Posts by katie

Total # Posts: 2,140

chemistry
3 moles C6H12O6 in 100 ml equals what molarity?

Math - ratio
5:3

Math
what is the answer to this problem?

Math
Thank you for the answer

Chemistry
oh i get it, it came from the initial... thank you !

Chemistry
why is it 2-2x? isn't it only just -2x?

Chemistry
Consider the following equilibrium: 2HI(g) *are in equilibrium with* H2(g) = I2(g) Keq = 81.0 A 2.00L container is initially filled with 4.00 mol HI. Calculate the [HI] at equilibrium. *I don't know how to put the equilibrium sign on the computer* Can someone please ...

Chemistry
I'm having trouble understanding Boyle's Law and Dalton's law of partial pressures. Can anyone help me work this please? Thank you A sample of propane gas, C3H8, was collected over water at 22.5 ºC and 680. torr. The volume of the wet gas is 3.89 L. What will ...

stats
367.75

Language Arts
Answer is b with anger

English: Faulty Coordination
Thank you Ms. Sue! But does my correction of #1 work? Is it correct?

English: Faulty Coordination
Rewrite the over coordinated sentences that follow, changing clauses into phrases or into single words. where appropriate, break the over coordinated sentence into two sentences. 1. The doctor inserted one end of a long tube into my throat, and she attached the other end of ...

Physics
A figure skater is spinning at a rate of 1.1 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 66% of its original value. What is her new rate of rotation?

idk
think about what both human and a machine can do.

math
The correct is c 22 trust me will pass it.

physics
A line directed to the west. A plane flies 20 degrees north of that direction ( 90 degrees north of that direction would be north..) if the plane flies for 340 km, determine its displacement toward the west and its displacement toward the north during its flight?

math
The Murphy family just drove 300 miles to visit their grandparents. Mr. Murphy drove 70 mph for 65% of the trip and 35 mph or less for 20% of the trip that was left. Assuming that Mr. Murphy never went over 70 mph, how many miles did he travel at a speed between 35 and 70 mph...

HEALTH AND P.E ONE QUESTION HELP!!!!!!!!!!
1. C 2. True 3. True Trust me I got a 100% correct 3/3

Chemistry
thank you very much!

Chemistry
oh I mean, is 3 a heterogeneous reaction, not 3a. But a gas and an aqueous is a heterogeneous reaction correct? Thanks!

Chemistry
Increasing the surface area will increase the reaction rate in: 1. N2(g) + O2(g) -> 2NO(g) 2. 2Mg(s) + O2(g) -> 2MgO(s) 3. CaCO3(s) + 2H+(aq) -> Ca2+(aq) + H2O(l) + CO2(g) MY WORK: I think it is 2 & possibly 3. 1 is a homogeneous reaction but is 3 a heterogeneous ...

geometry
636

Physics
A car accelerates from rest at 5 m/s2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5 m/s2 to come to rest. The entire journey takes 25 seconds. On a separate sheet of paper, plot the velocity-time graph of the motion. Describe the ...

Physics
You want to use a rope to pull a 12-kg box of books up a plane inclined 30∘ above the horizontal. The coefficient of kinetic friction is 0.29. The rope pulls parallel to the incline. What force do you need to exert on the rope if you want to pull the box with a constant ...

PLEASE CHECK! ELA
The answer is C, Compound Subject

history
C. reassure white American settlers that the frontier was safe and peaceful ?

history
what is the answer

Please help me with this Q
A. 4.8

Statistics
It is actually C - 30th

college physics
tennis ball rolls off the edge of a tabletop 0.900m above the floor and strikes the floor at a point 1.60m horizontally from the edge of the table. A: Find the time of flight of the ball B: Find the magnitude of the initial velocity of the ball. C: Find the magnitude of the ...

Math
How many tenths are there in 4/5

Algebra 1
the temperature at noon in los angeles on a summer day was 88 degrees fahrenheit. during the day, the temperature varies from this by as much as 7.5 degrees fahrenheit. write and solve an absolute-value inequality to find the range of possible temperature for that day.

English
I have recently been checking a few answers on this site and I have noticed Ms. Sue isn't really helpful, although she comments a lot. What would actually help is if she explained why the answer was wrong or at least said something other than "yes" and "no&...

Civics
Wow.Nobody answered the questions. That's pretty sad.

geometry
ABCD is a rhombus with diagonals Imported Asset and Imported Asset . Is angle ABD congruent to angle CBD?

ashford
Ruby emailed her instructor a question and he replied to her immediately.

math
That helped. Thankyou Ms.Sue

math
a 15 foot ladder is leaning against a house with the base of the ladder 4 feet from the house. How high up the house does the ladder reach? round to the nearest tenth foot.

Math
12

math
What is the period, in seconds, of a simple pendulum of length 3 meters? Use the gravitational constant g = 9.8 m/s2 and round your answer to two decimal places Please help! A step by step would with the answer would be helpful!

