Sunday

August 28, 2016
Total # Posts: 2,543

**chemistry**

If a 1.60 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq)<---> 2B(aq) Kc=9.63x10^-6
*April 11, 2014*

**biology**

heterozygous red = Rb homozygous red= RR blue=bb
*April 11, 2014*

**Spanish**

Thank you so much!
*April 10, 2014*

**Spanish **

Are my answers correct? Parte I: Conteste las preguntas en frases completas en español 1. ¿Qué significan las palabras te y té? Te es un pronombre, mientras que el té es una bebida. 2. ¿Prefiere Ud. usar el tiempo futuro o IR A + ...
*April 10, 2014*

**Biology**

ystic fibrosis is caused by mutations in the CFTR gene, which encodes for a chloride channel. You are studying cystic fibrosis patients to determine what mutation they possess in the CFTR gene. The difference between the mutant and wild type CFTR can be uncovered by examining ...
*April 10, 2014*

**Science **

explain how a microclimate can affect crop production I need someone to explain this to me because i don't get it
*April 7, 2014*

**Science**

Describe how a large water body can affect the amount of snowfall a region receives in the winter.?
*April 7, 2014*

**Biology**

How do endotherms and ectotherms differ? a) Endotherms are warm-blooded and ectotherms are cold-blooded. b) Endotherms and ectotherms differ in the means by which they regulate their body temperature. c) Endotherms are regulators and ectotherms are conformers.
*April 7, 2014*

**Biology**

Select the correct statement describing feedback control in animals. Select the correct statement describing feedback control in animals. a) All ectotherms are conformers with respect to temperature. b) An animal may be a regulator for one environmental variable but a ...
*April 7, 2014*

**algebra**

divide 15x^2 + 10x -5 by 5x
*April 4, 2014*

**Math**

Each square represents 625 square feet, each line segment represents 25 feet. A galapagos tortoise must use 550 feet of fencing to enclose a space of 15,000.
*April 4, 2014*

**algebra**

thanks
*April 3, 2014*

**algebra**

solve the equation 3/ (x+1) - 1/x =1/2
*April 3, 2014*

**Spanish**

Are my answers correct? I had the most trouble with the accents in part II. Thank you. Part I Llene los espacios en blanco con la forma correcta del verbo en la forma del presente progresivo utilizando el verbo ESTAR con el gerundio. 1. Sé que vosotras no _____ ...
*April 2, 2014*

**Chemistry**

For the reaction: 2H^+(aq)+Zn(s)----->He2(g)+Zn^2+(aq) a) Write the reduction half-reaction b) Write the oxidation half-reaction c) Identify the oxidizing agent d) Identify the reducing agent
*April 2, 2014*

**math**

Alvin, Calvin and Melvin each have some positive integer number of sweets. Alvin has fewer sweets than Calvin, and they have 29 sweets in total. Melvin has 26 sweets more than Alvin. What is the maximum number of sweets that they can all have in total?
*April 2, 2014*

**math**

Adam and Bob went apple picking in an orchard. At the end of the day, they realized that if Adam had picked 50 more apples, he would have picked twice as many as Bob picked. On the other hand, if Bob had picked 50 more apples, he would have picked twice as many as Adam picked...
*April 2, 2014*

**Physics**

After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/5 their initial speed. Find the angle between the initial velocities of the objects.
*April 1, 2014*

**Spanish **

Am I correct? I. Conteste las preguntas utilizando mandatos formales. Trate de usar pronombres cuando posible. 1. ¿Es necesario apuntar la dirección? No, lo me no apunte la dirección. 2. ¿Debo sacar el plano de la ciudad? Saquelo. 3. ¿Es ...
*March 28, 2014*

**history**

how did Japan consolidate its hold over its people during the interwar period?
*March 25, 2014*

**Urgent Chemistry**

The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{-15}\; g) and is swimming at a velocity of vv = 7.00ìm/s\mu m/...
*March 22, 2014*

**Chemistry**

The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{-15}\; g) and is swimming at a velocity of vv = 7.00ìm/s\mu m/...
*March 21, 2014*

