Archives
2010
October

Questions Asked on October 4, 2010

What is the net ionic equation for the precipitation of nickel sulfide from aqueous solution.
1. 2 answers
2. asked by Anonymous
3. 8,385 views
true or falseIf a net force acts on an object, the object's speed will change. An object's velocity will change if a net force
1. 3 answers
2. asked by molly
3. 7,199 views
A 4.691 g sample of MgCl2 is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in
1. 3 answers
2. asked by nalleli
3. 5,459 views
I need to find the ionic equation of:3Ba(OH)2(aq)+2H3PO4(aq)->Ba3(PO4)2+6H20(l) I'm totally lost on this question
1. 2 answers
2. asked by KELLY
3. 5,185 views
H2O (l) requires the largest amount of energy to raise the temperature of 25.0g H2O of the substance from 15.0 *C to 37.0 *C.
1. 1 answer
2. asked by Jack
3. 4,255 views
A shopper pushes a grocery cart 20m at constant speed on level ground against a 35N frictional force. He pushes in a direction
1. 2 answers
2. asked by Juliette
3. 4,103 views
Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of
1. 2 answers
2. asked by j
3. 3,954 views
Suppose you tried to combine 42 grams of magnesium with 45 grams of oxygen. Which of the two substances would be left after the
1. 7 answers
2. asked by Chris
3. 3,540 views
Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.
1. 4 answers
2. asked by Kelli
3. 3,003 views
Write a chemical equation for Sr(OH)_2(aq) showing how it is a base according to the Arrhenius definition.I came up with
1. 1 answer
2. asked by moe
3. 2,878 views
A laboratory has 60 cubic centimeters of a solution that is 40% HCI acid. How many cc of a 15% solution of HCI acid should be
1. 2 answers
2. asked by a
3. 2,665 views
NH4+ + OH- NH3 + H2OWhat is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
1. 3 answers
2. asked by Tiffany
3. 2,622 views
A car is traveling at 54.2 km/h on a flat highway. The acceleration of gravity is 9.81 m/s^2.PART 1: If the coefficient of
1. 2 answers
2. asked by Elizabeth
3. 2,245 views
A book weighing 20 N is placed on a table.How much support force does a table exert on the book? Answer in units of N. What is
1. 4 answers
2. asked by Wendia
3. 2,242 views
A ship leaves its home port expecting to travel to a port 500.0 km due south. Before it moves even 1 km, a servere storm blows
1. 2 answers
2. asked by Anonymous
3. 2,237 views
the difference between 2 numbers is 24. find the numbers if their sum is 88
1. 2 answers
2. asked by brian
3. 2,118 views
A car with an initial speed of 23.7 km/h accelerates at a uniform rate of 0.92 m/s^2 for 3.6s. Find the final speed and the
1. 2 answers
2. asked by Anonymous
3. 1,991 views
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of
1. 1 answer
2. asked by Ashley
3. 1,931 views
Why did the Moore family name their son Lester?Thank you in advance.
1. 4 answers
2. asked by Anonymous
3. 1,911 views
If the torque required to loosen a nut on the wheel of a car has a magnitude of 40.1 N*m, what minimum force must be exerted by
1. 3 answers
2. asked by Aslin
3. 1,856 views
EXPLAINA rubber ball (mass 0.30 kg) is dropped from a height of 1.2 m onto the floor. Just after bouncing from the floor, the
1. 1 answer
2. asked by Frankie
3. 1,755 views
a 28 ft rope is cut into 2 pieces. one is 3 feet longer than the other. how long are the pieces?
1. 2 answers
2. asked by mike
3. 1,634 views
A stream is 30. meters wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of
1. 2 answers
2. asked by elana
3. 1,583 views
How many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of products? 4HCl + O2 -->
1. 1 answer
2. asked by Jennifer
3. 1,581 views
Percentage of scores falling between a z-score of .54 and the mean.I can do the math, I just don't understand how to begin!
