# Marissa

Popular questions and responses by Marissa-
## College Chemistry

Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

*asked on September 23, 2010* -
## Home economics

List 10 careers in home economics

*asked on September 25, 2016* -
## Chemistry

three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa;

*asked on November 7, 2010* -
## English

Identify the sentence that is punctuated correctly. Question 32 options: a) Social issues involving computers and society are, privacy, unemployment and technological complexity. b) Social issues involving computers and society are privacy, unemployment,

*asked on January 27, 2020* -
## fibers and fabrics

Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber is

*asked on December 2, 2009* -
## Chem

Which one of the compond are covalent HF RbF LiF NaF

*asked on September 21, 2016* -
## English

Identify the correct sentence. Question 32 options: a) Not far from the studio is an Italian restaurant, a gas station, and a park that has a running path. b) Not far from the studio are an Italian restaurant, a gas station, and a park that has a running

*asked on January 28, 2020* -
## Chemistry

Consider the reaction 2H2O(g) → 2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If the increase in volume is 42.7 L against an external pressure of 1.00 atm, calculate ΔU for this reaction. (The conversion factor is 1 L · atm = 101.3 J.)

*asked on October 3, 2018* -
## dressmaking

Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would like you to make her a special silk blouse to replace a favorite blouse that has worn out.

*asked on December 2, 2009* -
## Physics

while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he

*asked on February 3, 2011* -
## Organic Chemistry

How would you expect the following series of compounds to compare in behavior for SN1 vs SN2? CH3CH=CHCH2Br CH3CH2CH2Br CH3C(-Br)=CHCH3 on the last one, Br is a substituent of the C and that C is double bonded to CHCH3 Please help! Even if someone could

*asked on November 26, 2008* -
## algebra

1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 an=a1+(n-1)d a20=3+(20-1)7 a20=3+(19)7 a20=3+133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

*asked on August 26, 2007* -
## English

Which of the following is not true? Question 30 options: a) Always capitalize specific brand names. b) Capitalize names of specific places. c) Capitalize common nouns. d) Capitalize proper nouns. c.

*asked on January 27, 2020* -
## Physics - Electric Field

Find the electric field at a point midway between 2 charges of +40.0e-9 C and +60.0E-9 C separated by a distance of 30.0 cm. My work: q1=40E-9 q2=60e-9

*asked on March 23, 2015* -
## Chemistry, acids and bases

(a) Find pH and pOH of 1.0 M solution of sodium benzoate, NaC6H5COO. (Ka of benzoic acid is 6.2x10^-5) (b) Calculate pH after 0.205 moles per liter of HCl was added (assume volume does not change (c) Calculate pH after 1.0 moles per liter of HCl was added

*asked on May 6, 2008* -
## english

Which type of faulty logic appears in this sentence? Dr. Bishop has never performed a surgery before, so he must not be equipped to be a good surgeon.

*asked on April 25, 2016* -
## Chemistry

At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this

*asked on April 7, 2015* -
## Math

What number is 1,000,000 greater than 337,676

*asked on August 26, 2014* -
## Chemistry

Your space ship has docked at a space station above Mars. The temperature inside the space station is 24oC at a pressure of 745mmHg. A balloon with a volume of 425mL drifts into the airlock where the temperature is -95oC and the pressure is 0.115 atm. What

*asked on November 14, 2013* -
## algebra

1)Write an equation for the parabola whose vertex is at (-8,4) and passes through (-6,-2) answer=y=-3/2(x+8)^2+4 2)Solve x^2>_2x+24 answer=x_6 #1, ok #2, ok

*asked on August 14, 2007* -
## Algebra

State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no

*asked on August 10, 2007* -
## Chemistry

Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 What is the maximum

*asked on November 15, 2016* -
## physics

Two canoeists start paddling at the same time and head toward a small island in a lake. Canoeist 1 paddles with a speed of 1.40m/s at an angle of 45 degrees north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 km due east

*asked on September 24, 2014* -
## ap biology

What barriers might hinder the acquisition of plasmids?

*asked on April 8, 2014* -
## Physics

The lower frequency limit for human hearing is usually considered to be 20.0 Hz. (a) What is the speed of sound in m/s if the air temperature is 20.0ºC? (b) What is the corresponding wavelength for this frequency?

