colin
Most popular questions and responses by colin
Chemistry
The equilibrium constant for the reaction: 2NO(g)+Br2(g)2NOBr(g) Kc=1.3x10^2 at 1000 Kelvin Calculate Kc for: NOBr(g)NO(g)+ 1/2Br2(g)
asked on February 26, 2012 
AP CHEM HELP
When NH3 is added to solid Hg2Cl2, some of the mercury ions are oxidized and some are reduced. A reaction where the same substance is both oxidized and reduced is called a disproportionation reaction. Write equations for each of these halfreactions. HELP
asked on April 9, 2013 
AP Chemistry
The Synthesis of an Iron Oxalato Complex Salt (“Green Crystals”) In this experiment you will synthesize a compound that will contain the elements potassium, iron, carbon, hydrogen, and oxygen. Carbon and oxygen will be present in the compound as
asked on October 17, 2012 
chemistry
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?
asked on October 13, 2011 
maths
Marie can afford a $250 per month car payment. She’s found a 5 year loan at 7% interest. a. How expensive of a car can she afford? b. How much total money will she pay the loan company? c. How much of that money is interest?
asked on July 18, 2012 
Chemistry
If you mix 50.0 mL of a 0.500 M solution of calcium nitrate with 150. mL of a 0.250 M solution of potassium nitrate, what would be the resulting molarity of nitrate ions in the final mixed solution ?
asked on January 24, 2016 
chemistry
calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L
asked on February 26, 2012 
math
The height, h(t), of a projectile, in metres, can be modelled by the equation h(t) = 14t – 5t2, where t is the time in seconds after the projectile is released. Can the projectile ever reach a height of 9m? Explain.
asked on October 14, 2012 
Maths
I divide exactly by 100 my first two digits are equal the sum of my four digits is 8
asked on February 25, 2013 
Physics
a driver sees a horse on the road and applies the brakes so hard that they lock and the car skids to a stop in 24 m. the road is level and the coefficient of kinetic friction between the tires and the road is 0.7. How fast was the car going when the brakes
asked on October 23, 2012 
Physics II
Jose, whose mass is 75 kg, has just completed his first bungee jump and is now bouncing up and down at the end of the cord. His oscillations have an initial amplitude of 11.0 m and a period of 4.0 s. From what height above the lowest point did Jose jump?
asked on March 1, 2011 
maths
How much would you need to deposit in an account now in order to have $20,000 in the account in 4 years? Assume the account earns 5% interest.
asked on July 18, 2012 
math
write this number in word form 310,763,136 write this number in expanded form 20,484,163
asked on September 1, 2015 
Chemistry
assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at 14.5 C? The freezing point for pure water is 0.0 C and is equal to 1.86 C/m .
asked on January 27, 2012 
chemistry
A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) >K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in
asked on October 14, 2011 
physics
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to 2.6 times her weight as she goes through the dip. If r = 20.0 m, how fast
asked on November 23, 2010 
maths
You deposit $1000 each year into an account earning 8% compounded annually. a. How much will you have in the account in 10 years? b. How much total money will you put into the account? c. How much total interest will you earn?
asked on July 18, 2012 
Chemistry
Calculate the [OH] for a solution in which [H+] is 1000 times greater than [OH]? and will the final result be acidic, basic, or neutral?
asked on February 25, 2012 
chemistry
In the following experiment, a coffeecup calorimeter containing 100 mL of H20 is used. The initial temperature of the calorimeter is 23.0 C . If 3.60 g of CaCl2is added to the calorimeter, what will be the final temperature of the solution in the
asked on October 20, 2011 
Chemistry 101
A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) >K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in
asked on October 14, 2011 
physics
a 5kg crate is resting on a horizontal plank. the coefficient of static friction is .5 and the coefficient of kinetic friction is .4. after one end of the plank is raised so the plank makes an angle of 25 degrees with the horizontal, the force of friction
asked on October 26, 2010 
science
What is the ratio of sulfur atoms to oxygen atoms in SO2?
