Posts by anon

Total # Posts: 2,829

Chemistry
PV=nRT T=PV/nR

chemistry
PV=nRT Convert grams into moles.(1/32+12) Temperature must be in Kelvin (273K) Pressure must be in atm. And R is a constant value (Google it) so V=nRT/P

Chemistry
P=nRT/V

Chemistry
A student mixes 5.0 mL of 0.00200 M Fe(NO3)3 with 5.0 mL 0.00200 KSCN. She finds that the concentration of FeSCN2+ in the equilibrium mixture is 0.000125 M. Follow these steps to determine the corresponding experimental value of Kc for the reaction of Fe3+ and SCN– to ...

Please Check My Math Answers. Thanks!
its all right. just read the questions and dont go off the numbers.

arabic!!!
3. مَا .......... ياَ أَخِي ؟ إِسْمِي سَالِم ‌أ. إِسْمُكِ ‌&#...

career
kers. They like accomplishing their work step-by-step and are good record keepers. a. conventional* b. enterprising c. social d. realistic

P.E.
About 80% of infections disease is spread by hand contact. True* False

Art
My answers: 1.b 2.d 3.d 4.c 5.d

Art
During which time period were artists keenly interested in using the golden ratio in their paintings? A.Baroque Period B.Oriental Period C.Futuristic Period D.Renaissance Period When the Greeks built the Parthenon its dimensions nearly matched the golden ratio which is the ...

Language arts
It's C

physics
Background: the Centaur impacts the moon with a velocity of 2.500 km/s (relative to the moon). Why is it acceptable to assume that the impact velocity will be consistent, even if the mass is not consistent? (Hint: think about the path that the vehicle approaches the moon)

a
yas meredith you know your medical skills

chemistry
What I was saying in the response was that with your help I got to that part, but I was still confused on the formula. I got it now. Thank you.

chemistry
I can get to the PV=nRT part. What number would you put for R?

chemistry
What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−→2KCl(s) + 3O2(g) MnO2

Physics
Please help due in less than 2 hours!! A person whose mass is m = 86.0 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 21.3° with the horizontal. What is the reading on the scale? i've tried m*g*sin(21.3) and it still ...

Physics
never mind it's 0, just seemed too simple

Physics
A cube of mass m1 = 6.8 kg is sitting on top of another cube of the same size and mass m2 = 0.7 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top cube? I've tried ...

calculus
State whether or not the following statements are true. Justify your reasoning.? a. Vector a • (Vector b + Vector c) = Vector a • Vector b + Vector a • Vector c b. Vector a × (Vector b + Vector c) = Vector a × Vector b + Vector a × Vector c c. ...

math
A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...

LA
1. b 2. a 3. c 4. c 5. a 6. d 7. c 8. a 9. c 10. b these are all 100% correct. i just took the quiz. these are the answers for CA honors english 1b unit 2: romeo and juliet lesson 3: romeo and juliet: act 1, continued

Science!!!
Inertia; a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. Just for anyone else wondering.

english
^ What are those

algebera
The guy above me is right, the ACTUAL answers are 1. B 2. A 3. A 4. A 5. B

Math
a circle is divided into 9 equal parts. What is the angle measure of two of those parts

Algebra 1
me is all right

precalculus
Find the number of negative integers greater than -500 that are divisible by 33. Also find their sum. How do I set up this problem?

Calc B/C
Assume no air friction and that the acceleration due to gravity is 10 meters/sec^2. A ball is moving horizontally at a rate of 5 meters/sec. until it falls off the edge of a platform. The height, h, of the platform would have to be ___ meters if the ball hit the ground 8 ...

Calc B/C
The common external tangents to the graphs for (x+1)^2+y^2=1 and (x-2)^2+y^2=4 are drawn. Find the slope of the tangent line that has a positive slope. I tried finding the derivatives and setting them equal to each other, but that didn't give me an answer. Please help!

Physics
A mass of 0.3 kg is attached to the end of a massless spring of spring constant 0.25 N/m. It is released from rest (t=0). After 0.7 s, the speed of the mass is measured to be 2.0 m/s. What is the amplitude of oscillation?