Pre-Calc
2. The polar coordinates of a point are given. Find the rectangular coordinates of each point. a. (5,(π / 4)) b. (-2,(π / 6)) NOTE: I tried to do these myself and got that: a= (4.99,0.27) b=(-1.99,-0.11) Which I know these are wrong, so I don't know how to do ...

Chemistry
A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 24.71 mL to reach a phenolphthalein end point. What is the molarity of...

Science
Here are my an answers 1.b 2.A and d 3. B d e 4. D 5. C d e 6. A and b 7.c 8.b. 9.b 10. D 100% correct

science
A rock tumbles straight down from a cliff, its moving at 20 m/s when it hits. What is the height of the cliff? The mass of the rock is 8 kg. a) 2.5 m b) 400 m C) 20.4 m d) 160 m

physics
A subcompact car, mass 1,000 kg, runs into and sticks to an at rest, 2,200 kg SUV. If their final speed is 4.7m/s ,what was the smaller cars initial speed? a) 67 m/s b) 30m/s c) 2.2 m/s d) 15 m/s

Civics
I had this quiz. Thank you for the answers :) Hope they are right!

FInite Math
A car rental agency has rental and return facilities at both Dallas and Austin Airports. Assume that a car rented at either airport must be returned to one or the other airport. If a car is rented at Austin, the probability that it will be returned there is .80; If a car is ...

General Chem 2
Given: Al3+(aq) + 3e– --> Al(s); E° = –1.66 V I2(s) + 2e– --> 2I–(aq); E° = 0.54 V What is ∆G° for the following cell reaction? 2AlI3(aq) --> 2Al(s) + 3I2(s) A) 4.2 × 105 J B) –6.5 × 105 J C) –1.3 × ...

algebra
George has 25 marbles. he wants to divide them into two amounts hat show a ratio of 2:3 how many marbles are in each group?

math
determine the intervals for which the curve r(t)=4sin^3(t)i+7cos^3(t)j is smooth on [0,2π

Stats Class HELP!
Twenty-five blood samples were selected by taking every seventh blood sample from racks holding 187 blood samples from the morning draw at a medical center. The white blood count (WBC) was measured using a Coulter Counter Model S. The mean WBC was 8.636 with a standard ...

Stats. Class
a. What sample size would be needed to estimate the true proportion of students at your college who are wearing backpacks, with 95% confidence and and error of +/-0.04? b. What sampling method would you recommend? Why?

Stats Class
The EPA city/hwy mpg range for a Saturn Vue FWD automatic 5-speed transmission is 20 to 28 mpg. If you owned this vehicle, how large a sample (e.g. how many tanks of gas) would be required to estimate your mean mpg with an error of ±1 mpg and 90% confidence? Explain ...

statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...

statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...

statistics
Which of the following percentiles corresponds to the area beneath the standard normal curve from a z score of-3.00 to + 3.00? a. 98% b. 100% c. 95% d. 99.7%

statistics
Jorge finds that his standardized z score on an IQ is 2.0. What percentage of people did he score higher than? a. 98 b. 96 c. 68 d. 34

math
A jar of coins has only nickels and quarters, which are worth a total of $3.25. There are 5 fewer quarters than nickels. How many quarters and nickels are in the jar?

Chemistry
Based on the mechanisms that you have determined and the information in the introduction, what is the product of 1-cholorobutane after reaction under the sodium iodide conditions? The ethanolic silver nitrate conditions?

3 questions~~~
Thanks so much! I got 100% too!!!

9th grade math
Ok, trent, so if solving for m use this formula: (Google quadratic formula to see formula) so, -b should be 24, b^2 should be -24^2, a should be 4 and c should be 36. The answer should be m=3. -------But if you are to foil this, then 4m^2-24m+36 will be (4m-12)(m-3).

Chemistry
For a reaction that has an equilibrium constant of 9 × 10–9, which of the following statements must be true? A) ∆G° is positive. B) ∆G° is negative. C) ∆H° is negative. D) ∆H° is positive. E) ∆S° is positive.

Chemistry
The standard enthalpy of fusion of iodobenzene is 9.75 kJ/mol at its melting point, 241.8 K. What is the standard change in entropy for the melting of iodobenzene at its melting point? A) –9.75 J/(mol • K) B) –311 J/(mol • K) C) 0.0403 J/(mol • K) D) ...