asked on November 17, 2007 
history
which economic activities are most dependent on georgia's climate? a lumber and mining b imports and exports c agriculture and tourism d transportation and telecommunications
asked on March 15, 2019 
Chemistry
2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1. 1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2. How will the new
asked on April 17, 2013 
AP Chem
(MnO40 + (C2O4)2 + H+ = CO2 + H2O + ? OR (MnO4) + (C2O4)2+ OH=CO2 n+ H2O +? Can somebody please help me predict the products? I can balance it i just need help determining what to balance.
asked on October 23, 2012 
maths
How much money will I need to have at retirement so I can withdraw $60,000 a year for 20 years from an account earning 8% compounded annually? a. How much do you need in your account at the beginning b. How much total money will you pull out of the
asked on July 18, 2012 
Chemistry
Determine the volume (in mL) of 0.844 M hydrochloric acid (HCl) that must be added to 38.0 mL of 0.650 M sodium hydrogen phosphate (Na2HPO4) to yield a pH of 6.92. Assume the 5% approximation is valid and report your answer to 3 significant figures. Look
asked on March 9, 2011 
Gr.7  math
4. The dimensions of a kingsize waterbed are 2.1m, 1.8m, and 23 cm. Find the volume and mass of the water it contains when full.
asked on January 5, 2010 
science
You have a pulley 13.9 cm in diameter and with a mass of 1.7 kg. You get to wondering whether the pulley is uniform. That is, is the mass evenly distributed, or is it concentrated toward the center or the rim? To find out, you hang the pulley on a hook,
asked on October 22, 2013 
math
if 400 customers come to a grand opening and every 5th customers receives a coupon for jeans and every 7th customers receives a coupon for a free sweater. how many customers will leave with both
asked on November 1, 2012 
science
how many atoms of S are there in 3 (NH4)2 SO4
asked on October 27, 2015 
magnetism
A charged particle with charge q is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for
asked on December 18, 2013 
Math
The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.
asked on February 10, 2010 
10th grade
Whatis the difference between the Hudson Bay Lowlands and the Arctic Lowlands?
asked on November 12, 2008 
Algebra
Okay i have a few function questions im gonna post. Im completely confused with these so any help would be great. Minimum or maximum value of: f(x)=2x^2+4x+1 and f(x)=x^23x+2 then if f(x)=x^2+9 and g(x)=x4, find (g*f)(3) next is if f(x)=x^3+x^2x1 and
asked on December 12, 2007 
Physics
You would like to shoot an orange in a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. On your first try, you fire the arrow at 32.0 m/s at an angle of 30.0° above the horizontal from a height of 1.10 m while standing 52.0 m
asked on September 30, 2015 
chemistry
the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL
asked on October 18, 2011 
Chemistry
Determine the molarity (in mol/L) of NO2− ions in solution when 9.77×101 g of sodium nitrite is added to enough water to prepare 3.94×102 mL of the solution.
asked on March 2, 2011 
Chemistry
A mixture containing CH3OH, HF, CH3F, and H2O, all at an initial partial pressure of 1.04 atm, is allowed to achieve equilibrium according to the equation below. At equilibrium, the partial pressure of H2O is observed to have increased by 0.43 atm.
asked on March 9, 2011 
chemistry
The mole fraction of an aqueous solution of sodium dichromate is 0.367. Calculate the molarity (in mol/L) of the sodium dichromate solution, if the density of the solution is 1.42 g mL1.
asked on February 25, 2011 
Chemistry
chemistry question. How many grams of silver sulfide can be produced by heating 45 grams of silver excess sulfer?
asked on January 9, 2011 
Math
The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.
asked on February 10, 2010 
math
Find the slope of the line passing through the points A(4, 3) and B(4, 2)
asked on August 30, 2011 
Physics
a 10kg table needs to be pushed across the floor (µ=3). u stand behind it and push it at an anjgle of 30 degrees down with a force of 60N. wats the acceleration of the table?