1. 1 answer
2. asked by bee
3. 1,580 views
A car with mass of 1875kg is traveling along a country road when the driver sees a deer dart out onto the road. The driver slams
1. 2 answers
2. asked by Shaila
3. 1,564 views
A spinning star begins to collapse under its own gravitational pull. Which one of the following occurs as the star becomes
1. 0 answers
2. asked by Franco Krause
3. 1,554 views
A chemical engineer determines the mass percent of iron in an ore sample by converting the Fe to Fe^2+ in acid and then
1. 1 answer
2. asked by KELLY
3. 1,549 views
One side of a triangle is 4 cm longer than the shortest side and 2 cm shorter than the longest side. The perimeter is 38 cm.
1. 2 answers
2. asked by Lily
3. 1,463 views
A 4kg wooden block is placed on a wooden table, so the coeficent of friction would be 0.2. There is a string connected to both
1. 0 answers
2. asked by Taylor
3. 1,403 views
A baseball is thrown up in the air from a height of 3 feet with an initial velocity of 23 feet per second. When does the
1. 4 answers
2. asked by Chandler
3. 1,396 views
A trailer mechanic pushes a 2500 kg car, home to a speed v, performing a job during the 5000 J. In this process, the car moves
1. 2 answers
2. asked by cls
3. 1,367 views
An old-fashioned single-play vinyl record rotates on a turntable at 40.0 rpm. What are (a) the angular velocity in rad/s and (b)
1. 1 answer
2. asked by Nony
3. 1,342 views
The hottest stars have surface temperatures of about 40,000 K. At what wavelength do they emit the most radiation?7.2 x 10E-6 cm
1. 2 answers
2. asked by Dre
3. 1,325 views
A number is multiplied by -3 and then this product is decreased by 7. The result is 4 less than twice the opposite of the
1. 4 answers
2. asked by Sally
3. 1,320 views
A block of weight w = 25.0 N sits on a frictionless inclined plane, which makes an angle = 25.0 with respect to the horizontal,
1. 0 answers
2. asked by michelle
3. 1,316 views
Would these be a redox reaction?CaO(s) + H2O(l) = Ca(OH)2(aq) 2FeSO4(aq) + 3H2O2(aq) = Fe2O3(s) + 3H2O(l) + 2SO42-(aq)
1. 3 answers
2. asked by edgar
3. 1,310 views
An arrow is shot a 30.0° above the horizontal. Its velocity is 49 m/s and it hits the target.a. What is the maximum height the
1. 1 answer
2. asked by John
3. 1,307 views
A car starts from rest on a curve with a radius of 150 m and accelerates at 1.50 m/s^2. How many revolutions will the car have
1. 1 answer
2. asked by Dan
3. 1,269 views
In the explosion of a hydrogen-filled balloon, 0.54 g of hydrogen reacted with 6.6 g of oxygen to form how many grams of water
1. 1 answer
2. asked by jeff
3. 1,268 views
Which of the following statements about special relativity is false?a).The proper length of an object is always larger than the
1. 0 answers
2. asked by Lexi
3. 1,253 views
At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without
1. 1 answer
2. asked by Kat
3. 1,247 views
BackgroundYou’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and
1. 1 answer
2. asked by Hyuna
3. 1,237 views
A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then
1. 1 answer
2. asked by May
3. 1,231 views
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a
1. 0 answers
2. asked by Jack
3. 1,227 views
what is the general formula for a hydrate?
