Wednesday
August 5, 2015

Posts by Brittany


Total # Posts: 877

Chemistry
a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?
December 9, 2010

Chemistry
A 2.4375 g sample containing a mixture of KClO3 and NaCl is heated and under goes a mass loss of 0.6191 g. What is the percent of KClO3?
December 9, 2010

Chemistry
I ended up getting 42.718333 not rounded to sig figs but does the excess of hydrochloric acid have anything to do with the answer and what about the STP?
December 8, 2010

Chemistry
If you have Hydrochloric acid, how many grams of aluminum must you use to produce 57.0 L of hydrogen at STP? 2Al(s)+6HCl(aq) --> 3H2(g)+2AlCl3(aq)
December 8, 2010

Chemistry
The specific heat capacity of Lead is 0.127J/degrees C*g. What is the molar heat capacity of Lead? What is the heat capacity of a lead cylinder that has a mass of 235000g?
December 8, 2010

chemistry
specific heat of water there isnt one?
December 8, 2010

chemistry
How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792 grams of water.
December 8, 2010

Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
December 8, 2010

alg 2
to find 'x' you add 243 to both sides so: 3x^2=243 divide both sides by 3 3x^2/3 = 243/3 x^2 = 81 then take the square root of both sides so x=9 hope that helps, be sure to plug your numbers back in to check it take 9 and plug it in for x :: 3(9)^2-243 3(81)-243 243-...
December 8, 2010

Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
December 8, 2010

Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
December 8, 2010

college Chemistry
B. because it jumps straight from 1s2 to 2p1 it has to go :: 1s2 2s2 then 2p1
December 6, 2010

advice
could you mark each verb used in bold. identify the specific tense used in parentheses. I have seen many examples of different saving plans. I planned on using these strategies in my personal life.
December 5, 2010

physics
but what if it asks how long it will take to fall?
December 4, 2010

physics
OH!! so thats where i went wrong. thanks again! ^w^
December 4, 2010

physics
so its 2*9.81*155?
December 4, 2010

physics
The single cable supporting an unoccupied elevator breaks when the elevator is at rest at the top of a 155 m high building. With what speed does the elevator hit the ground?
December 4, 2010

physics
At the instant a traffic light turns green, a car starts moving with a constant acceleration a of 4.00 m/s2. At the same instant a truck, traveling with a constant speed of 10.09 m/s, overtakes and passes the car. How far beyond the traffic light will the car overtake the truck?
December 4, 2010

physics
thank u so much!! ^w^
December 4, 2010

physics
so how would i go about finding acceleration?
December 4, 2010

physics
The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 21 knots head wind? The runway at the Tallahassee Regional Airport has a length of 8000 ft.
December 4, 2010

Biology
I need help making a concept map. I have to put the following words into one and i dont know where to start. Gene DNA Chromosome Mutations Protiens Central Dogma Signal Transduction Nucleus mRNA tRNA rRNA Ribosomes Autosomes Sex Chromosomes Recessive Translation Transcription ...
December 3, 2010

W.H.Atwell
Does 2Na 2H2O 2NaOH H2 shows that the total mass during a chemical reaction stays the same?
December 1, 2010

12th grade English
ok thank u anyway
November 30, 2010

12th grade English
o an thanks
November 30, 2010

12th grade English
srry its catcher in the rye
November 30, 2010

12th grade English
I need help i have to have a literary term for ch. 1,2,3,5,12,13,14,16,and 26 im having trouble figuring out how to do that so can somone help me please
November 30, 2010

Chemistry
Calculate the percent of carbon, hydrogen, nitrogen, and oxygen in this widely used pesticide, Sevin. The molecular formula is C12 H11 O2 N.
November 23, 2010

Chemistry
Calculate the percent of carbon, hydrogen, nitrogen, and oxygen in this widely used pesticide, Sevin. The molecular formula is C12 H11 O2 N.
November 23, 2010

chemistry
combustion of 0.356g of an unknown metal sample in oxygen gives 0.452g of an oxide in the form of mO2, Identify the unknown metal?
November 23, 2010

Chemistry
A gas has a volume of 4.00 at 0. What final temperature in degrees Celsius is needed to cause the volume of the gas to change to the following, if (number of moles of gas) and are not changed? 290 L
November 23, 2010

chemistry
how do you figure that out?
November 23, 2010

chemistry
What mass of Zn can be dissolved by 558 mL of 3.01M HCl?
November 23, 2010

ela
if you unscramblethe letters SATLEIVER what word do u get and it has to do with thanksgiving
November 22, 2010

algebra
The following problem has a total of six solutions each. (X^2-5x+5)^x^2-9x+2=1. Its extra credit
November 19, 2010