Calc
If y=3x^2-2, then dy/d(2x-3)= ? I've never taken derivatives with respect to anything other than a single variable, such as x, y or t, so i'm not sure how to start this problem! Thanks

math
sam you had a typo in .4 you wrote -7 it was -2 and bea miller is correct 100%

~MATH~
100% !!!!!

Language Arts
Themselves? Try again!! Remember. Personal Pronoun in the objective case...

precalculus
Solve the triangle α = 27 degrees 30', c = 52.8, a = 28.1

Math- check my answers pls
you_dont_have_the_answers is correct

Math.
Everybody's quiz is different. They change around a couple of questions in the quiz so not everybody has the same question. They're not stupid they know u guys are giving answers. So that's what some of u are getting answers wrong when ppl just give the answers to ...

Social Studies
#5 is actually just C and D

Art
Barny is right (on so many levels) lol 100% Thanks man

Physics
Instead of copy pasting every problem from loncapa why don't you try attempting them yourself?

Language Arts
B was correct thanks guys! :)

english check
Treat the Earth and all that dwell thereon with respect. Remain close to the Great Spirit. Show great respect for your fellow beings. Work together for the benefit of all Mankind. Give assistance and kindness wherever needed. Do what you know to be right. Look after the well ...

Social Studies
the answer is c.spain

english
1. The Cherokee people are being addressed and it is written in first, second, and third person. 2. Respect to the people around you, cooperation, giving and showing kindness, honesty and truthfulness, taking care of yourself. 3. They Cherokee people follow these commandments ...

english
Treat the Earth and all that dwell thereon with respect. Remain close to the Great Spirit. Show great respect for your fellow beings. Work together for the benefit of all Mankind. Give assistance and kindness wherever needed. Do what you know to be right. Look after the well ...

LA
I can't process what just happened- Salty people are salty. Recent answers are right btw.

Language Arts
B is correct

Language Arts
What does Johnny’s mastery of riding Goblin show about his character? A. He is rash and quick-tempered. B. He is brave and determined. C. He is immature and selfish. D. He is arrogant and proud

Language Arts
Correct! Thanks guys!

math
x+4x/15-x=-7/3-3/5 (bringing like terms together) 4x/15=-7/3-3/5 (Make the denominator common by multipying 3 with 5 and 5 by 3)(Also multiply the numerator by the same numbers) 4x/15=-35-9/15(15 cancels out on both sides) 4x=-44 (divide 44 by 4) x=-11

Science
C B B B 100%

Art
Diana is correct!

language art
Think about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you completed help you ...

LA - 1 question
THANKS SO MUCH SANTANA! got 100% because of your answers!!

Johnny Tremain
pacman is right

algebra
9 to 12. 9+12=21 21/2=10.5

Chemistry
If 4.5 moles of elemental carbon react, what volume of carbon dioxide will be produced at STP?

Langague Arts 8th Grade
anyone know the answers for this?

Langague Arts 8th Grade
What did you get for your answers?

Calculus
a balloon rises straight up to 5 ft/sec. and a crying child who lost the balloon is standing 40 ft away. how fast does the balloon move away from the child when it is 30 ft above the ground?

History
WHAT ARE THE ANSWERS TO THE ONES I GOT WRONG I DON'T GET THEM AT ALL

anon
<script>alert('hey')</script>

Math
find the distance between point A(5,3) and point B (1,0) on a graph using the Pythagorean Theorem.

Math
a line has a slope of 6 and a y-intercept of –10. which is the equation in slope intercept form

Math
Solve the system of two equations 2y=8 and 15y=2x-4

math
overnight the low temperature dropped to -6 degrees Fahrenheit. If the high temperature during the day was 11 degrees Fahrenheit, what was the difference between the high and low temperatures? Please help, thank you so much!

Math
the conductor looked at his pocket watch to see what time the train would be leaving. it read 8:37 pm. if it takes the polar express 3 hours and 15 minutes to get to the north pole, what time will it be when it arrives?

Algebra 1
1,0

Science
Can an egg or sperm be formed through mitosis?

L.A help please
Thanks Ms. Sue! :)

Social Studies help
^^ @Pacman is correct

science
14. False

Chemistry
Thank you. You're the best the best the best.

Chemistry
2HCl+Pb(NO3)2---> PbCl2 (s)+2HNO3 Can you please tell why this is not an acid base reaction?

