Sunday
February 14, 2016

# Posts by chloe

Total # Posts: 447

Chemistry
Na, Ca, Zn, Al, Mn
April 10, 2014

Pyhsics
8.3x10^3m
April 10, 2014

3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 ...
March 20, 2014

Science
1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...
March 17, 2014

1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...
March 17, 2014

So... is the 1st one is correct? A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. •3.8 ft^3 •60 ft^3 <<<<<< •15 ft^3 •10....
March 12, 2014

A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. •3.8 ft^3 •60 ft^3 <<<<<< •15 ft^3 •10.4 ft^3 A pyramid has a height of...
March 12, 2014

Science
1.b 2.c 3.c 4.d 5.d 6.a 7.b 8.c 9.d 10.c I just took this quiz so all these are correct
March 5, 2014

Math
The diameter of a circular pizza is 24 in. How much pizza is eaten (in square inches) if half of it is consumed?
March 3, 2014

Algebra 2 Help
1.) Solve for x. 2x(x - 12) = -40 2.) Solve for x. 3x2 + 2x = 12 - 7x 3.) Simplify the expression. 8sqrt[-63] 4.) Find the absolute value of the complex number. Abs Val [7 + 24i] 5.) Simplify the expression. [4 - 7i] + [2 + 3i] Thank you so much!! :)
February 28, 2014

Algebra 2
1.) Solve for x. 2x(x - 12) = -40 2.) Solve for x. 3x2 + 2x = 12 - 7x 3.) Simplify the expression. 8sqrt[-63] 4.) Find the absolute value of the complex number. Abs Val [7 + 24i] 5.) Simplify the expression. [4 - 7i] + [2 + 3i] Thank you so much!! :)
February 28, 2014

Math
4 pictures
February 28, 2014

? ? ? ? ? ? ? ? A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 ***** c.) 5 d.) 1 Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect the ...
February 18, 2014

A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 c.) 5 d.) 1 ***** Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect the x-axis? a.) 3...
February 18, 2014

OK, thanks guys!
February 14, 2014

1. During the election of 1824, which candidate won the popular vote and which candidate won the presidency? a.) Andrew Jackson; John Quincy Adams ***** b.) Andrew Jackson; Andrew Jackson c.) John Quincy Adams; John Quincy Adams d.) John Quincy Adams; Henry Clay 2. Some ...
February 14, 2014

7. "In 1831 Lowell was little more than a factory village. Several corporations were started, and the cotton-mills belonging to them were building. Help was in great demand; and stories were told all over the country of the new factory town, and the high wages that were ...
February 13, 2014

OH Ms. Sue I have 3 more can you also check them too?
February 13, 2014

Oh really, Wow! OK, then. Thanks Ms.Sue! for checking!
February 13, 2014

Are my answers are correct? Please check them! 1. Which of the following helped to increase the populations of northeastern cities? A) More diversity B) successful cotton crops C) growth of factories and trade***** D) building of the Erie Canal 2. A boundary was set between ...
February 13, 2014

Chemistry
Yep, I caught it. Thanks for your help!
February 11, 2014

Chemistry
It makes senses that the molar mass would be smaller than that of CH4 if it diffuses faster. 1/2 = square root of 22/88 = 22 g/mol ?
February 11, 2014

Chemistry
I used the formula given and came up with 352 g/mol, would that be correct?
February 11, 2014

Chemistry
A gas diffuses twice as fast as CF4 (g). The molecular mass of the gas is: I'm not sure how to figure this out without the rates of diffusion.
February 11, 2014

Math
if a 16 ounce can of soup costs 64 cents, what is the cost for each ounce of soup?
January 29, 2014

Earth Science
partial freezing
January 16, 2014

physics
A 5.0 kg \rm kg, 52-cm \rm cm-diameter cylinder rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a)What is the magnitude of the cylinder's initial ...
December 6, 2013

