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Questions Asked on December 5, 2011

Write a net ionic equation to show that ascorbic acid, H2C6H6O6, behaves as an acid in water. Consider only its first ionization
1. 1 answer
2. asked by Seep
3. 5,733 views
One-half of the world’s energy comes from which source?A. hydroelectric power B. fossil fuels C. nuclear energy D. solar
1. 2 answers
2. asked by lola
3. 4,068 views
Which of the following would NOT encourage a population to experience exponential growth?a constant birth rate b surplus of food
1. 9 answers
2. asked by lola
3. 3,798 views
A 35.0 ml sample of 0.225 M HBr was titrated with 42.3 ml of KOH. What is the concentration of the KOH?
1. 2 answers
2. asked by Anonymous
3. 3,772 views
The molarity of a solution prepared by dissolving 15.0 grams of NaCl in 100 mL water is 0.15 M.True or False
1. 2 answers
2. asked by Anonymous
3. 3,605 views
The solubility of solid Ce(IO3)3 in a 0.20 M KIO3 solution is 4.4 10-8 mol/L. Calculate Ksp.
1. 1 answer
2. asked by Bill
3. 3,353 views
5. A particle moves along the x-axis in such a way that its position at time t is given by x=3t^4-16t^3+24t^2 for -5 ≤ t ≤
1. 1 answer
2. asked by fareha
3. 3,314 views
A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and
1. 1 answer
2. asked by Bill
3. 3,169 views
What was the time of greatest population growth in the world?A. the late nineteenth century B. the mid-seventeenth century C.
1. 4 answers
2. asked by lola
3. 3,105 views
A hockey player strikes a puck that is initially at rest. The force exerted by the stick on the puck is 950 N, and the stick is
1. 2 answers
2. asked by glenmore
3. 3,080 views
I do not understand the answer that was given to me on a post dated Nov. 23.Please help explain my questions that appear at the
1. 1 answer
2. asked by Bart
3. 3,025 views
The mass of a certain neutron star is5 × 10^30kg (2.5 solar masses) and its radius is 2000 m. What is the acceleration of
1. 1 answer
2. asked by Amanda and Leah
3. 2,918 views
Which of the following statements is true?a. Political parties are unimportant in the organization of the U.S. Congress. b.
1. 3 answers
2. asked by HM
3. 2,913 views
1. A rectangle has a constant area of 200 square meters and its length L is increasing at the rate of 4 meters per second.a.
1. 1 answer
2. asked by fareha
3. 2,782 views
Given the following equation: N2(g) + 3H2(g) = 2NH3(g).Determine to one decimal place the molar mass of each term, and WRITE
1. 2 answers
2. asked by Kate
3. 2,628 views
One of the steps in the Ostwald process for the production of nitric acid involves oxidation of ammonia.4NH3 (aq) + 5O2 (g)
1. 1 answer
2. asked by Ahmed
3. 2,394 views
A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3?how did you get the answer
1. 3 answers
2. asked by DIANA
3. 2,198 views
a man applies a force of 220 N horizontally to the right against a 50 kg crate. the force of friction between the crate and the
1. 3 answers
2. asked by Connor
3. 2,153 views
1. Let y = f(x) be the continuous function that satisfies the equation x^4-5x^2y^2+4y^4=0 and whose graph contains the points
1. 1 answer
2. asked by fareha
3. 1,916 views
Preterite or imperfect?CAPITALIZED WORDS Hace muchos años, HAY (1) una muchacha que se LLAMA (2) Cenicienta. Ella VIVE (3) en
1. 5 answers
2. asked by lil wayne
3. 1,859 views
Find the value of c that makes the expression a perfect square trinomial. Then write the expression as the square of a binomial.
1. 1 answer
2. asked by Erica
3. 1,839 views
A 116.9 g sample of nitric acid solution that is 70.0% HNO3 contains how many moles of HNO3?how did you get the answer
1. 1 answer
2. asked by diana
3. 1,836 views
Revolve the region bounded by y = 4x and y = x^2 about the y-axis. In cubic units, the resulting volume is
1. 1 answer
2. asked by Beth
3. 1,828 views
Two satellites A and B of the same massare orbiting Earth in concentric orbits. The distance of satellite B from Earth’s
1. 1 answer
2. asked by idiot
3. 1,807 views
17 liters of a gas is at an initial temperature of 67 degrees C and a pressure of 88.89 atm, what will be the pressure of the
1. 1 answer
2. asked by Anonymous
3. 1,768 views
Help w/Word Prob: LAW ENFORCEMENT A police accident investigator can use the formula s=2√5l to estimate the speed=s of a car
1. 3 answers
2. asked by Rock
3. 1,758 views
A Bronsted-Lowry acid is a proton donor. True or False
1. 3 answers
2. asked by Anonymous
3. 1,626 views
Which reaction illustrates water acting as a Bronsted Lowry base?