**Chemistry**

The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{-15}\; g) and is swimming at a velocity of vv = 7.00ìm/s\mu m/...
*March 21, 2014*

**Trigonometry**

Let (7,-3) be a point on the terminal side of theta. Find the exact values of cos of theta, sec of theta and cot of theta?
*March 20, 2014*

**chemistry**

in which of the following pairs of compiunds are both members of the pair ionic compounds? a) PI3 and HBr, b) H2S and NCl3, c)LiF and H2O, d)LiI and NiO
*March 18, 2014*

**Basic English**

9. Which of the following sentences contains a comma splice? A. Our friend, who travelled from Tennessee, was quite tired when he arrived. B. The kitten climbed the drapes, it couldn't figure out how to get down. C. The cruise ship docked on Oahu, then again on Maui. D. We...
*March 18, 2014*

**chem**

which of the following compound contain more than 10 atoms per formula: a)ammonium phosphate, b) aluminium carbonate, C)iron(III) cyanide,
*March 17, 2014*

**Chemistry**

Thank you so much. I figured out what I did wrong.
*March 16, 2014*

**Chemistry**

This is a problem I got on my Mastering Chemistry homework: Consider the following reaction: H2(g)+I2(g)⇌2HI(g) A reaction mixture at equilibrium at 175 K contains PH2=0.958atm, PI2=0.877atm, and PHI=0.020atm. A second reaction mixture, also at 175 K, contains PH2=PI2= 0...
*March 16, 2014*

**Physics**

A man wishes to cross a river from A to B, a distance of 800m. He can row at 8km per hour, in what direction should he head the boat to travel directly from A to B? How long does it take him to reach B? Please show working. Thank You!
*March 16, 2014*

**Psychology**

What is the definition for "Practical problems" and "Ethical problems"
*March 13, 2014*

**Math**

how much should rod pay for a 10 year annuity that provides month end payments of 1800 at 4.5% compounded quarterly
*March 12, 2014*

**PLZZ HELP ME WITH THIS MATH MS SUE.**

The answer is 2cm. 15/3 is 5, so 63 is 2.
*March 12, 2014*

**Chemistry Urgent**

95.0mL of H2O is initially at room temperature (22.0∘C ). A chilled steel rod at 2.0∘C is placed in the water. If the final temperature of the system is 21.3∘C , what is the mass of the steel bar? Specific heat of water = 4.18 J/g⋅∘C Specific heat...
*March 11, 2014*

**Chemistry Urgent**

A calorimeter contains 32.0mL of water at 13.0∘C . When 2.30g of X (a substance with a molar mass of 82.0g/mol is added, it dissolves via the reaction X(s)+H2O(l)¨X(aq) and the temperature of the solution increases to 30.0∘C . Calculate the enthalpy ...
*March 11, 2014*

**chemistry**

95.0mLmL of H2O\rm H_2O is initially at room temperature (22.0∘C\rm{} ^{\circ}C). A chilled steel rod at 2.0∘C\rm ^{\circ}C is placed in the water. If the final temperature of the system is 21.3∘C^{\circ}C, what is the mass of the steel bar? Specific heat of ...
*March 11, 2014*

**Science Help PLEASE!!**

ty
*March 11, 2014*

**Chemistry**

Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be done to step ...
*March 9, 2014*

**chemistry**

Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol
*March 9, 2014*

**chemistry**

Consider the following problem: Target: 2NOCl (g) ¡æ N2 (g) + O2 (g) + Cl2 (g) ¥ÄHrxn= ? Steps: 1. ¨ö N2(g) + ¨ö O2(g) ¡æ NO(g) ¥ÄH= 90.3 kJ 2. NO(g) + ¨ö Cl2(g) ¡æ NOCl(g) ¥Ä H= -38.6 kJ...
*March 9, 2014*

**chemistry**

Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol
*March 9, 2014*

**math**

can you help me With my homework.
*March 8, 2014*

**prealgebra**

Caitlin's cylindrical jar holds 525 cubic inches. If the height of the jar is 7 inches what is the approximate diameter?
*March 6, 2014*