Alg 2
It did help. Thank you so much! cx
October 25, 2013

Alg 2
The value of y varies directly with x. If y = 64 when x is 16, what is x when y is 288?
October 25, 2013

English
In the following sentence identify the appositive or appositive phrase and the noun or pronoun defined by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive? Noun or pronoun defined?
October 1, 2013

Chemistry
How to calculate Q in Nernst Equations, we used 0.10M solutions in all of our half cells. Nernst equation: Ecell = E0cell - RT/nF ln Q Overall reactions: Cu(s) + Pb2+(aq) ~ Cu2+(aq) + Pb(s) and 3Pb(s) + 2Al3+ ~ 3Pb2+ 2Al(s) Thank you!
May 14, 2013

Chemistry
Using your experimental data, calculate E0cell. Standard voltaic cells contain 1M solutions, but we used 0.10M solutions in all of our half cells. Use the Nernst equation to calculate the standard cell potential (E0cell) from your measured Ecell and Qrxn. Data: Nernst Equation...
May 14, 2013

Math
An airplane is flying at an altitude of 6 miles and passes directly over a radar antenna. When the plane is 10 miles away, the radar detects that the distance is changing at a rate of 240 mph. what is the speed of the plane? This is an implicit differentiation problem
May 13, 2013

chemistry
No. this is the sample I did. Cu+(s)+/Cu2+aq)//Al3(aq)+/Al(s) is this right? Anode = Cu+(s)+/Cu2+(aq) - +0.337 Cathode = Al3+(aq)+/Al(s) - -1.66 Overall redox reactions: -0.337 - -1.66 = 1.323?
May 8, 2013

chemistry
A. Find and list all of the different half- cell combinations. Hint 15 combinations! 1. Copper/ Cu2+ 2. Lead/ Pb2+ 3. Magnesium/ Mg2+ 4. Zinc/ Zn2+ 5. Iron/Fe2+ 6. Aluminum/ Al3+ B. write the half reactions of each combination and the overall redox reaction. Please help! Thank...
May 8, 2013

Chemistry
What is the Ka of the amino acid serine if it is 34.5% dissociated at pH- 9.46?
May 4, 2013

Chemistry
ok thank you!
April 30, 2013

Chemistry
dG=? . how do I start this problem? Do I use dG= -RT*ln*K? dG=-(0.008314 kj/k*mol) (61+ 273.15) ln (29.24)?? I tried this and it is wrong.
April 30, 2013

Chemistry
DrBob222, I don't know how to solve this problem either. And yes, this is the question for this problem. I even double check it. Please help. Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of ...
April 30, 2013

Chemistry
Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of delta Gvap (in kJ) at 61'C for chloroform?
April 30, 2013

Chemistry
I realized where I made a mistake for this problem. This time, I got this one right. Thank you so much!
April 30, 2013

Chemistry
The following thermodynamic data was obtained for an unknown compound. Delta Hvap = 31.3 kj/mol and Delta S Vap= 79.7 kj/mol .Calculate the normal boiling point of this compound in Celcius.. Thank you! Chemistry - DrBob222, Tuesday, April 30, 2013 at 12:31am dG = dHvap - ...
April 30, 2013

Chemistry
At 20 degree celsius, Ka for an unknown monoprotic weak acid is 0.00088. Calculate the Delta G (in kJ/mol) for the reaction of this unknown acid with water. HA(aq) + H2O(l) <--> H3O+(aq) + A-(aq)
April 30, 2013

chemistry
Calculate the enthalpy of fusion of naphthalene (C10H8) given that its melting point is 128 Celsius and its entropy of fusion is 47.7 J (k*mol) .
April 29, 2013

chemistry
Given that for the vaporization of benzene Hvap= 30.7 kj/mol and Svap= 87.0 J(K * mol) , calculate Delta G (in kJ/mol) for the vaporization of benzene at 13 Celcius.
April 29, 2013