1. 1 answer
2. asked by Danielle
3. 1,221 views
I tried doing this problem but couldn't get the right answer. I don't get how the answer is 2.19cm. Is the distance referring to
1. 2 answers
2. asked by flame
3. 1,169 views
if heat was added at a constant rate to the solid subsance, why did the temperature remain at 16 degree C for approximately 6
1. 2 answers
2. asked by amanda
3. 1,162 views
high fountain of water is located at the center of a circular pool. Not wishing to get his feet wet, a student walks around the
1. 3 answers
2. asked by Chloe
3. 1,155 views
A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion
1. 2 answers
2. asked by bryan
3. 1,151 views
11. Upon the death of Spitz in The Call of the Wild, Francois and Perrault decide that the new sled-team leader should be
1. 6 answers
2. asked by leyla
3. 1,149 views
What is the oxidation number of (NH4)2SO4
1. 1 answer
2. asked by KELLY
3. 1,147 views
why do you think jackson favored and benefited from the democratic expansion /that took place in the 1820's and 1830's
1. 4 answers
2. asked by mikki
3. 1,142 views
There are a total of 103 foreign language students in a high school where they offer only Spanish, French, and German.You are
1. 1 answer
2. asked by LEILA
3. 1,136 views
can someone please help me with this? i've been stuck on this one forever...A solution is made by mixing 25.0 mL of toluene
1. 1 answer
2. asked by Anonymous
3. 1,133 views
Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth.x: 23 17 12 35 29
1. 1 answer
2. asked by Stefania
3. 1,128 views
A golf club contacts a golf ball for 0.15s at an angle to the horizontal and the ball strikes the ground a distance away.
1. 1 answer
2. asked by Sherrie
3. 1,126 views
Need help with Analogies and suggest me other ways to write them please. Thank you for the help.1)Smart people keep quiet about
1. 0 answers
2. asked by Angelina
3. 1,123 views
Which metabolic category best describes Bacteria that act as decomposers?A) Chemoautotrophy B) Chemoheterotrophy C)
1. 0 answers
2. asked by Sarah
3. 1,112 views
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation:Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33-
1. 4 answers
2. asked by amber
3. 1,097 views
I need to be able to describe how to prepare 20 mL of a 0.0050 M KIO3 solution from a stock solution with a concentration of
1. 0 answers
2. asked by Kelli
3. 1,096 views
A 120 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the
1. 0 answers
2. asked by Kim
3. 1,084 views
Superwoman is hovering above the ground when a person free-falling goes by her at a terminal velocity of 140 km/h.
1. 0 answers
2. asked by Emily
3. 1,082 views
using numbers 1-12 make all sides of a square equal 26 using 4 numbers a time
1. 2 answers
2. asked by Anonymous
3. 1,081 views
What exactly is the Science of Biology??PLEASE SOMEONE HELP ME ANSWER THIS!! :)
1. 1 answer
2. asked by Malachi
3. 1,080 views
when 3 times a certain number is subtracted from 25,the difference is 28.what is the number?
1. 2 answers
2. asked by Carry
3. 1,077 views
Let f(x)=1x^3+2.5x+3. In this problem you will estimate f'(-3) by computing the average rate of change of f(x)over a small
1. 0 answers
2. asked by anonymous
3. 1,073 views
What role did religion play in prompting settlement to America, especially to New England?
1. 1 answer
2. asked by Yasmine
3. 1,069 views
An applied force varies with position according to eq. Fx = 3x3 - 5, where x is in m, and Fx in N. What is the work of this
1. 0 answers
2. asked by cls
3. 1,069 views
A laser emitting light of wavelength 580 nm is incident on a diffraction grating. What is the maximum number of lines per
1. 1 answer
2. asked by Alex
3. 1,067 views
is this correct...(3x^2+4x-3)^2-(3x^2-x+2)^2 then is it this (9x^4+24x^3-2x^2-24x+9)-(9x^4-6x^3+13x^2-4x+4) or this
1. 0 answers
2. asked by Kane
3. 1,054 views
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the
1. 1 answer
2. asked by Bala
3. 1,040 views
The height, in feet, of a free�]falling object t seconds after being dropped from an initial height s can be found using the
1. 3 answers
2. asked by Debbie
3. 1,031 views
What value will make the equation6(x+5)=3(x-14) true?