asked on April 7, 2008 
Algebra (word problems)
1) a small pipe can fill a tank in 16 min more time than it takes a large pipe to fill the same tank. Working together, both pipes can fill the tank in 6 min. How long would it take each pipe working alone to fill the tank? 2) a car travels 240 mi. a
asked on December 12, 2007 
Algebra
a cessna can fly at a rate of 220 mph in calm air. traveling with the wind, the cessna flew 780 mi in the same amount of time as it flew 540 mi against the wind. find the rate of the wind. how do i set this problem up? please explain in detail cuz i don't
asked on October 15, 2007 
math
write the number in two other forms 6,007,200 and 32,005,008
asked on September 1, 2015 
math
sam makes $400 per week plus $20 commission on each new cell phone plan she sells. Write an equation to determine how many plans she sold to earn $680 last week.
asked on October 20, 2014 
Magnetism
A circular wire loop of mass M and radius R carries a current I. It hangs from a hinge that allows it to swing in the direction perpendicular to the plane of the loop. A uniform magnetic field B exists everywhere in space pointing upwards. What angle θ
asked on December 18, 2013 
magnetis
A metal spring can be used as a solenoid. The spring is stretched slightly, and a current is passed through it. The resulting magnetic field will cause the spring to a. collapse (shorten) b. stretch (lengthen) c. not change (nothing happens) d. ranslate
asked on December 18, 2013 
Physics
Vector A has a magnitude of 5.00 units, vector has a magnitude of 5.00 units, and the dot product A·B has a value of 16. What is the angle between the directions of A and ?
asked on January 20, 2013 
Math
A toy train has 20 cars blue, purple and orange. There are 4 times as many blue cars as purple cars. There are 5 times as many orange cars as purple cars. How many of each color are there?
asked on September 12, 2012 
math
whats 17.50x30
asked on November 21, 2011 
CHEMISTRY URGENT!!!
Determine the pH (to two decimal places) of the solution that is produced by mixing 30.3 mL of 1.00×104 M HBr with 829 mL of 5.77×104 M Ca(OH)2.
asked on March 23, 2011 
7th grade
5. What is the mass of the water? a. that fills a 1m^3 tank b. that fills a 2L bottle c. that would fill you empty classroom Thanks for your help!
asked on January 5, 2010 
Geography
What is happening to the distance between Canada and Europe? Which plates meet near the west coast of Canada? In whihc direction are they moving?
asked on November 13, 2008 
algebra
simplify (numbers AFTER the variable represent exponents) ALSO these are all fractions, theres just no way to put the line x264 . x2x6 _ 1 x24x12 x2+5x24 x6
asked on October 15, 2007 
Physics
I know how to get the speed if it accelerated the whole time. How do I calculate the cruising speed? Starting from rest, a car travels 1,350 meters in 1 min. It accelerated at 1 m/s^2 until it reached its cruising speed. Then it drove the remaining
asked on September 7, 2007 
Math
Airport control tower measures the distance to one plane taken off at 500m and distance to second plane coming for a landing at 1050m. If the angle between the lines of observation on radar screen is 86 degrees> how far apart are the two planes?
asked on January 16, 2017 
math
write the number in two other forms 6,007,200 and 32,005,008
asked on September 1, 2015 
physics
At t = 0, an automobile traveling north begins to make a turn. It follows onequarter of the arc of a circle of radius 10.1 m until, at t = 1.64 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find
asked on January 28, 2014 
chemistry
The mole fraction of an aqueous solution of magnesium chlorate is 0.371. Calculate the molarity (in mol/L) of the magnesium chlorate solution, if the density of the solution is 1.39 g mL1.
asked on February 28, 2012 
5th grade
how do you break apart to divide: 648 by 6 using compatible numbers to break apart the dividend.
asked on August 31, 2010 
science
what is a ernmeyer flask and a granulated cylander used for?
