Thursday
July 24, 2014

Posts by mattie


Total # Posts: 81

chemistry
Kc for the decomposition of ammonium hydrogen sulfide is 1.8 x 10-4 at 15oC. a. When 5.00 grams of the pure salt decomposes in a sealed 3.0 L flask at 15oC, what are the equilibrium concentrations of NH3 and H2S? b. What are the equilibrium concentrations of the products at 15...

Math
how do I explain how to solve the following problem 2 X 10 square + 3 X 10 to the first + 5 X 10 to the zero +7 X 10 to the negative one

Science
80.56 N

pre-calc
find all values of 2sin theta-3csc theta=-5

Math
If I missed 24 problems out of 40, what is my grade?

math
If 37 out of 41 people get something right. What percent is that and how do you get the answer? Thank you.

science
light wave can move through what

math
Which division sentence is related to the given set of subtraction sentences? 36-9=27 27-9=18 18-9=9 9-9=0 Answer choices 36 divided by 9 = 4 36 divided by 18 = 2 18 divided by 9 = 2 36 divided by 12 = 3

Algebra
Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1 y^5 z^5)^-1 Thank you for any help you can give me-I'm so stuck for my homeworkk tonight. I know I can bring up the negatives to top and negative to bottom to make them positive but besides that-I d...

Algebra
Help please-I'm totally lost- How would I simplify (2x^5 y^4 z^3/x^-1 y^5 z^5)^-1 Thank you for any help you can give me-I'm so stuck for my homeowrk tonight. I know I can bring up the negatives to top and negative to bottom to make them positive but besides that-I don...

English-Please help!
I have a question and would appreciate any input or advice We just finished reading The Catcher in the Rye" and I'm stuck on a question for homework; Holden's anger over Stadlater dationg Jane, who symbolically guards her kings in a game of checkers shows his stro...

English
I have a question and would appreciate any input or advice We just finished reading The Catcher in the Rye" and I'm stuck on a question for homework; Holden's anger over Stadlater dationg Jane, who symbolically guards her kings in a game of checkers shows his stro...

punctuation
Please show me the correct way to punctuate the following or did I do it correctly: You can't pull my strings. I'm breaking away starting today.

English/writing
If I am writing the following as a poem, how would I punctuate it- would each letter at the beginning be a captial, would it have commas or a period. We are room 204 Check out our door It is clear to see We choose to be drug free

English/writing
But would you put commas, periods or anything like that in it. Would every sentence begin with a capital?

English/writing
If I am writing the following as a poem, how would I punctuate it- We are room 204 Check out our door It is clear to see We choose to be drug free

geometry
A transformation T : (x, y) (x + 3, y + 1). The preimage of the point (4, 3) is

math
A transformation T: (x, y) (x + 3, y + 1). For the ordered pair (4, 3), enter its preimage point.

STATS
a woman standing on a bridge overlooking a major insterstate wants to know how likely it is that the next 20 out of 50 cars that pass under the bridge are red cars, if she has observed in the past that the probability than any given car on that interstate highway is red is app...

child care
The most common underlying feature associated with reading disorders is? A Associated new words with those in memory. B.visually processing the shapes of letters. c.interpreting the meaning of words d.distingushing or seperating sounds in spoken words i think d

math
how would you solve a problem where someone drinks 4 to 7 sodas per week. What is a reasonable number of sodas they will drink in 8 weeks?

PHYSICS
In the Bohr model of the hydrogen atom, the electron makes 6.00×10^15 rev/sec around the nucleus.What is the average current at a point on the orbit of the electron?

Math
Please share a strategy with me. I also added answer choices to the first problem. What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a bag of 20 ap...

Math
What is the best way to solve the following problems: Sam's family eats 4 to 6 apples every day. Which is a reasonable number of days that it will take Sam's family to eat a bag of 20 apples? Terry's party started at 6:30 p.m. and ended at 9:00 p.m. What was the to...

math
How do you cross multiply to find out the following: 3/5=2/4 3/5>2/4 3/5<2/4

CHEMISTRY
Consider the reaction shown below. 4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol PH3 is consumed in a 1.9-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?

Calculus
find (d^2y)/(dx^2) if 5x^2-8y^2=8

physics
Within the nucleus. What strength of electric field does a proton produce at the distance of another proton, about 4.00×10−15m away? ___N/c

Chemistry
How many grams of NiSO4*6H2O are needed to prepare 200*10^2 mL of a 3.5*10^-2 M NiSO4 solution?

Chemistry
Can visible light cause excitation of an electron in water? explain

physics
Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.

Physics
Find the center of mass of the carbon monoxide molecule , given that carbon has a mass of 12 u, oxygen has a mass of 16 u , and the two atoms are 0.111 nm apart.

Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 30. cm3. If the combustion of this mixture releases 980. J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion ...

chemistry
A piece of solid carbon dioxide, with a mass of 7.4 g, is placed in a 4.0-L otherwise empty container at 27°C. (a) What is the pressure in the container after all the carbon dioxide vaporizes? 1.0atm (b) If 7.4 g solid carbon dioxide were placed in the same container but i...

chemistry
Calculate the pressure in the flask in torr, atmosphere, and pascals if ha = 114 mm.

chemistry
A 14.5-L tank is filled with H2 to a pressure of 2.00 102 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.

chemistry
The rate of effusion of a particular gas was measured and found to be 25.0 mL/min. Under the same conditions, the rate of effusion of pure methane (CH4) gas is 46.4 mL/min. What is the molar mass of the unknown gas?

