Questions Asked on April 7, 2008

Is the solvation of borax in water an exothermic or endothermic process?i am thinking the it is endothermic...is that right?
1. 1 answer
2. asked by Riley
3. 3,105 views
A mirror on the passenger side of your car is convex and has a radius of curvature with magnitude 18 cm. (a)Another car is seen
1. 1 answer
2. asked by J
3. 2,813 views
Two forces of 50 and 70 N (newtons) act on an object. The angle between the forces is 40°. Find the magnitude of the resultant
1. 2 answers
2. asked by Julie
3. 2,513 views
Two cassettes and three cd's cost $175 while four cassettes and one cd cost $125.1)Given that one cassette cost $x and one cd
1. 4 answers
2. asked by rufus
3. 2,416 views
A solid uniform marble and a block of ice, each with the same mass, start from rest at the same height above the bottom of a
1. 2 answers
2. asked by Erin
3. 2,218 views
4. Write the expression for Ka for the ionization of acetic acid in water.
1. 5 answers
2. asked by Sarah
3. 2,203 views
State the amplitude of the following function:f(x)= 5 x sin(2x)
1. 3 answers
2. asked by Daisy
3. 1,786 views
What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5?I have a pOH of 2.5 to get
1. 2 answers
2. asked by Dustin
3. 1,696 views
a sound wave of frequency 500 hz travels from air into water. the speed of sound in air is 330 m s-1 and in water 1490 m s-1.
1. 3 answers
2. asked by sake
3. 1,627 views
1)A convex mirror of focal length 10 cm forms an upright and magnified image of a real object placed at a distance of 20 cm from
1. 1 answer
2. asked by Jon
3. 1,608 views
1.How many vibrations per second are represented in a radio wave of 101.7 MHz2.The speed of a wave on a string depends on: a.the
1. 2 answers
2. asked by Chris Adison
3. 1,589 views
Guy $1.00=US $0.01 and EC $1.00 =US $0.37Calculate the value of: 1)Guy $60,000 n US $ 2)US $925 in EC $
1. 2 answers
2. asked by rhonda
3. 1,570 views
a ship sends a snoar pulse of frequency 30kHz and duration 1.0 ms towards a submarine and receives a reflection of the pulse 3.2
1. 4 answers
2. asked by sake
3. 1,570 views
true or false:all parallelograms have opposite angles that are supplementary
1. 2 answers
2. asked by kayley
3. 1,532 views
Methanoic acid HCO2H(aq) also known as formic acid, is partly responsible for the characterisitic itchy rash produced by the
1. 4 answers
2. asked by Sarah
3. 1,520 views
Ch3Ch2Ch2MgBr + H2O =I just need to complete the reaction not balance it.
1. 1 answer
2. asked by dan
3. 1,457 views
A boy is blowing a whistle of frequency 536 Hz and walking toward a wall with a speed of 1.64 m/s. What frequency of the
1. 3 answers
2. asked by Jon
3. 1,424 views
Calculate the pH of the following aqueous solution:1.00 mol/L sulfuric acid, H2SO4(aq) H2SO4 ==> H^+ + HSO4^- 100% HSO4^- ==>
1. 2 answers
2. asked by Sarah
3. 1,369 views
Please check my work, thank youIf $7,800 is deposited into an account paying 6% interest compounded annually (at the end of each
1. 1 answer
2. asked by Terry B
3. 1,366 views
Susan has $25. She is going to spend $4 on a book, then $3 per day on lunch.a)Write an equation that represents the following
1. 3 answers
2. asked by sam
3. 1,344 views
A 0.25 mol/L solution of benzoic acid, KC7H5O2 and antiseptic also used as a food preservative, has a pH of 2.40. Calculate the
1. 5 answers
2. asked by Dustin
3. 1,323 views
1)As a sound source moves away from a stationary observer, the number of waves will.decrease 2)How fast should a car move toward
1. 4 answers
2. asked by Jon
3. 1,303 views
could some body please check this for me?1. find the exact coordinates of the centroid of the region bounded by y-x^2, the x
1. 1 answer
2. asked by tia
3. 1,246 views
need answer to these questions:2. Why is the picture of Earth taken on Dec. 11, 1972 the most commonly published photograph in
1. 7 answers
2. asked by bill
3. 1,226 views
Find the unit price (cost for 1 ounce), to determine which is the best buy on pasta sauce? (1 qt = 32 oz).a) 1 qt for $1.29 b)
1. 1 answer
2. asked by Lisaraye
3. 1,203 views
the line " I wandered lonely as a cloud" is an example ofA. a metaphor B. a simile c. a couplet d. alliteration
1. 2 answers
2. asked by tonya
3. 1,187 views
Caclulate the Ka of nitrous acid if a 0.200 mol/L solution at equilibrium at SATP has a percent ionization of 5.8%ka=(H+)(NO2-)/
1. 2 answers
2. asked by Dustin
3. 1,182 views
Find the period and, where appropriate, the amplitude of the following function:y=2sin(x)
1. 4 answers
2. asked by Daisy
3. 1,112 views
Factorise completely:1)3g-3t+2mg-2mt 2)3x squared + 2x-8 3)3x squared-27
1. 2 answers
2. asked by mark
3. 1,109 views
Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The
1. 1 answer
2. asked by Ross
3. 1,092 views
How do you say I am hungry in the morning?Is it, J'ai faim du matin.
