# Posts by Lisa

Total # Posts: 3,431

L.A
Abby it is B

MATHS
Pipe A can fill a swimming pool in 10 hours.Pipe B can fill the same pool in 8 hours. If pipe A and pibe B work together for the first 2 hours and then pipe B stops working, how long will it take pipe A to finish the job?

chemistry
Thank you very much!

chemistry
Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket fuel for the U.S. space program. Calculate ∆H for the synthesis of diborane from its elements, according to the equation 2 B (s) + 3 H2 (g) → B2H6 (g) using the ...

math
Need help with inequality. If pet store sells at least 3 times more male birds as female birds, and x represents female birds and y represents male birds. Would the inequality be written as y >=3 ? Why or why not? Thanks

chemistry
Thanks! Here's my answer, but I don;t know if it is correct: 5000KJ=50,000g/55.85 g/mol*25.08j/ mol k *(T high-15C); 5000kj=22452.99 (T high-15C); (T high-15C)=5000kj/22452.99J mol–1 K–1/1000, T high-15C=222.69, T high=22.69+15=238C

chemistry
Calculate the final temperature if 50 kg of iron is heated from 15.0°C with 5000 kJ of heat. The molar heat capacity of iron is 25.08 J mol–1 K–1.

Mat 116 - Algebra
Simplify x^2*x^3*x^4

Physics
A car accelerates at a rate of 5m/s2 for a period of 4.2 seconds and then moves at a constant speed for 8 seconds more. How far did it travel?

college/education
Why is if logical to write test items or assessments before producing instructional strategies

algebra 2
What is a quartic function with only the two real zeros given? x = -4, x = 1

math problem solving
joe has a collection of 35 dvd movies. he receives 8 of them as gifts. joe bought the rest of his movies over 3 yrs. if he bought the same number of movies each year, how many movies did joe buy last year?

chemistry
2Mg + O2 ==> 2MgO 1g Mg/24.3g=0.041 molMg, 0.041mol/2mol=0.0205 mol Mg; 0.5L O2/22.4L=0.0223 molO2; So Mg is the LR(0.0205mol Mg<0.0223 molO2); 0.041 molx40.3g MgO/mol=1.65g MgO2. 0.022molO2-0.0205molMg =0.0018 mol O2 inexcess. Thanks!

chemistry
0.041mol Mg-0.022mol O2=0.019mol Mg inexcess. Thank you!

chemistry
Thanks a lot! Here's original question: If 1.00 of magnesium is ignited in a flask containing 0.500 liter of oxygen at STP, how many grams of magnesium oxide are produced? My work: Mg + O2 ------> MgO2, is this right?

chemistry
Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L O2/22.4L=0.022 mol O2; ...

Chem
Mg + O2 ------> MgO if 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? what is the name and the amount of the reactant inexcess? My work: 1g Mg/24.3g=0.041 mol Mg; 0.5L O2/22.4L=0.022 mol O2...

math
total attendance is 520

math
3.75a + 2.50s = 1518.75 what is a and s equals to?

biology
Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram

i am good at English but every time we have a reading comprehension, i either fail it or get a bad mark. WHY. all i have to do is read it and answer question of what i just read. But i still get a bad mark. How can i prepare myself for the next one. i wan tot be good at it. By...

biology
Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram?

Geometry
By the water cooler in an office, there are conical paper cups. The radius is about 1.2 inches and the height is about 3.5 inches. How much water does the cup hold if it is filled to the top?

Math
5 Σ 4(3/4)^k k=0 Find the sum of the series. Round the answer to three decimal places.

PHI 208
Hill uses this technique in the middle of the article to examine ideas about the human’s place within nature A)He presents specific factual examples that demonstrate harm to the environment. B)He presents a fictional example of a perfect island. C)He asks the reader to ...

math
A fair 6 sided dice is marked with the numbers 1, 2, 3, 4,5, and 6. The dice is rolled three times and the results are added. How many different sums are possible?

math
Francis is baking cookies. The recipe for chocolate chip cookies calls for 2 2/3 cups of flour, the recipe for peanut butter coolies calls for 2.75 cups, the recipe for ginger snaps calls for 5/2 cups. If francis wants to use as little flour as possible, which cookie whould he...

math
An animal shelter has 24 large cages and 42 small cages that need to be cleaned. The director of the shelter wants to divide the work so that each person cleans the same number of large cages and the same number of small cages. What is the largest number of people he can use ...

health

lea
book title of the watsons go to birmingham 1963

algebra
For each of the rational functions find: a. domain b. holes c. vertical asymptotes d. horizontal asymptotes e. oblique asymptotes f. y-intercept g. x-intercepts 1. f(x)= x^2+x-2 / x^2-x-6

Geomatry
For each of the rational functions find: a. domain b. holes c. vertical asymptotes d. horizontal asymptotes e. oblique asymptotes f. y-intercept g. x-intercepts 1. f(x)= x^2+x-2 / x^2-x-6

science
Sarah wants to use a model to get an idea of how far away the stars are. She uses a marble to represent the Earth, and she places a basketball 1 m away to represent the Sun, which is the nearest star. If Sarah wishes to keep the distances between objects in her model at an ...

