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Veronica

Questions and answers by Veronica, page 2

Questions (281)

If two car are traveling in opposite directions and have average speeds of 45 mph and 55 mph, what equation shows that the cars
1. 3 answers
2. 448 views
solve using the gauss-jordan method.x-2y+4z=7 -x+3y-z=-1 2x+y=-2 *I get through the first two columbs, but can't get the third
1. 4 answers
2. 460 views
write two situations that would use the numerical expression 27/9
1. 2 answers
2. 508 views
how to factor when there is not a 1 as a coefficient..for example 2x^2-x-5
1. 1 answer
2. 272 views
100g of a saturated solution of sodium nitrate at 43°C is cooled quickly with stirring to 10°C. How many grams of the solute
1. 3 answers
2. 533 views
A farmer’s harvest in bushels varies directly with the number of acres planted.A. Express in sentence form what this means to
1. 3 answers
2. 1,122 views
Problem 1 - Aunt Ethel's Fancy Cookie Company manufactures and sells three flavors of cookies: macaroon, sugar, and buttercream.
1. 1 answer
2. 811 views
Paint Express charges $30 per gallon of paint plus $1.10 per square foot of wall space. Color Creations charges $24 per gallon
1. 1 answer
2. 421 views
With regards to the mining and agriculture industry, in the nineteenth century, which of the followingstatements is false? A.
1. 4 answers
2. 392 views
An object is moving at constant velocity of 20m/s for 10 seconds. Find the acceleration during the 10 seconds interval?
1. 4 answers
2. 1,152 views
A Balloon Time® tank holds 15% excess capacity to fill 50 helium balloons measuring 9” or 0.5 ft3 in volume at 1 atm and 22
1. 1 answer
2. 418 views
ObjectivesTo determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in
1. 1 answer
2. 872 views
A hungry backpacker needs to boil 150 mL of water to prepare a cup of Ramen Noodles. The filtered river water is at a
1. 1 answer
2. 411 views
Compute the ƒ´Hrxn for the following:CH3OH „³ H2CO + H2 Carbon is the central atom on both the starting material and the
1. 1 answer
2. 356 views
Strontium metal is responsible for the red color in fireworks. Fireworks manufacturers use strontium carbonate, which can be
1. 3 answers
2. 2,388 views
Steve, in an attempt to impress his girlfriend, plops 18.2 grams of sodium metal into 500 mL of concentrated phosphoric acid
1. 1 answer
2. 389 views
Steve, in an attempt to impress his girlfriend, plops 18.2 grams of sodium metal into 500 mL of concentrated phosphoric acid
1. 1 answer
2. 409 views
What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine
1. 3 answers
2. 1,660 views
2Al(s)+3Cl2 = 2AlCl3Limiting Reactant is Cl with 0.329mol. What is the maximum mass of aluminum chloride that can be formed when
1. 3 answers
2. 2,188 views
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M CH3CO2H with 25.00 mL of 0.030 M CH3CO2Na? Assume that the
1. 3 answers
2. 1,338 views
The of hydroxylamine, , is . A buffer solution is prepared by mixing 120 of a 0.34 hydroxylamine solution with 60 of a 0.25
1. 2 answers
2. 480 views
Given the altitude of lakes in feet: –12, –9, –14, –39, –49, –49, –18, –43, find the mean, median, mode, and
1. 4 answers
2. 2,066 views
All sages provide both wisdom and inspiration. Since Dasha’s speech contained wisdom and greatly inspired her audience, Dasha
1. 2 answers
2. 621 views
Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday,
1. 3 answers
2. 1,143 views
A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the
1. 3 answers
2. 1,837 views
Prove that tanø is equal to U(k) when the block slides down the incline with a constant speed. (Use symbols, not numbers.)
1. 2 answers
2. 576 views
1. Find the vertex of the parabola: 4y^2+4y-16x=02. Find an equation of the parabola, opening down, with vertex (-3,1) and
1. 5 answers
2. 736 views
Simplify:A) log(x+1)+3logx B) 2log4np-3log4p C) 2ln(3x)+ln(5x)-ln6xy D) 22log10+log1000-log1
1. 3 answers
2. 421 views
If 150 mg of aspirin are rinsed with three portions of 10 mL of water at 25 degrees Celsius, how much aspirin is recovered?
1. 2 answers
2. 752 views
Manganese trifluoride, MnF3,can be prepared by the following reaction.2 MnI2 (s) + 13 F2 (g) ---> 2 MnF3(s) + 4 IF5(l) What is
1. 3 answers
2. 1,663 views
A sulfuric acid solution that is 65.0% H2SO4 by mass has a density of 1.55 g/mL at 20°C. What is the mass of h2so4 per liter of
1. 4 answers
2. 3,941 views
What is the mass percent of an aqueous sodium hydroxide solution in which the molality of NaOH is 6.25m? The density of the
1. 4 answers
2. 5,276 views
the solubility of 1-butanol in water is 7.9g per 100g of water. What is the maximum amount of 1-butanol that will dissolve in
1. 3 answers
2. 753 views
At 20°C, an aqueous solution that is 18.0% by mass in ammonium chloride has a density of 1.0512 g/mL What is the molarity of
1. 3 answers
2. 1,735 views
How many moles of KF are contained in 244 mL of 0.135 m KF solution? The density of the solution is 1.22 g/mL.