1. 4 answers
2. asked by evelyn
3. 1,029 views
A rock is tossed straight up with a velocity of 33.9 m/s. When it returns, it falls into a hole 11.9 m deep. What is the rock's
1. 0 answers
2. asked by Em
3. 1,026 views
An atwood machine consists of a massless string connecting two masses over a massless, frictionless pully. In this case, the
1. 1 answer
2. asked by Larry
3. 1,022 views
How do i show work for this math question. A puppet requires 3/4 yard of material. How many puppets can be made from 9 yards of
1. 3 answers
2. asked by jack
3. 1,021 views
Society operates more efficiently if government power is centralized. What reasons exist for continuing federalism in its
1. 1 answer
2. asked by Leanna
3. 1,000 views
What does it mean to be true American?Can someone suggest something because I need to write an essay.
1. 1 answer
2. asked by Mr.English
3. 998 views
What is the answer to the puzzle time 1.5 that starts with did you hear about?
1. 4 answers
2. asked by Rebecca
3. 996 views
a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at
1. 0 answers
2. asked by Jim
3. 994 views
In a symbiotic relationship between organisms of significantly different sizes, the largerorganism is called the ___________,
1. 1 answer
2. asked by Dawn
3. 993 views
A bicycle wheel that initially spins at 3 revolutions per second is braked uniformly to a stop in 1 second. A spot is painted at
1. 3 answers
2. asked by andrew
3. 989 views
Two rotating wheels have masses such that m2 = 5 m1, and radii such that R2 = 4 R1. If the angular accelerations of the wheels
1. 2 answers
2. asked by Anonymous
3. 986 views
Consider the earth following its nearly circular orbit about the sun. The earth has mass 5.98*10^24 and the sun has mass
1. 1 answer
2. asked by Eden
3. 978 views
Monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 1.81 m away. If the
1. 0 answers
2. asked by Alex
3. 978 views
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a
1. 0 answers
2. asked by Jack
3. 974 views
Work Energy Laba. What assumptions have been made in performing law of conversation of energy and analyzing the results? b.
1. 0 answers
2. asked by mas
3. 970 views
what are the three clauses of the fourteenth amendment that articulate how people are to be treated by the united states
1. 1 answer
2. asked by Natalie
3. 965 views
A sulfur-containing compound is decomposed and the products are collected over water according to this equation:SxOy -> SO2(g) +
1. 0 answers
2. asked by Alyssa
3. 961 views
A 26 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static
1. 0 answers
2. asked by Shae
3. 959 views
Larry leaves home at 3:02 and runs at a constant speed to the lamppost. He reaches the lamppost at 3:18, immediately turns, and
1. 0 answers
2. asked by Bala
3. 958 views
If the jet is moving at a speed of 1800 at the lowest point of the loop, determine the minimum radius of the circle so that the
1. 1 answer
2. asked by Eden
3. 956 views
if 7 times a certain number is subtracted from 6, the result is five times the number, find the number.
1. 3 answers
2. asked by mike
3. 954 views
Express the quantified statement in an equivalent way.Some students are bored. Would it be Not all students are bored?
1. 2 answers
2. asked by Pamela
3. 952 views
Candy stripers are teenage volunteers at hospitals.(In this sentence, what is the meaning of 'stripers'? Does it mean people who
1. 3 answers
2. asked by rfvv
3. 950 views
home work check pleased1. Eduardo es _____ Chile. A al; B en C a D de E del F all of the above b2. "Romeo and Juliet" es _____
1. 2 answers
2. asked by whitney
3. 932 views
Write a false conditional statement. Is it possible to insert the word "not" into your conditional to make it true? If so,write
1. 3 answers
2. asked by Shadow
3. 931 views
A 3.9 kg particle starts from rest and moves adistance of 2.4 m in 2.4 s under the action of a single, constant force. Find the
1. 2 answers
2. asked by Wendia
3. 928 views
what is the area of a hexagon with a 48 inch perimeter? i know its 166.277 but i need that in square root form?
1. 3 answers
2. asked by nick
3. 926 views

Back to October 2010

Ask a New Question

Archives
Contact Us
Newest
Privacy Policy
Terms of Use
© 2025