1. 2 answers
2. asked by janice
3. 1,071 views
I have read many, many books and was wondering does anybody have a suggestion of a book I may be interested in?I am an 8th
1. 3 answers
2. asked by BBnewgo
3. 1,064 views
Elly writes the following expression on the blackboard.(13+24)+0+7 Use three properties of addition to simplify the expression.
1. 2 answers
2. asked by Busy 6
3. 1,030 views
A tax imposed on a market with an inelastic demand and an elastic supply with cause:A)sellers to pay the majority of the tax
1. 1 answer
2. asked by G
3. 996 views
1)A convex lens is used to obtain an enlarged virtual image.false. 2)The lens of the eye has a fixed focal length. false.
1. 1 answer
2. asked by Jon
3. 989 views
1)As a sound source moves away from a stationary observer, the number of waves will.A)increase B)decrease C)remain the same
1. 1 answer
2. asked by Jon
3. 978 views
The economy is influenced by many factors that determine its surplus or deficit.Throughout the last several decades, we have
1. 2 answers
2. asked by rose
3. 972 views
Which sentence is written correctly?1. A mother and two children become one of those victims. 2. A mother and two children
1. 2 answers
2. asked by Amanda
3. 964 views
A solution is made by mixing 25.0 mL of toluene C6H5CH3 d=0867gmL with 135.0 mL of benzene C6H6 d=0874gmL . Assuming that the
1. 1 answer
2. asked by Riley
3. 944 views
1)As a sound source moves away from a stationary observer, the number of waves will.A)increase B)decrease C)remain the same
1. 5 answers
2. asked by Jon
3. 932 views
A student prepares a 0.20 mol/L aqueous solution of ascorbic acid and meausres its pH as 2.40. Based on theis evidence, what is
1. 3 answers
2. asked by Dustin
3. 925 views
why do some M&M dye's travel farther than others when placed in water?
1. 1 answer
2. asked by Jordan
3. 920 views
how have cuban painters influencd the Hispanola (Haiti and Dominican Repoublic) cultures?
1. 0 answers
2. asked by Jen
3. 907 views
A series of small packages are being moved by a thin conveyor belt that passes over a 300-mm radius idler pulley. The belt
1. 4 answers
2. asked by Hal
3. 883 views
the problem is2cos^2x + sinx-1=0 the directions are to "use an identity to solve each equation on the interval [0,2pi). This is
1. 3 answers
2. asked by alex
3. 881 views
3 Fe2O3 + 1 CO → 2 Fe3O4 + 1 CO2how many grams of Fe2O3 are needed to prepare 255 g of Fe3O4? a. 118 g b. 552 g c. 264 g d.
1. 1 answer
2. asked by Sarah
3. 870 views
What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5?Your response: [OH] = 1.0 x
1. 1 answer
2. asked by Dustin
3. 867 views
When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0320C .