1. 7 answers
2. 3,343 views
How many grams of commercial C2H4O2 (97% pure by mass) must be allowed to react with an excess of PCl3 to produce 50.0g of
1. 1 answer
2. 483 views
The first order rate constant is 1.87 x 10^-3 min^-1 at 37°C for reaction of cisplatin. Suppose the concentration of cisplatin
1. 2 answers
2. 667 views
The potassium salt of benzoic acid, potassium benzoate, KC7H5O2, can be made by the action of potassium permanganate on toluene,
1. 4 answers
2. 3,720 views
dinitrogen pentoxide n2o5 decomposes by a first-order decomposition in chloroform solvent to yield NO2 and O2. The rate constant
1. 4 answers
2. 1,603 views
dinitrogen pentoxide n2o5 decomposes by a first-order decomposition in chloroform solvent to yield NO2 and O2. The rate constant
1. 3 answers
2. 1,182 views
I posted this question before and the answer is suppose to be 6.8 L but I keep getting 6.12 Ldinitrogen pentoxide n2o5
1. 3 answers
2. 1,227 views
A 0.500L vessel initially contains 0.0125 mol of H2S2 . Find the equilibrium concentrations of H2 and S2. Kc = 1.67 x 10^-72 H2S
1. 4 answers
2. 1,963 views
How many grams of pure H2SO4 can be obtained from 250 grams of iron ore if the ore is 82% FeS2? The reactions involved are given
1. 2 answers
2. 916 views
I posted this last night, A 0.500L vessel initially contains 0.0125 mol of H2S2 . Find the equilibrium concentrations of H2 and
1. 3 answers
2. 941 views
4x^3-6.68E-7x^2+1.67E-8x-1.04E-10 = 0
1. 1 answer
2. 338 views
4x^3-6.68E-7x^2+1.67E-8x-1.04E-10 = 0
1. 3 answers
2. 396 views
what volume (mL) of 0.0962M NaOH is required to neutralize 10.0mL of 0.128M H2SO4?I got 26.6mL
1. 3 answers
2. 866 views
Consider the following equilibrium. 2 SO2 (g) + O2 (g) 2 SO3 (g) The equilibrium cannot be established when __________ is/are
1. 3 answers
2. 785 views
what is the pH solution in which 15 mL of 0.10 M NaOH has been added to 25 mL of 0.10 M HCl
1. 3 answers
2. 969 views
A 0.411 g sample of powdered copper mixed with an inert, soluble additive was fully consumed by 23.4mL of 0.602M nitric acid,
1. 3 answers
2. 2,438 views
A solution buffered at a pH of 5.00 is needed in an experiment. Can we use acetic acid and sodium acetate to make it? If so, how
1. 3 answers
2. 1,056 views
I am really struggling with this question and my accounting book is no help at all.A company has $4500 in net sales, $3200 in
1. 2 answers
2. 487 views
When 3.00 moles of sodium are reacted with large amounts of chlorine gas 145.8 g of sodium chloride are produced determine
1. 2 answers
2. 537 views
Why are aboriginal clan systems considered human social systems?
1. 10 answers
2. 2,066 views
May you please tell me if these are true or false, if they are false then can I have the true statement, thank youIn the water
1. 3 answers
2. 742 views
1.)Why does the author of “Always to Remember” discuss Maya Ying Lin’s background?a.)to show that she experienced
1. 52 answers
2. 13,179 views
Should I be ashamed for being a poor writer and reader,since I am in 12 th grade this year?Today,in writing class I struggled..
1. 5 answers
2. 680 views
A 3kg mass is sliding across a horizontal surface at a constant speed while being pulled by rope with tension 20N held at a 53
1. 2 answers
2. 731 views
A uniform plank with mass 20kg and length 12m extends 2m over the edge of a building. A 40kg crate is slid out on the plank. how
1. 3 answers
2. 707 views
At a given time, Saturn was 9.1 x 10 to the 8th miles from the sun and the earth was 9.3 x 10 to the 7th miles from the sun. by
1. 4 answers
2. 3,261 views
Every year in Delaware there is a contest where people create cannons and catapults designed to launch pumpkins as far in the
1. 27 answers
2. asked by Veronica
3. 10,207 views
Explain how to solve the following system of equations. What is the solution to the system?2x+2y+z=-5 3x+4y+2z=0 x+3y+2z=1
1. 2 answers
2. 555 views
I need some help with this question I really don't understand it and some help going through this problem would be really
1. 4 answers
2. 556 views
With a known population mean of 100, and a known standard of error of the mean of 7.5, what is the probability of selecting at
1. 1 answer
2. 380 views
calculate the net force on an object that has a mass of 12kg and acceleration of 4m/sec
1. 1 answer
2. 348 views
John is doubling a cake recipe. The recipe calls for 1/4 cup of butter. How much butter should John use?
