# Posts by lily

Total # Posts: 1,544

Chemistry
thanks a bunch!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) Given 16 g of HCl and 10g Fe react with how many grams of FeCl3 are produced (limiting reactant)?

Chemistry
thank you!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) What is the mole ratio of Fe reacted to FeCl3 produced?

Chemistry
thanks!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) How many liters of H2 would be formed if 200 g of Fe completely reacted with HCl at 40 degrees Celsius and 1.5 atm?

Chemistry
thank you!

Chemistry
2 Fe (s) + 6 HCl (aq) -> 2 FeCL3 (s) + 3 H2 (g) 12.2 grams of Fe reacts with excess of HCl. how many grams of FeCl3 will be produced?

Chemistry
thank you!

Chemistry
a 2.0M solution of Hbr will have what pH?

Chemistry
ooh okay, thank you DrBob222!

Chemistry
HBrO3 has a Ka of 3.6 x 10^-6. What is the pH of a 2.0M solution?

Chemistry
thank you so much!

Chemistry
Propanoic acid has a Ka of 1.3 x 10^-5. What is the % ionization in a 3.0M solution?

Chemistry
thank you!!

Chemistry
The PH of a 1.3M HF solution is 3.18. What % of the acid ionized?

Math
the probability of a team winning is 65%. The team played four games in a row. What is the probability of winning 4 games in a row?

geography
why communities have an interest in the urban growth and decline

college Calculus Help!
i got it, it correct answer is f'(x)=-x^5.

college Calculus Help!
but thanks

college Calculus Help!
what about f ' (x)? i did with (1/6)(x^6-21^6) but its wrong f(x)=∫(21,x) t^5 f'(x)= x^5 i font know

college Calculus Help!
If f(x)= ∫(21,x) t^5 dt then f'(x). my answer was 1/6 (21^6-x^6) it said it's wrong.

math
Sonya spent 3/8 of her money and then had \$15.00 left. How much money did Sonya originally have?

COLLEGE CALCULUS. HELP!
Evaluate the definite integral ∫(0,2) (x-1)^25 dx.. thats how i got stuck u=x-1, then du=dx =∫(0,2) u^25du =(1/26)u^26. i don't know what to do with integral (2,0)..

Algebra
0.16 times 360.

ms. sue
How did you know it was me?

writing
i just had a question. if i write down an essay a sort one can someone read it and tell me if its in the level that i want it to be in and/or give me some suggestions on how to improve it? Please answer because im applying for a program and need all the help i can get.

Math
The scale on a map is 1/4 inch = 25 miles. The Distance Between two cities on the map is 2 and 3/4 inches. What is the Actual Distance , in miles, between the two cities?

world history
omg shut up. ^^^^ and this website is no help

Algebra2
How do I solve this rational exponent equation? (2x)^1/2 = x - 4 Thanks in advance ^^

Alg2
How how I write the first six terms of this sequence? Please be detailed and thanks in advance :) f(n)= 3/-m

A 37.5-kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the ...

PHYSICS 111
A 37.5-kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the ...

Calculus ap
i got the answer right thanks

Calculus ap
Use implicit differentiation to find the slope of the tangent line to the curve XY^3 + XY = 5 at the point (3,2) .

Geography
What are factors leading to growth in lagos: Geographical Economic Political

chemistry
why is it necessary to add phosphoric acid in addition to sulphuric acid in the dissolving of a steel sample?

Physics 2
@ Megan ---------------------- Torque = (# of turns)(current)(Area)((magnetic field)(sin(angle))) Area = (circumference)^2 / (4π) circumference is distance around the edge of a circle. Torque = (1)(7.94)(((4.52 x 10^-2)^2)/(4π))(8.04 sin(90)) =(7.94)(((4.52 x 10^-2)^...

Physics 2
Torque = (the number of turns)(current)(Area)((magnetic field)(sin(angle))) Area = π × r^2 the angle is the angle between the normal to the plane of the coil and the magnetic field. Torque = (45)(40)(π(5.1)^2)(0.49 sin(90)) Maximum torque occurs when the ...

Chemistry
How many grams of carbon dioxide are produced in C3H8+5O2 -> 3CO2+4H2O

ALGEBRA
I don't really know but I think 10 cars weren't blue or red

algebra
Hi Dear Jiskha team, I have Algebra homework and I will need some help. The homework is following: Suppose you are using a computer to draw a face on a coordinate plane. The eyes are at (–3, 3) and (3, 3). The tip of the nose is at the origin. To make a smiling mouth, you...

spanish
how do you say i care about others than myself?

Physics
A banked circular highway curve is designed for traffic moving at 65 km/h. The radius of the curve is 207 m. Traffic is moving along the highway at 43 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the ...

Math
1/6 is .16666(repeating) in decimal form. To make it a percent, multiply by 100. So it's 16.67%.

Try dividing it into sections, finding the area of each section, then adding them all together. Many shapes will resolve into triangles, squares, and circles. (For example, the ears would be small triangles.)

Math(Algebra)
How would you set this problem up and work it: The difference between two numbers is 16. Three times the larger number is seven times the smaller. What are the numbers? This one also: The differnce between two numbers is 18. The sum of twice the smaller number and three times ...

Music Appreciation
Thank you

Music Appreciation
Short mood pieces of no set form are called _____. a. tone poems b. preludes c. overtures d. mazurkas B?

Math 543
The number 3136 is the sum of the first how many odd whole numbers?

Math 543
The number 3136 is the sum of the first how many odd whole numbers?

problem solve in math
At a teacher’s conference on the first Saturday in November in Palm Springs, CA, 100 teachers meet in a large room. Each teacher shakes the hand of every teacher in the room, except for his or her own hand. How many total handshakes were made?