*asked on October 8, 2013* -
## Math

Write each rate as a fraction in lowest terms 15 feet in 30 seconds

*asked on August 27, 2019* -
## Chemistry

When coal is burned, the sulfur it contains is converted into sulfur dioxide. This is SO2 is a serious pollutant, so it needs to be removed before it escapes from the stack of a coal fired plant. One way to remove the SO2 is to add limestone, which

*asked on November 15, 2016* -
## chemistry

An equilibrium is dynamic. true or false

*asked on December 17, 2014* -
## geometry

One endpoint and the midpoint of a segment are given. Find the coordinates of the other endpoint. Show all your work. A. Endpoint: (-1,9) Midpoint: (-9,-10) Endpoint: _______ B. Endpoint: (9,-10) Midpoint: (4,8) Endpoint: ________

*asked on September 11, 2014* -
## Accounting

During the week ended May 15, 2013, Scott Fairchild worked 40 hours. His regular hourly rate is $31. Assume that his earnings are subject to social security tax at a rate of 6.20 percent and Medicare tax at a rate of 1.45 percent. He also has deductions of

*asked on April 15, 2014* -
## Physics

A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. The river current is due east. The man starts across, rowing steadily at 2.50 m/s and reaches the other side of the river at point C, 150 m downstream

*asked on February 2, 2014* -
## math

The greatest common factor of 2 numbers is 14, the least common multiple is 168. If the 2 numbers are not 14 and 168, what is the sum?

*asked on May 13, 2013* -
## Physics- Exercise 10

A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of

*asked on February 3, 2011* -
## algebra

how many quarts of pineapple juice should Theo add to a 20% pineapple drink to create 5 quarts of a 50% pineapple juice mixture?

*asked on October 20, 2009* -
## Math

Have to do an enlargement project and enlarge an everyday item by 10 times it original size. Part of grade is level of difficulty so do not want to do something simple. Older sister did a lego piece. Need some good ideas on a item and am stumped!

*asked on March 6, 2009* -
## math

1)The area A of a triangle varies jointly as the lengths of its base b and height h. If A is 75 when b=15 and h=10,find A when b=8 and h=6 2)Determine the equation of any vertical asymtotes of the graph of f(x)=2x+3/x^2+2x-3 1) Area of a triangle is 1/2

*asked on August 21, 2007* -
## Psychology

Recent research found that vulnerable youth who participate in positive extracurricular activities in high school were more likely than non participants to

*asked on December 12, 2019* -
## Trigonometry

A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive substance remain after 9 days.

*asked on April 13, 2018* -
## Chemistry

How many moles of water vapor react to yield 546.234 moles of hydrogen?

*asked on November 17, 2016* -
## Chemistry

Write a conversion factor that could be used to convert between moles of methane and moles of hydrogen

*asked on November 17, 2016* -
## Chemistry

What is the maximum mass of cobalt (II) phosphate that will precipitate from a solution prepared by adding an excess of K3PO4 solution to 100.0 mL of 5.0 M CoCI2? Sorry for all the confusion with different names we are working in a group and its easier to

*asked on November 16, 2016* -
## Chemistry

A precipitation reaction takes place when a water solution of potassium phosphate, K3PO4, is added to a water solution of cobalt (II) chloride, CoCl2 Write a balanced equation for this reaction

*asked on November 15, 2016* -
## Chemistry

Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 Explain why the oxygen

*asked on November 15, 2016* -
## calculus

what are the inflection points of 5x^2-45/x^2-25

*asked on November 23, 2015* -
## Chem

Can someone help with this one? Half life of 55Cr is about 2 hours. A sample of the isotopes delivered from the reactor to lab requires 12 hours. What is the minimum amount of material that should be shipped to get 1.0 mg of 55Cr. I said 32mg but I got it

*asked on April 23, 2015* -
## Chemistry

24.0 mL of a 2.4 M silver nitrate is mixed with 32.0 mL of 2.0 M sodium. Calculate the mass of precipitae formed. Calculate the concentration of all ions remaining in solution after the precipitate forms. I don't know how to start this or where to go with

*asked on April 7, 2015* -
## math

A support wire runs from the top of a tower to the ground. If the tower is 1200 feet tall and the wire is attached to the ground 500 feet away from the tower, how long is the support wire?

*asked on November 20, 2013* -
## math

jimmy is playing a dart game at an arcade. he can earn 2,3,or 6 points with each dart. she scored 24 points. how many ways could he score 24 points given that each dart thrown landed on the dart board?