Physics
Find the heat necessary to change 2.5kg of water (ice) at -2 degrees C to steam at 105 degrees C. specific heat ice= 2060 specific heat water= 4180 specific heat steam= 2020 heat of fusion= 3.34X10^5 heat of vaporization= 2.26X10^6
November 18, 2010

Physics
How much heat must be added to 3kg of liquid water at 25 degrees C to change it into steam at 120 degrees C?
November 18, 2010

physics
a banana with a temperature of 17 degrees C (specific heat of banana= 3520j/kgK) and a a mass of 250g is placed in a bowl of milk with a temperature of 8 degrees C and a mass of 350g (specific heat of milk= 4200 J/kgK). no heat is lost to the bowl or the air as the banana and ...
November 18, 2010

Physics
lead melts at 328 degrees C. lead has a heat of fusion of 2.04X10^4 J/kg and a specific heat of 130 J/kgK. how much heat must be removed from 0.50 kg of molten lead (liquid) at 328 degrees C to make it all a solid chunk at 300 degrees C?
November 18, 2010

5th grade science
blank a type of material that tries to prenent the flow of thermal energy.
November 15, 2010

Social Studies
to.................much.....................................for..............................................................brain........................................................................................................AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH...
November 10, 2010

math-- please help
A minor league baseball pitcher is hired for $700 per month plus $100 per game won. Write an equation to express his monthly earnings (e) in terms of games won (x).
November 5, 2010

math --slope and y intercept
A funiture refinishing outlet pays its employlees $40 per day plus $10 per unit refinished. Write an equation to express an employees daily wage(w) in terms of units finished(x)
November 5, 2010

Chemistry
A solution contains an unknown mass of dissolved silver ions. When potassium chloride is added to the solution, a white precipitate forms. The precipitate is filtered and dried and then found to have a mass of 245 mg. What mass of silver was in the original solution? (Assume ...
November 4, 2010

STATISTICS PLEASE HELP!!!!!
are you a chocolate "purist", or do you like other ingredients in your chocolate? american demographics reports that almost 75% of consumers like traditional ingredients such as nuts or caramel in their chocolate. they are less enthusiastic about the taste of mint or...
November 3, 2010

linear equations -math
Find the equation of a line through the points (-2,3)and (-4,5)
November 3, 2010

math
Find the equation of a line through the points (-2,3)and (-4,5)
November 2, 2010

math
FInd the equation of a line through the point (-2,5) with a slope of -2
November 2, 2010

9th grade
WHAT IS THE SQUARE ROOT OF 192?
November 1, 2010

lee senior
what is -2x+y=-4
November 1, 2010

Maths
60 degree angle
October 31, 2010

math
people are attending a sold out concert there. thirty minutes before it starts 15,000 people are there.how many people have not arrived yrt?
October 28, 2010

Math
1
October 28, 2010

WESTERN CIV!
can you give me a summary of the Iliad by Homer?
October 20, 2010

Chemistry
A 26.7 g sample of ethylene glycol, a car radiator coolant, loses 668 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)?
October 20, 2010

Chemistry
One piece of copper jewelry at 101°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter (c of copper = 0.387 J/gK)?
October 19, 2010

Chemistry
A 26.7 g sample of ethylene glycol, a car radiator coolant, loses 668 J of heat. What was the initial temperature of ethylene glycol if the final temperature is 32.5°C (c of ethylene glycol = 2.42 J/gK)?
October 19, 2010

Trig
A force of 323 newtons makes an angle of 54 degrees and 20 minutes with a second force. The resultant of the two forces makes an angle of 39 degrees forty minutes with the first force. Find the magnitude of the second force. I have the answer, 814.3022, but I need to know how ...
October 19, 2010

HELP! INTRO TO ECO
Why do supply curves slope upward from left to right? Why don't we sometimes draw them sloping downward from left to right? Under what conditions would it be sensible to draw a supply curve that is horizontal(perfectly elastic)? Under what conditions would it be sensible ...
October 12, 2010

Intro to Eco Help
supply curves slop upward to the right because.. higher prices attract resources from other uses?
October 11, 2010

ECONOMICS HELP
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the ...
October 11, 2010

ECONOMICS HELP
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the ...
October 11, 2010

intro to economics
a draft system, whether professional sports or the military, enable those who are hiring to A.avoid paying a living wage B.produce what they produce at a lower cost C.educe the cost of labor D.transfer part of the cost of labor to someone other than themselves isnt B the ...
October 11, 2010