Geometry
Which does not represent a possible intersection of a line and a right cylinder? a. 3 points b. 2 points c. 1 point d. a segment A?

Geometry
Thank you!

Geometry
How many points in a plane are in the locus of all points equidistant from two parallel lines in the plane? a.0 b.1 c.2 d.infinitely many D?

Math
Im not too sure how to find the x-intercept & y-intercept for a sstandard form question when it looks like this: 4x-12=0 If someone could explain this too me that would be awesome. thanks :)

Geometry
Thanks!

Geometry
Describe the locus of all points, in space, that are 5 cm from line p. a. a line, 5 cm from line p. b. a pair of parallel lines, each parallel to and 5 cm from line p. c. a sphere with a radius of 5 cm. d. a cylinder with a radius of 5 cm. D?

Name the smallest angle of triangle ABC, segment AC is 9, segment CB is 10, and segment AB is 8. <C <A Two angles are the same size and smaller than the third <B Thank you :) Your help is appreciated!

GEOMETRY ONE QUESTION!? THANK YOU!
THANK YOU!!!!!!!!!!!!!!!!!!!!!! ^_^

GEOMETRY ONE QUESTION!? THANK YOU!
In triangle ABC, centroid D is on the median line segment AM. AD=x+5 and DM=2x-1. Find AM. Thank You ^_^!!!!!

Geometry
The perimeter of triangle ABC is 29 meters. Line segment AD bisects angle A. Find AB and AC. CD=5cm, DB=4 cm.(triangle angle bisector theorem)

physical science
15 km/hr

FINANCE
You deposit \$2,000 in an account that pays 8% interest compounded semiannually. After 4 years, the interest rate is increased to 8.28% compounded quarterly. What will be the value of the account after 4 more years? (Do not round until the final answer. Then, round to the ...

earth
LAVA

science
what is the weather degrees for november 20 through november 25 in las vegas

Physics
i do not know

yes you are but you are have to write like this 0.66% .

Alg. II/Trig
If m and n are real numbers, i^2=-1, and (m-n)-4i=7+ni, what is the value of m?

Alg. II
Simplify. Identify any x-values for which the expression is undefined. 1. (4x-8)/(x^2-2x) 2. (8x-4)/(2x^2+9x-5)

Geometry
Name the property of inequality that justifies the following statement: If BC+DE<FG+DE, then BC<FG. Subtraction Property of Inequality?

Why is condensation on the beaker resulted from burning methane a chemical reaction?

trig derivatives
How do I find the derivative of 6 + 8cosx?

Trig/Algebra II
(3+√2)/(3-√2) is equivalent to: a. (11+6√2)/ 7 b. (11-6√2)/ 7 c. 11/7 d. 7/ (11+6√2)

physics
an experimental jetplane just after takeoff climbs with a speed of 500km/hr at an angle of 37 degrees with the horizontal. At what rate is the plane gaining altitude?

integrated algebra
Graph 2y = -1 + 2

math
Is 2,340 divisible by 90? How do you know?

World History
Thanks!

World History
Since independence, in most Latin American countries a. elected governments have been overthrown by a military coup'etat. b. elected governments have continued to function peacefully. c. Socialist governments have come to power in most countries. d. Communist governments ...

World History
Thank you!

World History
A major problem in relations between Israel and the Arab states was the a. resettlement of Palestinian refugees. b. failure to develop trade agreements. c. status of Jerusalem as an open city. d. level of influence Great Britain still exercised. A?

World History
Palace at knossos

arithmetic
1/3 and 1/4 and 1/8 and 1/5 and 10 and 1. Find the original number

chemistry
194.

geography
sea of japan

Physics
227

Algebra
John and two friends rent a canoe at a park. Each person must rent a life jacket. If the bill for the rental of the canoe and life jackets is 41, for how many hours did they rent the canoe?

Algebra
Use an equation to solve the problem. John and two friends rent a canoe at a park. Each person must rent a life jacket. If the bill for the rental of the canoe and life jackets is 41, for how many hours did they rent the canoe?

Math
I don't get what l and w would be

Math
WHAT IS THE PERIMETER OF A SQUARE WHOSE VERTICLES ARE A(-4,-3), B(-5,1), C(-1,2), AND D(0,-2)?

Math
sorry i meant 13

Math
TRY DIVIDING 65 BY 15

World History
Thanks again!

World History
People who proposed complete democracy for Great Britain were called a. anarchists b. Tories c. Chartists d. Conservatives C?

World History
Thank you!

World History
The Roosevelt Corollary extended the Monroe Doctrine by declaring that a. European powers might collect Latin American debts by force. b. European powers must give up their colonies in Latin America. c. the United States could intervene in Latin America countries if it seemed...

chemistry
The osmotic pressure of a solution containing 5.00 mg of an unknown protein per 10 mL of solution was 2.73 torr at 25 °C. Find the molar mass of the unknown protein.

Math
what kind of math journals, essays, & projects you guys do in 7th grade math??? i'm really curious i saw the grading policy 2 my skool website here is the grading policy for math DISTRICT GRADING POLICY MATHEMATICS -70% FORMAL ASSESSMENTS (Tests, Quizzes) -15% ALTERNATIVE ...

Parenthetical Citations
How detailed do I need to be with my parenthetical citations? I am using a website as a source with many different webpages. It is confusing because I don't know how detailed I need to be with web addresses. I must have 15 different webpages for the same site. Can I just ...

Modern History
Thanks :)

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