*asked on May 22, 2013* -
## math

Rohnda is in charge of buying food for the school picnic, she found that hot dogs are in packages of 24, buns in packages of 18, ketchup in boxes of 12, and mustard in boxes of 15. what is the least number of students that can be feed if each student

*asked on May 13, 2013* -
## physics

a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

*asked on November 20, 2011* -
## Spanish 8th grade

I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little

*asked on October 12, 2011* -
## Math- Calculus

Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1

*asked on April 19, 2011* -
## math

If the true population standard deviation was known to be 3.0, then approximately what minimum sample size would you need in a simple random sample if you want a 95% confidence interval for the mean to have a margin of error of .5 or less?

*asked on April 14, 2011* -
## math

Find a polynomial f(x) with leading coefficient 1 and having the given degree and zeros. Each polynomial should be expanded from factored form, simplified and written in descending order of exponents on the variable. For example: (x+5)(x-2) should be given

*asked on April 12, 2011* -
## Chemistry

Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.

*asked on November 7, 2010* -
## Social studies

What were the economic, political, and social aspects of New Netherland, New Spain and New France?

*asked on October 17, 2010* -
## english

what are the literary devices in the song " if today was your last day" by nickelback?

*asked on February 15, 2010* -
## physics

when Chris slams a basketball he has a vertical leap of 1.46 meters. what must his initial vertical velocity be in order for him to reach this height?

*asked on December 9, 2010* -
## Physics

OK, so I'm having some serious problems with this one question. It's on relativity. Here it is: Calculate the mass of a proton (m0 = 1.67E-27 kg) whose kinetic energy is one sixth its total energy. How fast is it traveling? THANKS!!

*asked on April 19, 2009* -
## Physics

So I'm having some trouble with this problem.. Is there an equation or is it just a ratio? I'm having so many problems with this one! THANKS! What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 531

*asked on April 7, 2009* -
## Chemistry, reactions w/ water

Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) --> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) --> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) -->

*asked on May 6, 2008* -
## chemistry

ammonia, NH3, is a typical ingrediant in household cleaners. it is produced through a combination reaction involcing N2(g) and H2(g). if 12.0 mol of H2(g) react with excess N2(g), how many moles of ammonia are produced?

*asked on April 9, 2008* -
## algebra

1)Write an equation for an ellipse if the endpoints of the major axis are at(1,6)and (1,-6)and the endpoints of the minor axis are at (5,0)and (-3,0) answer= (x-1)^2/36+y^2/16=1 2)Which is the equation of an ellipse with center (-4,2)and a horizontal major

*asked on August 20, 2007* -
## Algebra

1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. answer=5 plus or minus the square root of 37 over 6 2)Use the discriminant to determine the number and type of roots for the equation 2x^2-7x+9=0 answer=2 complex 3)Identify the

*asked on August 12, 2007* -
## Algebra

Can someone please explain how to do these problems. 1)write a polynomial function of least degree with intregal coefficients whose zeros include 4 and 2i. 2)list all of the possible rational zeros of f(x)= 3x^3-2x^2+7x+6. 3)Find all of the rational zeros

*asked on August 10, 2007* -
## Algebra 1

In the formula A=P(1+r) t , p is the principle, r is the annual rate , A is the amount of years . An account waning 4% has a principal of $500000 . If no more deposits or withdrawals are made. ABOUT how much money will be in the account after 5 years

*asked on March 5, 2020* -
## Math

The sales tax rate for the state of Washington was 8.3%. What is the state sales tax on a $4,300 car in Washington? What is the final cost of the car, including tax?

*asked on August 27, 2019* -
## Calculus

Find a formula for a function of the form y=bxe−ax with local maximum at (0.5,0.3679). y=

*asked on October 11, 2018* -
## Math

Start at 500,crate a pattern that subtracts 4 from each number.Stop when you have 5 numbers

*asked on October 8, 2018* -
## History

The growing popularity of newspapers, magazines, and books in the United States during the 19th century contributed to which of these? The emergence of a uniquely American literary style The expansion of educational opportunities for women and minorities

*asked on April 3, 2017* -
## math

The position of a bucket falling down a well can be represented by the function h(t)=-16t^{2} where t is time in seconds and h(t) is measured in feet. Based on this function, what is the velocity of the bucket after it has fallen for 4 seconds?

*asked on February 27, 2017* -
## Chemistry

Write the symbol for the elements that fit the following descriptions 1. 10 electrons in each -3 ion 2. 18 electrons in each +2 ion 3. The alkaline earth metal in the third period

*asked on January 18, 2017* -
## Calculus

A rectangular tank with a square base, an open top, and a volume of 4,000 ft cubed is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. I'm not understanding how to get started and find the

*asked on December 5, 2016* -
## Chemistry

How many moles of hydrogen from when 10 moles of methane react completely?