Chemistry
The following thermodynamic data was obtained for an unknown compound. Delta Hvap = 31.3 kj/mol and Delta S Vap= 79.7 kj/mol .Calculate the normal boiling point of this compound in Celcius.. Thank you!
April 29, 2013

Chemistry
Calculate the molar solubility of MgCO3 in a solution that already contains 1.7×10−3 M sodium carbonate. MgCO3 Ksp = 6.82 x 10-6 IMPORTANT NOTE: You must use the quadratic equation to solve this problem. (DrBob222- thank you so much for all your help!)
April 26, 2013

Chemistry
how did you get (that's 0.17M x 1/2 = 0.085M)
April 24, 2013

Chemistry
What is the ph at the equivalence point for a titration of 250 mL of 0.17M piperidine with 0.17 M nitric acid. (piperidine: Kb = 1.3 x 10-3)
April 23, 2013

Chemistry
Consider the titration of 41.2ml of 0.230 M HF with 0.220 M NaOH . Calculate the ph after the addition of 11.9ml of sodium hydroxide.(HF: Ka = 3.50 x 10-4) Please, I need step by step on on how to solve this type of problem. Thank you very much!
April 23, 2013

Chemistry
A 17.6ml sample of a monoprotic acid is titrated with 0.212M NaOH. If 69.2ml of base is required to reach the equivalence point, what is the concentration of the acid?
April 19, 2013

social studies
what wiped out most of the indigenous population of australia
April 8, 2013

Physics
Sammy Sosa
March 19, 2013

Math
There are 16 cubic boxes of erasers in a case. What are all the possible dimensions for a case of erasers ? please help need in 30 minutes or less so confused help please thanks
March 10, 2013

Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol
February 26, 2013

Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol
February 26, 2013

Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol
February 26, 2013

Chemistry
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol
February 26, 2013

CSU
what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol
February 26, 2013

thank you ms. sue.my mom said the same thing.
February 4, 2013

I have 12 with a remainder of 3. my teacher wants us to round and estimate. please help! do I round it to 7 divided by 70?
February 4, 2013

what is the estimated quotient of 6 divided into 75?
February 4, 2013

math
I don't know
January 28, 2013

math
katie is 4 years younger than sylvia. let k represent katie's age and let s represent slyvia's age.
January 22, 2013

algebra
It's m-3
January 9, 2013

MATHS
Is there any reason why f(g)=g^2+3 why do we replace the x with g? Sorry steve im trying my hardest to understand this
December 19, 2012

MATHS
Thank you steve It says i need to find f(g), i got a different result for some reason help please! And also in the second part, how did you get g^-1 = (x-1)/2 Thank you steve x
December 19, 2012

MATHS
Critical help please. Level 3 maths algebraic methods is really hard. Q) Two functions f and g are defined by f:x (arrow) x^2 + 3 g:x (arrow) 2x+1 Find a) the function fg b) solve the equation f(x)=12g^-1(x) I need to show my working out, please help someone
December 19, 2012

Algebra 1
Which one is it? A or D?
December 18, 2012

Maths
If tom got 200 euro for his birthday. He spent 1.0 how much did he spend?
December 6, 2012

English
What type of poem is this ? We found his flag one bitter morning And knew our hopes had come to woe. We had come pursuing glory But ended freezing in the snow. 1. The stanza of the poem offers an example of (1 point) slant rhyme. end rhyme. perfect rhyme. * internal rhyme. I ...
December 5, 2012

Math
Mrs. Yale wrote a number between 35 and 48 on her board. The sum of the digits is 7. What number did Mrs. Yale write on her board?
October 23, 2012

Chemistry
3.95x10^-22
October 16, 2012

health
is it A??
October 5, 2012

English
Yes, I know what similes and metaphors are. My question is where are their examples of similes and metaphors in the story?
September 18, 2012