1. 5 answers
2. 740 views
A box weighing 180 newtons is hanging by rope as shown in the figure. Find the tension T¿.
1. 4 answers
2. 1,625 views
What is a way to boost your self-esteem?A.) Worry about other's opinions. B.) Exhibit risky behaviors. C.) Maintain a negative
1. 5 answers
2. 931 views
Donald's Jaguar loses value at 8% per year for the first nine years when should he sell it if he wants to receive 62% of what he
1. 1 answer
2. 313 views
The area of a rectangle is 247 cm^2. The width and length are both whole numbers greater than 1. What are the dimensions of the
1. 3 answers
2. 735 views
a yardstick, held vertically on a level surface, cast a shadow 1 foot5 inch long. Find the tangent of the angles that the rays
1. 3 answers
2. 580 views
How many grams of potassium nitrate, KNO3 are required to make 250 mL solution with a molarity of 0.40 M?
1. 3 answers
2. 1,994 views
Find the 5,550th term in the sequence4 1/2, 5, 5 1/2, 6, 6 1/2
1. 3 answers
2. 438 views
How is solving -4x=-4.8 different from solving -1/4x = -4.8? How are the solutions related?
1. 3 answers
2. 681 views
Rewrite: tan(cos^−1 (v)) as an algebraic expression in v.Please help me understand.
1. 3 answers
2. 1,150 views
A 56kg student runs at 5m/s, grabs a hanging rope and swings out over a lake. He releases the rope when his velocity is zero.
1. 4 answers
2. 2,497 views
A 56kg student runs at 5m/s, grabs a hanging rope, swings out over a lake. He releases the rope when his velocity is zero. The
1. 1 answer
2. 1,175 views
Is the tension on a rope zero just before a person releases it after swinging from one side of a river to the other?
1. 1 answer
2. 374 views
During each heart beat, approximately 70cubic cm of blood is from the heart at an average pressure of 105mmHg. Calculate the
1. 1 answer
2. 720 views
An air plane has a mass of (1.7x10 to power 6) kg, and the air flow past the lower surface of the wings at 95m/s. If the both
1. 2 answers
2. 799 views
Following are selected financial data in thousands of dollars for the Hunter Corporation. 2012 2011 Current assets $ 500 $400
1. 1 answer
2. 655 views
The product of two numbers is 48 and the sum of their reciprocal a is 1/3. Determine the value of the two numbers.
1. 1 answer
2. 376 views
When a 0.326 g sample of FeCl2·xH2O is heated to remove all water, a mass of 0.254 g remains. Determine the value of x.
1. 2 answers
2. 796 views
A 70kg wannabe stuntman at the edge of a roof top jumps vertical up with a speed of 4m/s and falls on a trampoline 2meters below
1. 3 answers
2. 518 views
A 70kg wannabe stuntman at the edge of a roof top jumps vertical up with a speed of 4m/s and falls on a trampoline 2meters below
1. 3 answers
2. 515 views
Which of the following compounds has an atom with an unfilled valence shell of electrons?A) H3O+ B) BF3 C) CH3OH D) NaI
1. 4 answers
2. 2,395 views
I'm struggling with being able to solve this question:A company wants to raise money in the capital markets. The firm intends to
1. 2 answers
2. 620 views
A teacher tallies up the grades on a math test in a class of 34 students, the results are A1, B11, C16, D3, F1. What is the
1. 2 answers
2. 509 views
find the equation of the straight line through A(3,20) which is perpendicular to the line passing through the points B(-2,8) and
1. 5 answers
2. 429 views
A rhombus ABCD has opposite vertices at A(-3,2) and C(9,-2). Find the equations of its diagonals. One of the other vertices is
1. 2 answers
2. 718 views
carmela cut a cake into 12 equal-sized pieces. She ate 2/12 of the cake and her brother ate 3/12 of the cake.What fraction of
1. 3 answers
2. 907 views
If 25 g of NH4Cl is dissolved at 80C, how many additional grams would be needed to make the solution saturated?
1. 3 answers
2. 1,666 views
STATE whether you expect the following entities to be in thermal equilibrium with their surroundings under normal circumstances.
1. 1 answer
2. 360 views
One day, a pharmacy school classmate gives you a sheet containing questions for an upcoming exam. How would you handle the
1. 1 answer
2. 414 views
How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine
1. 1 answer
2. 835 views
How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine
1. 1 answer
2. 1,294 views
What does "interactive effect" mean (in science)?I am a bit confused with this phrase, but how I interpreted it is that it
1. 1 answer
2. 518 views
For the statement:"Mail your transcripts immediately after the posting of your winter/spring grades." Does this mean mailing my
1. 1 answer
2. 384 views
Is this correct?"I'm at Seattle now."
1. 1 answer
2. 321 views
A population of 1000 individuals has 110 births and 10 deaths in a year. Its growth rate (r) is equal to?
1. 3 answers
2. 740 views

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