*asked on November 17, 2016* -
## Chemistry

Calculate molarity of KNO3 solution if 69 g of salt are dissolved into 250 mL of solution

*asked on March 17, 2016* -
## Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

*asked on December 6, 2015* -
## Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

*asked on December 6, 2015* -
## Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

*asked on December 6, 2015* -
## Geometry

Given: BA is congruent to DC; BE is perpendicular to AC; DF is perpendicular to AC. Prove: BE is congruent to DF. The image is of rhombus ABCD. There is a segment connecting A and C with points E and F each about a third of the way into the segment.

*asked on November 10, 2015* -
## Math

A recipe calls for 2/3 cups chocolate but I'm only making a fourth of the batch how much chocolate what I need

*asked on October 8, 2015* -
## living skill

Calculating Voltage across a Resistor (Parallel Circuit and series circuit)

*asked on October 6, 2015* -
## MATH

Use the following time value of money tables to answer the following questions. Assume that the annual rate of interest is 6% for each of the four following problems. i = 6% Time Periods (n) Future Value of 1 Present Value of 1 Future Value of an Annuity

*asked on September 26, 2015* -
## math

find the percentile rank of 4.6 out of these numbers: 1.8, 2.5, 3.9, 4.6, 4.7, 4.8, 4.8, 4.9

*asked on September 23, 2015* -
## physics

A man cleaning his apartment pushes a vacuum cleaner with a force of magnitude 55.8 N. The force makes an angle of 15.3 ◦ with the horizontal floor. The vacuum cleaner is pushed 3.55 m to the right along the floor. Calculate the work done by the 55.8 N

*asked on July 24, 2015* -
## English

Would someone be willing to proof read my English essay? I proof read it but I don't know if I got all the mistakes.

*asked on June 4, 2015* -
## Ap chem

How would the addition of hydrogen gas at constant temperature and volume effect rate=k[h2][I2]?

*asked on April 23, 2015* -
## Chem

What is the order of rate = k[NO]2[Br2]. 2nd order?

*asked on April 23, 2015* -
## Chem

What would the unit be if you calculate the rate when A= 0.30 M and b= 0.30 M. I have the calculation done right and its 1.57 x 10 to the -3 but I don't know the unit

*asked on April 23, 2015* -
## Chemistry

Does a k constant have a unit?

*asked on April 23, 2015* -
## chemistry

16.5 mL of 2.5 M sodium sulfate is mixed with 35.5 mL of 4.5 M sodium nitrate. What is the concentration of all ions in the new solution?

*asked on April 7, 2015* -
## Math 222

I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g

*asked on February 19, 2015* -
## Physics

A baseball player slides into third base with an initial speed of 3.8m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

*asked on February 11, 2015* -
## Mechanics, Rigid body

At t = 0 s a flywheel is rotating at 20 rpm. A motor gives it a constant acceleration of 1 rad/s^2 until it reaches 100 rpm. The motor is then disconnected. How many revolutions are completed at t = 21 s? What I've done so far is multiply my 20rpm and

*asked on December 14, 2014* -
## History

What did the founding fathers of the United States create in order to ensure that one person did not ever have too much power in the government?

*asked on May 29, 2014* -
## science

if you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?

*asked on April 17, 2014* -
## Social Studies

What were the negative impact or effects of the Incas and Aztecs? Thank You

*asked on April 10, 2014* -
## Social Studies

Has the effort of Westerners to aid the rest of the world done more good than harm? Its a opinon but i would like a answer please. Please make your answer at least 6 sentences. Thank you very much

*asked on April 8, 2014* -
## algebra

. Mrs. Crenshaw has confiscated 4 cell phones from 4 different students because they used them during class. To get the cell phones back, they have to answer the fol- lowing question: What is the probability that no student receives his or her own phone if

*asked on March 10, 2014* -
## Statistics

I have 8 marbles: 3 blue, 1 green, 4v reds. What is the probability of selecting a blue marble twice with replacement and twice without replacement

*asked on March 8, 2014* -
## algebra

There is an 18 inch sandwhich that Jenny cuts and gives half of the sandwhich to Demi and Joel gets 3/4 of what jenny has. Add all up to 18

*asked on March 5, 2014*