**Math**

How do you find the derivative of ln(xy)=x+y
*March 3, 2014*

**Geometry/Trig**

A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.
*March 3, 2014*

**trigonomentry**

Ada travels from A on a bearing of 60˚ to station B on a distance of 15km.she then leaves to station C 10km away from B due east of station
*March 2, 2014*

**maths**

now there is a pool, the height of the pool is 48cm and the width is 2m, now 3 quarters are full, what will be the final answer in litres?
*March 2, 2014*

**Chemistry**

How has crude oil changes the country (positive and negative points)
*March 1, 2014*

**Analytical Chemistry**

A - 1 B-3 C-2 D-4 E-5 F-6 G-7
*February 28, 2014*

**social studies**

Can someone help me with number 9?
*February 27, 2014*

**geometry**

Circle the following quadrilateral that does Not have at least one pair of consecutive sides congruent. (A) rhombus (B)kite(C)isosceles trapezoid(D) square Circle the following quadrilateral that may have exactly one pair of consecutive sides of congruent. (A)rhombus (B) kite(...
*February 26, 2014*

**Science help ms sue.**

Number 2 was B, and number 5 was A
*February 25, 2014*

**statistics **

Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 | 1 2 6 6 6 6 8 9
*February 23, 2014*

**statistics**

Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a one-way ticket airfare between two cities MN. Key: 21|1=211 21 | 1 2 22 | 1 1 1 2 3 5 7 8 23 | 2 3 4 7 7 8 9 9 24 | 2 3 4 8 8 25 | 1 2 6 6 6 6 8 9
*February 23, 2014*

**Physics**

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 26.5 cm) 15.1 cm away from an object. Find the image distance. Answer in units of cm
*February 21, 2014*

**PLS HELP ME WITH ONE MATH QUESTION!!???**

I got 100% too. Thanks. I thought number 3 was 2.
*February 19, 2014*

**Social Studies**

Thanks so much for the answer Ms. Sue. Almost every single last answer you've ever given someone has been true, and I appreciate it so much!! I get 100% on almost every test because of you.
*February 10, 2014*

**Chemistry**

Thank you!
*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...
*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...
*February 10, 2014*

**Chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury? =$1.99 What is the price of one gram of mercury? =$...
*February 10, 2014*

**Math Urgent help please**

A lamppost casts a shadow of a man who is standing 15 feet away from the lamppost. The shadow is 5 feet long. The angle of elevation from the tip of the shadow to the lamp is 50. To the nearest foot, the lamppost is _____ feet tall. (Points : 2)
*February 10, 2014*

**math --- pls check my work!**

You must be extremely smart. I got a 100%, because of you. Thanks so much for your help. Keep up the good work, so that I can too!! xD
*February 3, 2014*

**SICK**

no matterfact I am sorry im not going to argue with teachers because that is very wrong.but I can give you all links to questions I posted through out the week with no answers??
*February 1, 2014*

**SICK**

ive been posting the same question for 2 days and you guys have been ignoring me no joke -_-
*February 1, 2014*

**Math**

Angie read 2 books in 5 days, and each book contained 340 pages. If Angie read the same number of pages each day, how many pages did she read per day? A.)75 B.)340 C.)680 D.)136
*February 1, 2014*

**social studies(CHECK ASNWERS)**

please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few key leaders. C.It ended ...
*January 31, 2014*

**socialstudies(CHECK ANSWERS)**

PLEASE CHECK MY ANSWERS please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few ...
*January 31, 2014*

**chemistry**

Need help balancing this chemical reaction equation Ca(NO3)2+2NaOH>Ca(OH)2+2NaNO3
*January 30, 2014*

**Calculus**

Find the critical numbers of the function. h(t) = t3/4 − 5t1/4
*January 28, 2014*

**Calculus**

A poster is to have an area of 160 in2 with 1 inch margins at the bottom and sides and a 7 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)
*January 28, 2014*

**Calculus**

Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = (x2 - 1)3 [-1, 6]
*January 28, 2014*

**Calculus**

Find the absolute minimum and absolute maximum values of f on the interval below. f(x) = x4 - 8x2 + 6 [-3, 4]
*January 28, 2014*