Maths
Angelo shot 4 darts at a target. Three landed in area A and one landed in area B giving him a total score of 16. Dan shot 4 darts too. One landed in A and three landed in B giving a total of 24. What score would be made hitting B three times?

L.A.Help!!!!!!
thank you reality check

Math
Find the exact value and approximate. 11^ -x+4 = 5^ 3x-2 (-x+4)log11 = (3x-2)log5

pharmacy math
Prepare 180 g of Lotrimin 0.05% cream. In stock, you have 200 g each of Lotrimin 0.025% cream and Lotrimin 0.1% cream. How much is needed of each?

chemistry
so what is the exact anwser?

Science
Calculate the kinetic energy change in the water that occurs when 10,000lb/hr flow in a pipe that is reduced from a diameter of 2 in. to a diameter to 1 in.

college math
1. A farmer has 1000 acres of land on which corn, wheat, or soybeans can be grown. He also knows that each acre of corn requires 5 days of labor and yields a profit of \$20. Each acre of wheat requires 9 days of labor and yields a profit of \$40. Each acre of soybeans requires ...

physics
Force constant= Force/ Extension = (1×9.8)/ (1/100) N/m =9.8×100=980N/m

chemistry
What does a slash (/) mean in chemistry?

math
how to write 15>3x into word problem?

Geography
A letter to the prime minister of India about sweatshops

English
what would a declarative sentence be? Would this be right It is a nice day today.

English
Hi Miss Sue, Here is the final draft can you check it for me? Thank you Dear Grandmother Irene Happy Birthday to you on this special day! Shine like a star today on your Birthday. Have a wonderful time at your Celebration Party. Wishing you all the best on your Birthday. How ...

English
Think I got it now is this right?

English
Miss Sue what would the sentence be May all your dreams come true be?

English
Miss Sue is this correct thank you

English
I'll be glad to comment on your sentences. • English - Lisa, Sunday, November 2, 2014 at 6:40pm Birthday Card Happy Birthday to you on this special day! (E) Shine like a star today. (D) How old are you today? (In) Have a wonderful time at your celebration party (Imp...

English
WHat would an imperative sentence be?

English
I think I need an imperative sentence?

English
thank you Miss Sue did I use all the four sentences?

English
Happy Birthday to you on this special day (E) Shine like a star today on you Birthday (D) How old are you today? (In) Have a wonderful time at your celebration party. can you help me out im struggling

English
MIss sue can you check this for me?

English
Birthday Card Happy Birthday to you on this special day! (E) Shine like a star today. (D) How old are you today? (In) Have a wonderful time at your celebration party (Imp) May all your dreams come true. Wishing you all the the best One year old and wiser!! Have a great day today

English
Need help writing a birthday card with 4 types of sentences? declarative, interrogative imperative and exclamatory?

chemistry
how many milliliters of10.0m Hc(aq) are needed to prepare 890.0 ml of 1.00m Hcl(aq)

Math
Worldwide annual sales of all cellphones were approximately −10p + 1,600 million phones when the wholesale price was \$p. At what wholesale price should cellphones have been sold to maximize annual revenue?

MATHS
Two yummy bars plus three delish bars cost a total of \$7.50. Three yummy bars plus two delish bars cost a total of \$8.00. How much does one yummy bar cost?

finance
(Defining capital structure weights) Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for \$400 million. Since the primary asset of this business is real estate, Templeton's management has determined that they will be able to ...

finamce
(Defining capital structure weights) Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for \$400 million. Since the primary asset of this business is real estate, Templeton's management has determined that they will be able to ...

physics
Object A with mass 6.7 kg is moving at 5.1 m/s. Object B with mass 7.4 kg is moving at 4.7 m/s. Object B impacts Object A, and they stick together. With what velocity do the objects move?

math
if you have a gas tank that is 37" X 10"X 121/2" how many gallons of gas will it hold ?

physics
A swing sits 5 m above the ground when it is still. John lifts the swing and releases it. At its lowest point, its velocity is measured to be 5.53 m/s. How high above the ground did John lift the swing?