PHYSICS
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

Chemistry
A 14.5-L tank is filled with H2 to a pressure of 2.00 102 atm. How many balloons (each 2.00 L) can be inflated to a pressure of 1.00 atm from the tank? Assume that there is no temperature change and that the tank cannot be emptied below 1.00 atm pressure.

Chemistry
Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 76°C at 747 torr.

Chemistry
What volume of each of the following bases will react completely with 24.00 mL of 0.350 M HCl? 0.100 M NaOH 0.0500 M Ba(OH)2 0.250 M KOH

Chemistry
When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 9.0 M HCl is required to react completely with 5.00 g of magnesium?

PHYSICS
A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/s The time required for the football to reach the highest point in its trajectory is 1.53s. It gets 11.5m above the ground. How much time after it is thrown...

Physics
A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 300 m. You can ignore air resistance. How much time is required for the bomb to reach the earth? 7.82s How fa...

Physics
A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/s The time required for the football to reach the highest point in its trajectory is 1.53s. It gets 11.5m above the ground. How much time after it is thrown...

physics
A train slows down as it rounds a sharp horizontal turn, slowing from 87.4 km/h to 44.6 km/h in the 16.1 s that it takes to round the bend. The radius of the curve is 180 m. Compute the acceleration at the moment the train speed reaches 44.6 km/h. Assume that it continues to s...

physics
A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.70 m/s. (a) What is her average speed over the entire trip?

physics
A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 2.70 m/s. (a) What is her average speed over the entire trip?

geometry
solve the equation 3^2x + 2.3^x - 15 = 0

all
What does it mean when a school has a web based curriculum?

math
Please help with all of these: 3 out of 32 10 out of 30 20 out of 29 3 out of 35 9 out of 34 24 out of 33 17 out of 19

math
so is 9 out of 34 26.4%

MATH
what percent is 3 out of 35 what percent is 9 out of 34 what percent is 24 out of 33

math
What are the following percents: 7 out of 53 17 out of 52 4 out of 18 7 out of 18 3 out of 33 9 out of 31 3 out of 35 7 out of 32

math
how do I figure out the following:52 students take a test and only 3 pass the test what percent of the students passed I need a strategy/show how you got the answer thanks

math
I am doing 4th grade number sense are there any cool math tricks or short cuts that would be good for me to know.

math
got it now

math
I think I must be asking my question wrong, but what is my number grade if I missed 36 out of 85 questions. For example if I missed 1 out of 10 I know my grade would be a 90.

math
If I have 85 questions on a test, but I only got 36 correct-what is my grade?

math
How do I figure a percent question for example what is 7 out of 50?

com140
resume and job letter

math
what percent is 23 of 51

math
My brother George needs help with a math question. What percent is 23 students of 51 students?

math
How can I add a two digit number and two three digit numbers in my head. Any tricks anyone knows in connection with short-cuts to solving different math problems( such as addition, subtraction,multiplication, division, rounding, conversions, percents) in your head when you can...

math
How can I solve a 27 X 18 in my head without pencil and paper.

math
how can I solve in my head which digit represents the hundreds place in 3250.136

math
How to solve in my head without using paper for uil number sense How about an addition problem for example 33 + 23.

math
In UIL number sense can someone tell me how to quickly solve the following type problem in my head. I know how to do it on paper, but paper is not allowed in number sense. 79-26

math
Rounding help please! How do I get a child to understand that when rounding to the nearest 100 for example 543 the child doesn't understand that number is between 500 and 600 and not 100 and 200 or something like that. Thanks any help would be appreciated.

math
Looking for a way to explain rounding to a third grader. The child gets the 0-4 round down and 5-9 round up, but for example 549 rounded to the nearest 100 I can't get that the number is between 500 and 600. Any suggestions would be appreciated.

Math
I have another question-Mr. Burns ran 14 miles last week. He only ran on Monday, Tuesday, and Wednesday. If Mr. Burns ran 3 miles on Tuesday and 5 miles on Wednesday, then how many miles did he run on Monday? Could you explain how to get the answer please.

Math
Earl answered 2 more math questions correctly than Anna did. Anna answered 3 fewer questions thatn Juanita did. Juanita answered 21 questions correctly. How many questions did Earl answer correctly? Could someone explain how to get the answer. Thanks.

keyboarding
Which one of the following represents the correct format for the salutation of a letter that uses open punctuation? A. Dear Mr. Joseph Rodrigues, B. Mr. Joseph Rodrigues: C. Dear Mr. Rodrigues: D. Dear Mr. Rodrigues

keyboarding
Secretary A will use "Sincerely" as the complimentary closing of a letter to a colleague. Secretary B will use "Cordially" as the complimentary closing of a letter to a friend. Which secretary is using the correct closing? A. Neither secretary B. Both secr...

keyboarding
When creating a 20-page newsletter in which you want different margin settings and other page formats within the multipage document, which one of the following Word features should you use? A. Styles B. Formatting C. Unequal columns D. Sections

keyboarding
12. What word processing feature protects against printing the last line of a paragraph at the top of the next page? A. Hard Page Break B. Merge Cells C. Widow/Orphan Control D. Wordwrap

keyboarding and word processing
11. Carter must inform employees at Benton Industries of the details of the company's annual summer picnic. The best document format for him to use to announce this one event is a/an A. block letter. B. brochure. C. memorandum. D. short report.

keyboarding and word processing
do anyone have the correct answer to exam 986131 for pennfoster key boarding and word processing.

nonfiction
matthias is a example of

science
Which properties are most useful to identify a mineral? Explain

earth
How does time affect crystals?

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