Intro to ECONOMICS
the basic reason suburban stores are more likely than downtown stores to provide free parking for their customers is that.. the cost of using land is higher in the downtown area?
October 11, 2010

economics
i dont think it would
October 11, 2010

economics
oh okay that makes it a lot clearer to me and that means it would decrease the demand for corn
October 11, 2010

economics
so its a, it has no effect?
October 11, 2010

INTRO TO ECO
Opportunity-cost theory suggests that the cost to an airline of letting its employees fly at no charge... A.is greater around the Christmas holidays B.will depend upon the value employees place upon travel C.zero D.depends upon alternatives avaliable to the employees is it c?
October 11, 2010

Intro to Economics
c?
October 11, 2010

Intro to Economics
Past expenses are irrelevant to decisions to supply now, because A.people forget the past quickly B.it is esssential to avoid bankruptcy C.supply decisions depend on opportunities thst will have to be forgone, not opportunities already forgone D.expenses incurred in the past ...
October 11, 2010

college
it must claim something specfic so i chose the leaves, i wanna talk about how they change colors or what the change of colors mean
October 11, 2010

college
what is a good thesis about autumn leaves, so i can write my parpagraph
October 11, 2010

PHYSICS
90 degrees of a circle is 1/4 the Circumference. Therefore it takes 0.49s to travel 1/4 of the way. Multiply .49 by 4 to receive the total amount of time it takes to make one revolution. To find velocity, find the circumference (2*r*pi). Divide the circumference by the time to...
October 5, 2010

11th grade
How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!
October 1, 2010

Language Arts
four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous"
October 1, 2010

physics 2
In this case, because you are beyond the surface of the sphere you should be able to treat it like a point charge.
September 23, 2010

world history
whatt will cause a population to grow?
September 22, 2010

Real Estate Management
3. A 50 unit apartment building has 20 – 1bedroom units; 20 – 2 bedroom units; and 10 - 3 bedroom units. The market price for the units is $600, $700, and $850 respectively. There is currently one of each unit vacant. Late fees are $15 and concessions include one ...
September 22, 2010

english
indentifying predicate nominatives and predicate adjectives in this sentence.. Do the strawberries on this vine look ripe to you?
September 21, 2010

organic chemistry
A solution of acetic acid (CH3COOH; Ka = 1.74 x 10-5) was titrated to a final pH of 4.76 by using NaOH solution. What % of acetic acid is converted to sodium acetate (CH3COO-Na+)? Show your method
September 12, 2010

Math
log(logx)=2
September 12, 2010

Math
e^2x+2e^x-15=0
September 12, 2010

Math
log(5x+1)=2+log(2x-3)
September 12, 2010

physics
10 n
September 11, 2010

physics
A ball of mass 200 grams is whirled in a circle at the end of a strong 100 cm long rope whose breaking strength is 10 N. Neglecting gravity, the maximum speed of the ball is approximately.
September 11, 2010

algebra
just plug in what x equals into the top equation and solve for what y equals then you can plug that answer in for y to get x
September 6, 2010

English Literature
its just worth ten points thank you=)
September 6, 2010

English Literature
Question: Explain why Beowulf is an epic poem and why Beowulf is an epic hero This is what i have: Beowulf is a national epic or a long narrative poem. It involves a hero, Beowulf, who is larger than life. The poem concerns eternal serious human problems. Beowulf represents ...
September 6, 2010

English Literature
This is the question:Disucuss three examples of the anglo-saxon belief in fate as shown in Beowulf. This is what i have The anglo saxons believe that fate is the grim view of life. You have no comtrol over life or destiny. Fate is the source that determines the result of ...
September 6, 2010

English lit.
Discuss history of the english language referring to major language families, branches,periods,changes, etc
September 6, 2010

English lit
how does achilles enemy differ from beowulfs and gilgameshs
September 6, 2010

English Literature
Explain why beowulf is an epic poem and why beowulf is an epic hero.
September 6, 2010

English Literature
Dicuss three examples of the Anglo-Saxon belief in fate as shown in beowulf.
September 6, 2010

physics
A student drops a ball from the top of a tall building; the ball takes 2.4 to reach the ground. What was the ball’s speed just before hitting the ground? (this is excluding everything like air resistance, etc)
September 3, 2010

Finance
Hello, I am doing a finance case, Twilight Acre Farms, and I am trying to determine cash flows. I was not given a revenue figure, only that productivity will increase 15% with the new machine. I do not know what to do. It says in the case that excess capacity is worth $35/hour...
September 1, 2010

geometry
find uw if vw is 5/8 inches
August 25, 2010

government
write several paragraphs stating advantages and disadvantages to the unitary, confederate, and federal systems of government.
August 19, 2010

Physics
We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non-visible light infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface...
August 11, 2010

Physics
Calculate the power output of a 1.5 fly as it walks straight up a windowpane at 2.2 2 sig figs P= ___W
July 14, 2010

Physics
ok so this is how i just set up up: .0015(kg) * 9.81 *.0015(m/s)=.0003234 THANKS!
July 14, 2010

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