1. 1 answer
2. asked by Anonymous
3. 1,558 views
A rectangle garden is 30 ft by 40 ft. Part of the garden is removed in order to install a walkway of uniform width around it.
1. 6 answers
2. asked by Kelly
3. 1,516 views
4. Given the function f defined by f(x) = cos2x for -π≤ x ≤πa. Find the x-intercepts of the graph of f. b. Find the x and
1. 1 answer
2. asked by fareha
3. 1,432 views
6. A trough is in the shape of a triangular prism. It is 5 feet long and its vertical cross sections are isosceles triangles
1. 1 answer
2. asked by fareha
3. 1,373 views
if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=
1. 1 answer
2. asked by jason
3. 1,372 views
A tank is full of water. Find the work W required to pump the water out of the spout.r=6 h=3
1. 1 answer
2. asked by Courtney
3. 1,341 views
Two trains depart at the same time from the same station and travel in opposite directions. One train travels 25 mph faster than
1. 1 answer
2. asked by John
3. 1,313 views
A model of the ocean floor takes up 2/5 of the space in an aquarium. if 3/8 of the model is coral, what fraction of the space in
1. 4 answers
2. asked by Stevie
3. 1,312 views
An equilateral triangle has a perimeter of 33 inches. What would the perimeter of a square whose sides each measure the same
1. 1 answer
2. asked by chanelle
3. 1,311 views
One major reason for religion’s growing appeal in the 1950s was:1. the fire-and-brimstone style of television preachers 2.
1. 3 answers
2. asked by HM
3. 1,307 views
how do you find the orthocenter of a triangle with the vertices A(4,0) B(-2,4)C(0,6)? Please explain to me how you get x after
1. 1 answer
2. asked by Melanie
3. 1,304 views
If the government announced the economy is headed into an expansionary period of rising real GDP and prices, businesses would
1. 3 answers
2. asked by Sammy
3. 1,286 views
Kennedy’s inauguration is best remembered for:1. the list of promises in his speech 2. his elegant and inspiring rhetoric 3.
1. 2 answers
2. asked by HM
3. 1,270 views
On average, women earn about _____ as much as men.a. one-fourth b. one-half c. two-thirds d. three-fourths e. nine-tenths I have
1. 3 answers
2. asked by HM
3. 1,264 views
Blacks who moved north- 1945-1960?Blacks who moved to northern cities found: 1. inability to vote 2. quality public housing 3.
1. 2 answers
2. asked by HM
3. 1,262 views
Simplify the Factorial Expression.(3n+1)!*3!/(3n-2)!
1. 1 answer
2. asked by Robert
3. 1,251 views
Determine the [H3O+]. Are these solutions acidic or basic?a. [OH-]=7.0x10^-8 a. [H3O+]= acidic or basic? b. 0.00030 M Mg[OH]2 b.
1. 2 answers
2. asked by Amanda
3. 1,239 views
A square frame is made from four thin rods, each of length and mass Calculate its rotational inertia about the three axes shown
1. 1 answer
2. asked by omah
3. 1,190 views
The Ksp for silver sulfate (Ag2SO4) is 1.2 10-5. Calculate the solubility of silver sulfate in each of the following.0.30 M
1. 1 answer
2. asked by Bill
3. 1,184 views
What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?
1. 1 answer
2. asked by Richard
3. 1,164 views
What is the minimum amount of force required to move a 4000 pound truck that is resting on level ground? If 15000 N of force is
1. 1 answer
2. asked by Cody
3. 1,163 views
If there are 264 students in a school and there are 84 eighth graders and There are 22 fewer seventh graders than sixth graders.