Math
b is 10

History
What was Thomas Jefferson's stance about how when the government fails to protect their rights, it is their duty to overthrow the government and establish a government that is designed to protect their rights

English
What was Thomas Jefferson's stance on the Declaration of Independence? What is a pro and con of the Declaration of Independence Please Help Me

psychology
question 5 ansewer is c

Introductory Chemistry
Calcium chloride is 36.11% calcium by mass. How many grams of calcium are in 40.0 grams of calcium chloride

physics
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 13.6 m/s at an angle of 43.1° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...

physics
A meteoroid is speeding through the atmosphere, traveling east at 15.5 km/s while descending at a rate of 10.6 km/s. What is its speed, in km/s?

Organic Chemistry
If your carboxylic acid is benzoic acid, how many moles of benzoic acid are present in your sample (0.30g, and it is a mixture of three components of equal mass)?

Spanish
Write four different questions for the following sentences 1. Mariana canta en el coro (choir) de la universidad 2. Carlos busca el libro de arte 3. La profesora Gutierrez ensena contabilidad 4.Ustedes necesitan hablar con el profesor de economia

english
What does the term RACE mean in trying to do language homework?

math
BVFGTVSCJKEN M, BNSVBDFJB JKDGVKJ

Chemistry
Al and Fe react with HCl to produce a chloride salt and hydrogen gas. A .1924g sample of a mixture of Al and Fe is treated with excess HCl solution. A volume of 159mL h2 gas is collected over water at 19C and 841 torr. What is the mass percent by mass of Fe in the mixture? The...

Chemistry
A .7178 g sample of a hydrocarbon occupies a volume of 390.7 mL at 65C and 99.2kpa. When the sample is burned in excess oxygen, 2.4267 g CO2 and .4967g H2O are obtained. What is the molecular formula of the hydrocarbon? Write a plausible structural formula for the molecule. ...

english -MS. SUE
anything that you can be scared of

english -Ms.Sue????
?????

english
sorry but is there any other topics that i can relate the first one to?

english
what topics of fear can i relate the second quote to ?

english
we haven't really learned anything. we have to relate one of the quotes to any type of fear and right an essay about it.

english
oh okay thanks and also what does this quote mean "she tells everyone that a black guy stole the car...and at first everyone bought" what topicss of fear can this be related to?

english
i'm sorry but what does irrational fear of others mean?

english
what does this quote mean "we're not the bogeyman we're made out to be" and what topic of fear can this be related to?

Trig
A railroad tunnel is shaped like a semiellipse as shown below. A semiellipse is shown on the coordinate plane with vertices on the x axis and one point of intersection with the positive y axis. The height of the tunnel at the center is 27 ft and the vertical clearance must be ...

trig
karen, (who is 1,6m tall) wishes to calculate the height of a tall tree. she stands 50m from the base of the tree and measures its angle of elevation to be 36 degrees. determine the height of the tree?

Maths
Matt has a bag containing 12 green marbles and 8 blue marbles. Without looking, he pulls out one marbles and places it on the table. He then picks a second marbles from the bag. What is the probability he will have 2 blue marbles?

sociology
One who believes in a social contract theory would most agree with which statement? (Points : 1) people do not need laws to live harmoniously in society. humans make contracts in order to buy things. in order to establish society, humans agree to obey certain rules. the ...

economics
How to calculate item weight of an item

Chemistry
A portable electric water heater transfers 255 watts (W of power to 5.5 L of water, where 1 W=1J/s.How much time (in minutes) will it take for the water heater to heat the 5.5 L of water from 27∘C to 49∘C? (Assume that the water has a density of 1.0 g/mL.

chemistry
25.6mL of ethanol (density =0.789 g/mL) initially at 5.4∘C is mixed with 30.4mL of water (density = 1.0 g/mL) initially at 20.4∘C in an insulated beaker.Assuming that no heat is lost, what is the final temperature of the mixture?

chemistry
How many kilowatt-hours of energy are necessary to heat the air in the house from 9∘C to 30∘C? The heat capacity of air is 1.03 J/g∘C.A room contains 45kg of air.

chemistry
Calculate the final temperature of 30mL of ethanol initially at 15∘C upon absorption of 913J of heat. (density of ethanol =0.789 g/mL)

grammar and punctuation
The patient was taken to the operative suite, placed supine, anesthetized, and intubated in the usual fashion

Grammar
No

SCIENCE
A flask weights 46.8 g when it is empty and 121.6 g when filled with water. When the same flask is filled with another liquid, the mass is 91.2 g. What is the density of the second liquid?

science
Describe a fourth scenario in which either the Law of Conservation of Matter or the Law of Conservation of Energy could be observed. Using as many sentences as needed, describe how an experiment could be set up to further explore your recorded observation. The goal is to show ...

math
simplify with a positive number y^-9*y^3=

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