**Calculus**

Find two numbers whose difference is 132 and whose product is a minimum.
*January 28, 2014*

**Calculus**

A box with a square base and open top must have a volume of 4,000 cm3. Find the dimensions of the box that minimize the amount of material used.
*January 28, 2014*

**Calculus**

A poster is to have an area of 160 in2 with 1 inch margins at the bottom and sides and a 7 inch margin at the top. What dimensions will give the largest printed area? (Give your answers correct to one decimal place.)
*January 28, 2014*

**Please help with Physics Quickly**

1. How are impulse and momentum related? (Points : 1) Impulse is the change in momentum of an object. Momentum is the change in impulse acting on an object. Impulse and momentum are always equal in magnitude. Impulse and momentum are the same thing. Question 2. 2. Which of ...
*January 27, 2014*

**Psychology **

Within each gene, elements of DNA are arranged in a particular order, forming a code that influences the synthesis of particular proteins. This code affects every aspect of the body, from its structure to the chemicals that keep it running. The above process describes:
*January 27, 2014*

**chemistry**

What is the concentration of a solution, in gsolute/100gsolvent, made using 2.29 g of KNO3 in 2.03 g of H2O?
*January 24, 2014*

**Social Studies**

The answer is A, lily
*January 23, 2014*

**History8**

the correct answer is d you guessed correct! Good job!!!
*January 16, 2014*

**literature**

Can someone help me in scansion of the poem "the poplar field" by William Cowper? need help to find base meter, scheme, stanza forms if any, and the metrical peculiarities such as end-stopped lines, run-on lines, elision, pause, feminine ending, masculine ending and ...
*January 15, 2014*

**Math**

the length of a rectangle is seven less than four times the width. Find the length if the area is 65 square units.
*January 11, 2014*

**SS**

Cowgirl is correct.^^ A A B D I got 100%
*December 30, 2013*

**physics**

A mass M of 7.00E-1 kg slides inside a hoop of radius R=1.30 m with negligible friction. When M is at the top, it has a speed of 5.47 m/s. Calculate the size of the force with which the M pushes on the hoop when M is at an angle of 39.0°.
*December 24, 2013*

**language arts**

#4. C
*December 18, 2013*

**language arts**

This the passage for #2 &3: I checked into a hotel called the Olympia, which is right on the main street and the only hotel in the town. After lunch I was hanging around the lobby, and I got to taking to the guy at the desk. I asked him if this wasn't the town where that ...
*December 18, 2013*

**help plz? 2 questions**

HA! Is that from connexus!
*December 17, 2013*

**Physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...
*December 17, 2013*

**Physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...
*December 17, 2013*

**physics**

A stone is thrown vertically upward at a speed of 27.70 m/s at time t=0. A second stone is thrown upward with the same speed 2.140 seconds later. At what time are the two stones at the same height? At what height do the two stones pass each other? What is the downward speed of...
*December 15, 2013*

**science**

How does biodiversity increase an ecosystem's ability to withstand changes? I don't quite understand. Can you please elaborate?
*December 13, 2013*

**science**

If you need the answers for the complete test let me know.. I got 100% on this test.
*December 12, 2013*

**Math**

wait what does short mean?
*December 11, 2013*

**Algebra **

A roadside vegtable stand sells pumpkins for $5 each and squashes for $3 each. One day they sold $6 more squash than pumpkins, and their sales totaled $98. Write and solve a system of equations to find how many pumpkins and squash they sold?
*December 10, 2013*

**Chemistry**

In a solution with carbon tetrachloride as the solvent, the compound VCl4 undergoes dimerization: 2VCl4 <-> V2Cl8 When 6.6834 g VCl4 is dissolved in 100.0 g of carbon tetrachloride, the freezing point is lowered by 5.97*C/ Calculate the value of the equilibrium constant ...
*December 10, 2013*

**math**

It's okay I gotcha and anybody else here who needs help <3 it is D aka both a and b so the last one guaranteed :)
*December 9, 2013*

**21**

help me 9th gradge
*December 4, 2013*

**math**

45yards/minutes=______in./s
*December 2, 2013*