1. 0 answers
2. asked by Riley
3. 860 views
Hello, Im new here and im having problems with my homework.I need to do these two things for different sources and i find it
1. 4 answers
2. asked by Bob
3. 858 views
Lactic acid, HC3H5O3(aq) is a weak acid that gives yougurt its sour taste(Yeeeeecccckkk). Calculate the pH of a 0.0010 mol/L
1. 1 answer
2. asked by Sarah
3. 852 views
i have to do this packet about magnetism, but we havent even learned anything about it yet. I have got some of the answers but i
1. 0 answers
2. asked by Emily
3. 839 views
PLEASE SHOW ME THE PROPER PLACES TO PUT THE COMMAS IN THIS SENTENCE:Athens a city in Greece named after Athena the Greek goddess
1. 3 answers
2. asked by Sydney
3. 802 views
I'm confused on when to use a two capital letters, two lowercase letters or one of each. This is for traits. We just started it
1. 1 answer
2. asked by Joe Smith Bob
3. 787 views
Solve the pair of simultaneous equationsx^2=4-y x=y+2
1. 1 answer
2. asked by candy
3. 782 views
Solid borax dissolves in water according to the equation:Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l) The sign of
1. 11 answers
2. asked by david
3. 780 views
When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is_C . (The freezing
1. 2 answers
2. asked by david
3. 766 views
Use the initial pH of the acetic acid solution to find the initial [H3O+] and initial [CH3COO-].I have an initial pH of 2.2
1. 1 answer
2. asked by Sarah
3. 729 views
Hi,I have to write a web article evaluation paper. The professor wants us to pick a casual article that has to do with child
1. 2 answers
2. asked by Bizzy
3. 729 views
An electron strikes the back of a TV screen at 1/10 the speed of light.What is the speed of the electron? What is the momentum
1. 2 answers
2. asked by Dana
3. 727 views
Poor teachern=6 m=6 SS=30 Avg teacher n=8 M=2 SS=33 Good teacher n=10 M=2 SS=42 N=42 G=72 Sigma squared= 393 *HOW DO I OBTAIN
1. 1 answer
2. asked by Genova
3. 712 views
When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0320C.
1. 1 answer
2. asked by Jessica
3. 712 views
Kevin and Zach are playing a number guessing game. Kevin says, "I am thinking of a number. If you double it and then subtract
1. 3 answers
2. asked by sam
3. 702 views
What is the coefficient of oxygen in the following equation for the reaction of potassium (K) with oxygen (O2) to form potassium
1. 3 answers
2. asked by Sarah
3. 686 views
Hi DrBob222,this is regarding my Determining Ka of Acetic acid lab I talked about on April 5, 2008. Refer to the volume of NaOH
1. 2 answers
2. asked by Sarah
3. 684 views
How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The
1. 1 answer
2. asked by Jon
3. 675 views
I question that 1+1=2. Prove to me that it does.For example I have one car and then buy another car. How many cars do I know
1. 1 answer
2. asked by Joe Smith Bob
3. 673 views
A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 16°C when it was installed. What is its
1. 1 answer
2. asked by Mitch
3. 662 views
Strychnine, C21H22N2)2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The
1. 3 answers
2. asked by Sarah
3. 656 views
Can someone check my answers.Write the following equations in standard form. 1) x^2 - 2x + y^2 + 4y = 11 answer: (x-1)^2 +
1. 3 answers
2. asked by Troy
3. 653 views
Hi i am doing a movie review on the film documentary "The Last Days" by James Moll. Could you help me find any footage from the
1. 1 answer
2. asked by Carol M
3. 651 views
A 59.0 -turn, 4.10-cm-diameter coil with R = 0.530 {\Omega} surrounds a 1.70-cm-diameter solenoid. The solenoid is 21.0 cm long
1. 4 answers
2. asked by Spencer
3. 650 views
Can you give me two examples of two realistic percent problems in which the percents are actually nice fractions and the numbers
1. 5 answers
2. asked by Mary
3. 644 views
What goes in the parentheses to do an in-text citation of a poem?
