeters less than two times the width of the rectangle. If the perimeter of the rectangle is 98 centimeters, what is the length of the rectangle?

5. Physics

Two identical teflon rods are 10 centimeters long and rubbed with fur so that they each have a total negative charge of 20 microCoulombs that is uniformly distributed along their length. They are arranged along the same axis, with their ends 5 centimeters

6. physics

A planet orbits a star, in a year of length 4.46 x 107 s, in a nearly circular orbit of radius 3.17 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude and

7. Chemistry

What is the PH of an aqueous solution consisting of 0.070 M formic acid (HCOOH) and 0.070 M sodium formate (HCOONa)?

8. Algebra

Can you please help on this Algebra problem? Keana's piggy bank contains \$4.30 in nickels and dimes only. If she has 59 coins in her ban, then what is the sum of the digits in the number of nickels in Keana's bank? Write a system of equations for this

9. exercise physiology

calculate the total amount of work performed in 5 minutes of exercise on the cycle ergometer given the following flywheel 25n cranking speed 60rpm distance travel 6meters

10. Physics

A player kicks the football from the ground with a velocity of of 30m/s at 45 degree angle. Find the initial vertical velocity?

11. Chemistry

The ion-product of pure water, Kw, is 2.51 * 10(-14) at the body temp of 37 degrees Celcius. What are the molar H2O and OH concentrations in the pure water temperature?

12. Physics-Check

A missile launches at a velocity of 30.0 m/s at an angle of 30.0* to the normal. What is the maximum height the missile attains? (((30)*cos(30))^2)/(2*9.8) )

13. math

The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.

14. Algebra

Thank you...I forgot to add the other part of the question.. The sum of two number equal 25 The second number is 4 times larger than the first number. Write the two equations AND what are the two numbers. I have x+4x =25 but not sure what the two equations

15. science

compare the elements in an early protostar and those in a young star formed from star dust of older stars?

16. Math

The amount of money that a sales person makes varies directly as the total amount of sales made. if the sales person receives \$7,500 for selling a house for \$120,000, how much will he or she make if he or she sells a house for \$150,000?

Erin's age is 3 times Warren's. In 4 years she will be twice as old as he will be. How old is each now?

18. Physics

Double check this for me: A player kicks a football with an initial velocity of 3.00 m/s at an angle of 60.0* above the horizontal. What is the horizontal distance traveled by the football? s = vi*t + (1/2)(a)(t2) 0 = 3sin(30)t + 0.5(-9.8)(t2) t = 0.306

19. Algebra

Please help me with this Algebra problem: The length of a rectangle is 91 less than six times the width of the rectangle. If the perimeter of the rectangle is 84 centimeters, what is the length of the rectangle? Write a system of equations for this

20. Chemistry

Calculate the molar H3O and ClO3 concentrations of a .28 M solution of perchloric acid (HClO3)?

21. Math

f(x) = x^3 y1 = -x^3 + 4 b) Graph the function obtained from f by first translating up 4 units, then reflecting about the x-axis. Write a formula for the resulting function, y2. y2 = ? i tried x^3-4. my value wasn't correct

22. geometry

Ryan’s teacher asked him to graph circle E with equation (x – 5)2 + y2 = 25. Below is the graph he submitted. Circle E that contains points 30, 0; 5, negative 25; negative 20, 0; 5, 25. What, if anything, did Ryan do wrong when graphing this equation?

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24. Algebra

Please help me with this problem: A basketball team scored 50 times in their previous game. The team earned points from making two-point field goals (baskets) and one point free throws. If the team scored 87 points in their last game,how many two-point

25. Algebra

Can you please help with this problem: At Super Saver Mart (SSM), you can buy three packs of toilet paper and seven boxes of cereal for \$46.00. You can also purchase 8 packs of toilet paper and 4 boxes of cereal for \$75.00 at SSM. What is \$14 more than the

26. Algebra

okay...I just figured out the two numbers...but not the two equations: x+4x = 25 5x = 25 x=5...so two numbers are 5 and 20 thanks for your help

27. Algebra

The sum of two numbers equal 25. The second number is 4 times larger than the first number. What are the two numbers

28. Chemistry

original question on 11/19 @ 2:26 am current question page 4, close to the bottom.

29. Chemistry

Can you check my answer for the PH question @12:04 11/20?

30. Chemistry

can you look at the additional attached questions from me this morning at 2:29am? not fully understanding them. thanks for your help

31. Physics

Which force acts opposite of the direction of displacement of the object? I think it would be friction...but could it be spring?

32. thesis

What is the main idea Johanathan Edward's speech Sinners in the hands of an angry god?

1. college algebra

help

posted on June 13, 2018

1.C 2.C 3.A 4.B 5.A 6.Essay 7.D 8.B 9.D 10.B 11.C 12.D 13.D 14.C 15.B 16.A 17.C 18.B 19.B For checking your answers.(: those are 100% correct and I hope it brings your grade up. I’m glad to help you kids that parents scream at you if you don’t get an A

posted on March 15, 2018
3. physics

jenkins

posted on December 18, 2016
4. Chemistry

pKa = 7.6 for HCOOH so pH= 7.6 + log [.07]/[.07} pH = 7.6 is this correct or at least moving in the right direction?

posted on November 20, 2014
5. Chemistry

I am not understand how to use log on my calculate, so no answer is calculating. can you explain how to use log?

posted on November 19, 2014
6. Chemistry

I am not really sure how the find the pKa. Do I need to find the conjugate acid -base pair first?

posted on November 19, 2014
7. math

thank you, i think i got it now.

posted on May 21, 2011
8. Math

Can you tell me how you got that

posted on April 16, 2009
9. Physics-Check

Nevermind... v2-u2=2as Here a = -9.8 m/s 2 Putting in the values 0 - 225 = 2*(-9.8)*S S = 11.5 m That's it right>

posted on April 10, 2009