asked on September 27, 2009 
math
what is the gcf of 24,32
asked on November 5, 2008 
Algebra
an amtrak trainand a car leave new york city at 2 PM and head for a town 300 miles away. the rate of the amtrak train is 1 1/2 times the rate of the car. the train arrives 2h ahead of the car, find the rate of the car
asked on October 15, 2007 
physical science
two cars 200meters apart drive towards one another. If one car travels at 12 meters/s and the other at 26 meters/s how long does it take for them to collide?
asked on April 7, 2013 
Maths
How do yo calculate a number to the power of 2.08 i.e. not a whole number. so 4 to the power of 2.08 Thanks.
asked on May 11, 2012 
math
we have a problem that my parents cant help with. 846*2=(...+40+...)*2=(800 over ...+...over2+6 over...)=(400+...+3)...=... ...means blank space for a number. Can you help with this problem, so that I can figure out the rest of the problems.Thanks
asked on August 31, 2010 
Music
I need a new written add on verse of bob dylan chimes of freedom song has to be 8 lines long and the last line is An' we gazed upon the chimes of freedom flashing.
asked on May 29, 2010 
algebra
Need help showing me the steps without using the carrot function: Find the product. (2y + 2z)(2y  3z)
asked on February 23, 2010 
Reading
What is the definition of the word embers?
asked on October 21, 2009 
Friedman test: Can !?
I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very
asked on August 13, 2009 
English
I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very
asked on August 13, 2009 
Geography
What is happening to the distance between Canada and europe
asked on November 15, 2008 
Geography
Name the five largest plates and on which plate Canada is located?
asked on November 13, 2008 
science
potential energy is energy of _______ or chemistry?
asked on November 6, 2008

worl geography
It is d because a is federations that's not a type of government, b doesn't make sense and c is not in these countrys
posted on March 5, 2018 
Math
A. You basically add two numbers together to get 60. So it's basically __ + __ = 60, and you can put in any two numbers that equal 60 when added. B. It's almost the same as what I said for the first problem, except it's __ x __ = 60, so you find two
posted on October 17, 2017 
math
1. If each person gets 1 serving, then you would need to get 4 cakes, and have 23 servings left over. If you get 3 cakes, one person won't get any servings of cake, so you need 4 cakes. 2. For this one, you need the time it takes her to complete her
posted on October 9, 2017 
American Government
lol dad
posted on March 9, 2017 
Physical Science
88.89 km/hr
posted on February 10, 2017 
Algebra with pizzazz
it has diabetes
posted on September 9, 2016 
nuclear chemistry
I know this is too late for you Nancy and you Andrew, but I thought it might be useful for other students out there. So, to solve this problem we: First convert 1.0 MW to W then to J/s 1.0 MW x 10^6 W/MW x ((1.00 J/S)/W) = 1.0 x 10^6 J/s Next we use the
posted on August 26, 2016 
chemistry
agreed
posted on February 2, 2016 
math
1/3
posted on January 7, 2016 
5th grade religion
poooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopppppppppppppppppppppoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
posted on September 15, 2015 
math
write this number in two forms 6,007,200 and 32,005,008
posted on September 1, 2015 
physics
2465
posted on January 20, 2015 
Physics
A boat beguins on the best side of a river and heads straight east across the river with a speed of 1.9 Ft/s (relative to the water). the river water flows NORTH at the speed of 2.^ Ft/s (relative to the shore). The resultant veliocty of the boat (
posted on November 19, 2014 
geometry
Eg if EF=13cm
posted on September 4, 2014 
Chemistry
2.00x10^3
posted on March 18, 2014 
PHYSICS
work out the velocity from right hand rule. Remember what current means in terms of conventional current.
posted on December 17, 2013 
electricity and magnets
Think about conventional current.
posted on December 17, 2013 
magneismt
what statements?
posted on December 17, 2013 
Physics
not yet
posted on December 16, 2013 
Physics
So did this work out Lora?
posted on December 16, 2013 
PHYSICS
That seems really small.
posted on December 16, 2013 
PHYSICS
whats h? is that the height 10 cm?
posted on December 16, 2013 
PHYSICS
There are two things in life, physics and everything else is stamp collecting.
posted on December 5, 2013