1. 3 answers
2. asked by KC
3. 1,161 views
A fixed amount of gas initially at 100 K and pressure P1 is expanded from 1 L to 100 L in a piston. The temperature, T2, of the
1. 2 answers
2. asked by laura
3. 1,155 views
I understand there is a relationship between temperature & pressure. If a rigid open container was placed in a freezer at -15
1. 2 answers
2. asked by Mike
3. 1,155 views
ok I have a algebra question how do you find the missing number for 42-9=43-? how do I get the answer and I need to understand
1. 4 answers
2. asked by julie
3. 1,155 views
NaHCO3+CH3COOH→H2CO3+NaCH3COOthe mass of can changes after reaction, what would be a logical mass?
1. 1 answer
2. asked by johanna
3. 1,151 views
A 10.9-kg monkey climbs a uniform ladder with weight w = 1.24 102 N and length L = 2.70 m as shown in the figure below. The
1. 0 answers
2. asked by Anonymous
3. 1,136 views
1 gram of C3H8 gas and 1 gram of O2 gas are delivered to a metal sphere with a fixed volume of 1 L. After the two gases are
1. 1 answer
2. asked by laura
3. 1,114 views
Toward the end of the Eisenhower presidency, the country could celebrate:1. the addition as states of Alaska and Hawaii 2. the
1. 3 answers
2. asked by HM
3. 1,112 views
Will a precipitate form when 100.0 mL of a 7.5 10-4 M Mg(NO3)2 is added to 100.0 mL of 5.8 10-4 M NaOH? (Hint: Ksp for Mg(OH)2 =
1. 1 answer
2. asked by Bill
3. 1,110 views
You have 11.20 grams of a compound. It is known that the compound has a half-life of 3.8 days. How long will it take for the
1. 1 answer
2. asked by Anonymous
3. 1,100 views
a point charge q1= -4.00nC is at a point (0.6,0.8) in the xy axis, and a second point charge q2=4.73nC is at the point (0.6,0),
1. 0 answers
2. asked by mo
3. 1,097 views
Blacks who moved to northern cities found:1. inability to vote 2. quality public housing 3. acceptance and respect 4.
1. 1 answer
2. asked by HM
3. 1,092 views
Which of the following is not one of the elements for which the United States could be considered the strongest of the economic
1. 3 answers
2. asked by HM
3. 1,090 views
Joe stands on a bridge kicking stones into the water below. If he kicks a stone with a horizontal velocity of 3.10 m/s, and it
1. 1 answer
2. asked by bekah
3. 1,081 views
Government can lawfully prevent a political rally from taking placea. under no circumstances; people have an unconditional right
1. 2 answers
2. asked by HM
3. 1,074 views
I solved one of these sigma notations and had Reiny check it in an earlier post but this one totally befuddles me-Which of the
1. 5 answers
2. asked by Julia
3. 1,074 views
Two trains depart at the same time from the same station and travel in opposite directions. One train travels 25 mph faster than
1. 1 answer
2. asked by John
3. 1,069 views
A 0.0097561 g quantity of an unknown gas occupies 0.2 L at 500 K and 2 atm. What is the Molecular Weight (MW) of the gas ?
1. 1 answer
2. asked by laura
3. 1,064 views
Liam fires a bullet into a block suspended by two cables, embedding the bullet in the block. The mass of the bullet is 5g and
1. 1 answer
2. asked by Hester
3. 1,060 views
find a quadratic function that fits the set of data points (1,4) (-1,6) (-2,16)
1. 1 answer
2. asked by Anonymous
3. 1,050 views
In relation to society’s prevailing values in the 1950s, most teens tended to be:1. supportive 2. critical 3. uncaring 4.
1. 4 answers
2. asked by HM
3. 1,041 views
The standard enthalpy of formation of n-octane is -249.95 kJ/mol. Compute the amount of heat liberated when 5.24 g of n-octane
1. 2 answers
2. asked by LaurenB
3. 1,034 views
Hello. I'll be very grateful for your help.1)Is it possible to use "involve" in the context "This step could involve a serious
1. 1 answer
2. asked by Ilma
3. 1,026 views
How can we determine which of our traits are dominant or recessive?
1. 1 answer
2. asked by M.
3. 1,016 views
30.0 g CuO + 20.0 g CH4 can produce a maximum of __?__ g Cu. 4 CuO + CH4 „_ 2 H2O + 4 Cu + CO2
1. 1 answer
2. asked by Anonymous
3. 1,010 views
A scuba diver takes a 2.8 L balloon from the surface where the pressure is 1.00 atm and the temperature is 34.0 °C to a depth
1. 2 answers
2. asked by Anonymous
3. 1,006 views
The pH of an HCl solution is found to be 1.74. Therefore the [H3O+] is:
1. 2 answers
2. asked by Anonymous
3. 983 views
How many grams of chlorine are needed to make 5.00 X 10^6 g of a solution that is 1.50 ppm chlorine by mass?