Chemistry
The presence of ammonia in a solution of AgCl will decrease the solubility of AgCl. True Or False

physics
is it d = 1/2 (9.8) (3)^2 = 44.1 m/s^2/3s =14.7 m/s x 2 = 32.87 = 32.87 mi/h? and b) d= 1/2 (9.8) (3)^2 =44.1 m/s^2/35 = 14.7 m/s

physics
a student drops an object out the window of the top floor of a high-rise dormitory a) neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 3.0 s? express the speed in mi/h for a familiar comparison, b) how far, in meters, does ...

physics
does this change the answer... the ball is dropped from the top of an 80-m-high building. does the ball reach the ground in 4.0 s? I got no, it falls only 78 m in 4.0 s What speed does the ball in the first question have in falling 3.5 s?

physics
a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?

physics
a car travels on a straight road. a) starting from rest, the car is going 44 ft/s (30 mi/h) at the end of 5.0 s. What is the car's average acceleration in ft/s^2 b) in 4.0 more seconds, the car is going 88 ft/s (60 mi/h). what is the car's average acceleration for this...

physics
why is it not 30-0/20=1.5 and 5/20=4 km/min = 4,000 m/min = 66.67 m/s?

physics
modern oil tankers weigh more than a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 20 min to come to a stop from a top speed of 30 km/h. What is the magnitude of a such a ship's ...

physics
a race car traveling northward on a straight, level track at a constant speed travels 0.750 km in 20.0 s. the return trip over the same track is made in 25.0 s. a) what is the average velocity if the car in m/s for the first leg of the run? b) what is the average velocity for ...

spanish - HELP!
The answer is nos!

AED
Thank you very much.

AED
I'm guessing for all ages.

AED
As we analyze Western thought vs. Eastern thought, we also should take a look at the application of each school of thought is applied. Lets say that American schools reform to include eastern philosophy in its curriculum. What steps would have to occur to prepare our students ...

please answer this one..
what is the mass in grams of one molecule of water... and is this one different from what is the mass in grans of one mole of water?

CHEMISTRY
What is the mass in grams of one Mole of water?

Chemistry
I believe it's 2.992x10^-23 grams... not sure

Chemistry
what is the mass in grams of one molecule of water?

physics
The angle of incidence and the angle of refraction for light going from air into a material with a higher index of refraction are 69.9° and 39.6°, respectively. What is the index of refraction of this material?

Math
A kite that is 7 feet tall casts a shadow that is 4 feet long. How long would the shadow be if a kite is only 4 feet tall?

Chemistry
A student has 600.0 mL of a 0.30M solution of HNO3. How much water must she add in order to make it a 0.15 M solution? Be careful how this question is answered.

social studies
i need to find if the answer to week to of my studies weekly

math
A box contains only quarters and dimes. If there 10% more quarters, the total value of the money in the box would increase by 7.5%. What is the ratio of the number of quarters and dimes in the box? Express your answer as a common fraction.

math
Mrs. Marcincavage allowed each student in her math class to drop the lowest of their five test scores. When Matthew dropped the lowest of his test scores, a 60, his test average increased by 5 points. What is Matthew’s new test average?

math
A box contains only quarters and dimes. If there 10% more quarters, the total value of the money in the box would increase by 7.5%. What is the ratio of the number of quarters and dimes in the box? Express your answer as a common fraction.

chemistry
there is a 2 a 2 not 1 but 2KClO3→ 2KCl + 3O2

chemistry
when magnesium chlorate under goes decompostion, oxgen gas is realsed in the following reaction: 2KClO3→ 2KCl + 3O2 repeat 2KClO3→ 2KCl + 3O2 when 3.50 grams of potassuim chlorate is decomposed at STP, how many litters of oxgen will be produced? chemistry - Da

chemistry
magnesium chlorate under goes decompostion, oxgen gas is realsed in the following reaction: 2KClO3 → 2KCl + 3O2 when 3.50 grams of potassuim chlorate is decomposed at STP, how many litters of oxgen will be produced?

chemistry
I said 2KClO3

chemistry
when magnesium chlorate under goes decompostion, oxgen gas is realsed in the following reaction: 2KClO3→ 2KCl + 3O2 when 3.50 grams of potassuim chlorate is decomposed at STP, how many litters of oxgen will be produced?

Chemistry
Oh, alright. thanks though x)least i know im not the only one missing something

Chemistry
Really? My college professor marked it wrong on my work.. that's exactly what i had -_-

Chemistry
name the ions: Ag+ and P-3... and it's not silver..

Chemistry
How many grams of AL(NO3)3 are produced when 23.5 grams of Aluminum react with 133 mL of 6.5M HCL?

Chemistry help
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.77 nm. It then gives off a photon having a wavelength of 94 nm. What is the final state of the hydrogen atom?

College Algebra
A ball is thrown upward with an initial velocity of 48 ft/sec from a height 640 ft. Its height h, in feet, after t seconds is given by h(t)=-16t^2+48t+640. After how long will the ball reach the ground?

Chemistry
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 7.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 8.40 ...

TN History
Ive figured most out now, but i don't know how the state government in tn restore after the reconstruction era.. any book or website that would help answering this. ive tried for a while now and im not making any progress with this one single question.

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