1. 7 answers
2. asked by Anonymous
3. 641 views
a genetisict studying coat color in animals crosses a male bunnicula having the genotype CC with a female having genotype Ccand
1. 1 answer
2. asked by Emily
3. 640 views
A person eats a container of yogurt. The Nutritional Facts label states that it contains 195 Calories (1 Calorie = 4186 J). What
1. 1 answer
2. asked by Mitch
3. 636 views
Need help with setting up an equation for this problem:A boat is sailing due east parellel to the shoreline at a speed of 10
1. 1 answer
2. asked by Sharon
3. 629 views
how do u state the period of a function?for ex. f(x)=sin((1/2)x)
1. 1 answer
2. asked by Daisy
3. 627 views
A 0.25 mol/L solution of benzoic acid, KC7H5O2 and antiseptic also used as a food preservative, has a pH of 2.40. Calculate the
1. 1 answer
2. asked by Sarah
3. 626 views
Please calculate the pH and [H+] of a 0.30 mol/L solution of butanoic acid,. The Ka of butanoic acid is 1.52 x 10^-5
1. 1 answer
2. asked by Ross
3. 617 views
Which of the following is NOT true of colligative properties? Colligative properties are...A. dependent on the mass of solute
1. 2 answers
2. asked by david
3. 611 views
I am new at debate and i need help on the new CX debate cause i have a 6 weeks grade and the teacher wont help me so i need help
1. 2 answers
2. asked by Samantha
3. 609 views
I'm confused on when to use a two capital letters, two lowercase letters or one of each. This is for traits. We just started it
1. 1 answer
2. asked by Human Traits
3. 607 views
If the critical angle for light at an interface between certain substances is 54.2 degrees, what is the polarizing angle at this
1. 3 answers
2. asked by J
3. 594 views
how will you apply the knowledge you have learned about effective business communication and cultural diversity to your current
1. 1 answer
2. asked by sugrbare24
3. 592 views
The minimum daily values (MDVs) for certain foods are given. They are based ona 2,000 calorie per day diet. Find decimal and
1. 6 answers
2. asked by Theresa
3. 585 views
Hi, I have to do a research paper on the movie "Bobby" directed by Emilio Estevez. I have to choose one character and apply two
1. 1 answer
2. asked by Marie
3. 581 views
How did cuban artists influence other cultures? what have Cuban artists given to the Hispanola(Haiti and Dominican Republic)
1. 1 answer
2. asked by Jen
3. 579 views
State the normal of a line that is parallel to 2x-4y+5
1. 1 answer
2. asked by Alex
3. 576 views
"Life begets life. Energy creates energy. It is by spending oneself that one becomes rich.”what does this quote mean??
1. 1 answer
2. asked by martin
3. 569 views
I am working on cross products of proportions. one question is 5/7 = 3w/21Can someone help?
1. 2 answers
2. asked by BBnewgo
3. 562 views
write as a single fraction the simplest form:3/x + 4/x+1
1. 1 answer
2. asked by sandra
3. 561 views
1)Specular reflection obey the laws of of reflection while diffuse reflection does not?false. They both obey 2)A convex mirror
1. 1 answer
2. asked by Jon
3. 560 views
given that R= 2p(squared) divided by Q-31)Calculate the value of R when P=6 and Q=12. 2)rearrange the formula to make Q the
1. 1 answer
2. asked by scott
3. 556 views
Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry).
1. 3 answers
2. asked by mary
3. 549 views
Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is $1000, but she has not charged
1. 0 answers
2. asked by Dena
3. 543 views
summary of a current issue between Native American and the federal goverment. Indentify the legislation that you think linked to
1. 0 answers
2. asked by Anna
3. 541 views
I asked about radians yesterday,you told me that a circle has 360 degrees or 2 pi radians, so:radians = 2.7*pi/180 Would the
1. 1 answer
2. asked by sue
3. 538 views
I need info. on the daily activities of a typical day for an educator (at the elementary or secondary level). The list and
1. 6 answers
2. asked by Dawn
3. 538 views
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move
1. 5 answers
2. asked by Alex
3. 535 views
If a mole can dig a mol of holes, how many holes can a mol of moles dig?a. 36 x 1023 b. 3.6 x 1047 c. 6 x 1024 d. 6 x 1046
1. 2 answers
2. asked by Sarah
3. 532 views

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