1. 1 answer
2. asked by Sam
3. 979 views
okay heres the question and the answer I have, but Im not sure its right because the values seem way too high to interpet what
1. 1 answer
2. asked by Stumped again
3. 972 views
Kennedy’s successor as president, Lyndon Johnson:1. like Kennedy, had been born into wealth and privilege 2. was a fairly
1. 1 answer
2. asked by HM
3. 967 views
Women’s heights are normally distributed with a mean of 162 cm and standard deviation of 16 cm.a. Define an random variable,
1. 1 answer
2. asked by Jasmine
3. 962 views
if you are to be recognised and given an award, What would be most recognized for a year from now?
1. 1 answer
2. asked by Paris
3. 962 views
find d^2y/dx^2 of x^2/3 + y^2/3 =1(implicit differentiation)
1. 1 answer
2. asked by Anonymous
3. 950 views
What is the mass percent oxygen in the compound NaNO3?
1. 1 answer
2. asked by Anonymous
3. 947 views
Find the mechanical energy of a block-spring system having a spring constant of 0.93 N/cm and an oscillation amplitude of 4.2
1. 1 answer
2. asked by Javan
3. 946 views
need help for a school math project:adjusting a recipe amounts using fractions
1. 2 answers
2. asked by kris
3. 943 views
How can one find the magnitude and the directions of a resultant if Vector A is 35N @ 60' NE, and Vector B is 50N @ 20' NW?
1. 1 answer
2. asked by Megan
3. 942 views
Suppose the profit, π, from selling q items of a product is given by π(q) = 2.65q-1200.Find the value of π'(100).
1. 1 answer
2. asked by anonymous
3. 941 views
Surveys show that people who use calorie information to decide which foods to eat consume on average 100 calories less than they
1. 1 answer
2. asked by Anonymous
3. 935 views
One of Johnson’s major goals in Vietnam was to:1. keep the Soviets and Chinese from attacking elsewhere in Asia 2. use nuclear
1. 1 answer
2. asked by HM
3. 933 views
Government can lawfully prevent a political rally from taking placea. under no circumstances; people have an unconditional right
1. 0 answers
2. asked by HM
3. 927 views
What is the molarity of OH- in a 7.83×10-3 M NaClO solution that hydrolyzes according to the equation.ClO-(aq) + H2O(l) =
1. 1 answer
2. asked by Jay
3. 914 views
A CELL PHONE ORDDERS 500 NEW PHONES FROM A MANFACTURE.IF THE PROBABLITY OF A PHONE BEING DEFECTIVE IS 2.6% PREDICT HOW MANY OF
1. 1 answer
2. asked by devin
3. 913 views
. Determine which ratio forms a proportion with 2/7 by finding a common multiplier. (1 point)
1. 5 answers
2. asked by Regiana
3. 907 views
1.which directory does Vim to load color scheme?2.Set a key mapping in Vim and explain how it works? can someone help me with
1. 0 answers
2. asked by Tracy
3. 906 views
You have 26.44 mL of 1.83 M HCl in a beaker. You dilute this acid with 40.08 mL of water. When you analyze the solution you find
1. 1 answer
2. asked by Anonymous
3. 905 views
a metal crystallizes in the face centered cubic crystal structure with a unit cell edge of 5.48 x10 power of -8 cm. the density
1. 2 answers
2. asked by amanda
3. 905 views
Major shifts in the Supreme Court's positions have usually been due toa. the pressure of public opinion. b. new developments
1. 3 answers
2. asked by HM
3. 900 views
The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school
1. 2 answers
2. asked by Anonymous
3. 897 views
find d^2y/dx^2 of dy/dx = -[y/x]^1/3
1. 1 answer
2. asked by Anonymous
3. 896 views
The solubility of gases in water decreases with increasing water temperature
1. 2 answers
2. asked by Anonymous
3. 895 views
A sample of gas has an initial volume of 2.80 L at 755 torr. If the volume of the gas is increased to 3.70 L, what will the
1. 1 answer
2. asked by Anonymous
3. 884 views

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