English
In the story The Necklace written by Guy de Maupassant what are the examples of similes and metaphors?
September 18, 2012

grammar
Everyone knows that necessity is the mother of invention. The woman who invented disposable diapers was both a woman and an inventor. Marion Donovan invented the disposable diaper in 1950, she used a regular cloth diaper, lined it with pieces cut from a shower curtain, and ...
September 10, 2012

ashworth
i go to the same school for homeschooling and i need help with the same question
July 8, 2012

The state of Confusion enacted a statute requiring all trucks and towing trailers that use its highways to use a B-type truck hitch that is presently being manufactured by only one manufacturer, which is located in Confusion. The result of this statute is that any trucker who...
June 27, 2012

chemistry
a 3.00g sample of baking soda is heated and decomposes according to the reaction below. Calculate the theoretical yield in grams for each of the three products Na2Co3. H2O, CO2
June 17, 2012

chemistry
From the following Information, calculate the standard change of enthalpy for the combustion of coal. SHOW WORK AND BALANCED REACTION!!! Compound DeltaHf (kj/mol) Coal 0.0 Carbon dioxide -393.5 Water (l) -285.9 Oxygen 0.0
June 12, 2012

chemistry
From the following Information, calculate the standard change of enthalpy for the combustion of coal. SHOW WORK AND BALANCED REACTION!!! Compound DeltaHf (kj/mol) Coal 0.0 Carbon dioxide -393.5 Water (l) -285.9 Oxygen 0.0
June 12, 2012

chemistry
What is the molar solubility of Sr3(AsO4)2 and the concentration of Sr^+2 and AsO4^-3 in a saturated solution at 25C? the Ksp is 1.3 E -18. Show the balanced reaction.
June 10, 2012

Math
How would I prove: 2^n + 2^n = 2^(n+1) The question asks for correct formatting in giving proof however I don't recall learning this before. Any help would be appreciated!
May 28, 2012

Math
12. A particular power boat travelling at V0 km/h when its power is turned off it will have its speed V given by V(t) = V0 x 10^-0.18t where t is the time in seconds since the engine was turned off. If this boat was travelling at 50k/h before powering down, construct a table ...
May 28, 2012

math
THANK YOU MY GOD YOU SAVED MY LIFE
March 21, 2012

Chemistry
If 150.0 grams of iron at 95.0 degrees Celcius, is placed in an insulated container containing 500.0 grams of water at 25.0 degrees Celcius, and both are allowed to come to the same temperature, what will that temperature be? The specific heat of water is 4.18 J/g degrees ...
February 22, 2012

Geometry
i have the same question in my class too so thank you
February 14, 2012

Physics
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 18.5o below the horizontal. It strikes the ground 3.30 s later. How far horizontally from the base of the building does the ball strike the ground? What ...
February 7, 2012

physics
Describe in detail an experiment to find out the half life of a radioactive material
January 31, 2012

physics science
Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou
January 31, 2012

physics science
Sorry can someone please so me how to do this thanks
January 31, 2012

physics science
Sorry I don't understand this I have do decribe in detail the investigation could you please give me some pointers on how to start Thanks again
January 31, 2012

physics science
Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou
January 31, 2012

Math
When you do a free throw, you get 2 tries 42/60=.7=7/10=70% probability(make) 10/10-7/10=3/10=30% probability (miss) 0 points= 3/10=30% 1 point= 7/10•3/10=21/100=21% 2 points= 7/10•7/10=49/100=49% To make sure it's in the range of 100 as the whole number add 3/10...
December 14, 2011

Calc
We are working on finding the intervals of convergence of power series in class. Why do we not have to test for the convergence of the endpoints for geometric series? They always seem to diverge. Is this a set rule when working with the geometric series for this type of problem?
December 1, 2011

irish
thank you they were very helpful and thank's again
November 30, 2011

irish
im sorry for being cheeky i just find this hard
November 30, 2011

irish
its not an assignment and i was only asking if anyone understood this im sorry ok
November 30, 2011

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