Chemistry
How do you know that a given reaction is not an acid base reaction? (apart from the fact that it should have an acid and a base and it should be a double displacement reaction)? I mean I know acids have protons (H+) and bases have hydroxides (OH-) but there are so many other ...

Chemistry
I have got the answer but can you explain me which formula you used after calculating q in part 1?

Chemistry
2C2H6+702---->4CO2+6H20 DELTAH= -3120.6 kJ/mol What mass of ethane must be combusted in order to heat 366 g of water from 25 degree celcius to 100 degree celcius? Assume the heat transfer is 100% efficient. a)44.1 g b) .903g c) 3.61g d) 2.21 g Should I approach this problem...

AP Calc BC
Solve the differential equation y'= radical(x)/(-3y) i made y' dy/dx and moved the y's to one side and the x's to the other, and ended up with y^2=(-4/9)x^3/2 + c, but i'm not sure if that's write, and is that the form i'm supposed to leave it in?

AP Calc B/C
The base of a solid is the region enclosed by y=x^3 and the x-axis on the interval [0,4]. Cross sections perpendicular to the x-axis are semicircles with diameter in the plain of the base. Write an integral that represents the volume of the solid. I drew a picture, but I ...

Langue Art
They are all right. 100%!

Chemistry
Got it. Thank you so much

Chemistry
Consider the thermal decomposition of potassium chlorate. 2 KClO3 (s)-----> 2 KCl (s) + 3 O2 (g) A mixture containing KCl and KClO3 weighing 1.80 g was heated producing 1.40 x 102 mL of O2 gas at STP. What percent of the original mixture was KClO3? Is this how I should ...

chemistry
Is the total pressure 1 atm because the questions says STP?

chemistry
I used PV=nRT for both the gases but I am not getting the right answer. Please help

chemistry
Suppose 100 mL of NO at STP is mixed with 400 mL of O2 at STP. 2 NO (g) + O2 (g)---> 2 NO2 (g) After the reaction goes to completion, what is the partial pressure of NO2 in the resulting mixture of gases at STP? I know the relation between pressure and volume is P1V1=P2V2, ...

chemistry
In the context of chemistry and the periodic table , periodicity refers to trends or recurring variations in element properties with increasing atomic number . Periodicity is caused by regular and predictable variations in element atomic structure .

math
what are two fractions both not positive who has a product of 5/8

Math
You have an ear infection and are told to take a 200 mg tablet of ampicillin (a common antibiotic) four times a day (every six hours). It is known that at the end of six hours, about 5% of the drug is still in the body. What quantity of the drug is in the body right after the ...

chemistry
Calculate the amount of heat required to heat a 4.0kg gold bar from 20∘C to 61∘C. Specific heat capacity of gold is 0.128 J/g∘C. How do we figure this out?

English
B C B B

please help (algebra)
What is the error and correction in finding the difference? 3/4 - 9/2 = 3 - 9/4 - 2 = (-6/2) = -3

Math
I mean $10.00 for every oil change

Math
jody gets paid $200.00 per week, plus $100.00 for every oil change she completes. write the equation that shoes the relationship between the number of oil changes and her weekly income. then write the slope of the line that represents the relationship

language arts
The answer is D

Calculus
Find critical points for y'=2/3x^3-4x

language arts
The answer is C

Chemistry
estimate Delta H for the following reaction C2H4 (g)+3O2(g)→2 CO2(g)+2 H2O(g) So we have (4) C-H bonds and (1) C=C bond or (H = 4*414 + 615= 2271) For oxygen, (3) O=O bonds or (H = 3*502=1506) 2CO2 is (2) O=C=O (H=730*4=2920) 2H2O is (2) H-O-H or (H=4*464=1856) Delta H...

chemistry
6. Ligands approaching in a square planar pattern cause some orbitals to be raised in energy. How many orbitals are on the highest energy level? a. A) 1 b. B) 2 c. C) 3 d. D) 4 e. E) 5

chemistry
Conductivity experiments indicate that tetraamminedichloropalladium (IV) chloride is composed of 3 moles of ions per mole of compound. When silver nitrate solution is added to a solution of the palladium compound, 2 moles of silver chloride per mole of compound are ...

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