Saturday

August 1, 2015

August 1, 2015

Total # Posts: 2,884

**Gen Chem**

In an experiment I used .139 grams of an Alka Selzter table. A question asks us to determine the amount of CO2 dissolved in 5.10ml of 6M HCl. How do you go about solving such a problem?
*November 22, 2014*

**9th grade math**

The depth of water(d metres) in a harbour is given by the formula d = a+bsin(ct) where a, b and c are constants, and t is the time in hours after midnight. It is known that both b and c are non-zero and 20<c<35. If t=midnight, d=5; if t=noon, d=5; if t=1300, d=7; and if...
*November 20, 2014*

**math**

This is a 9th grade math problem by the way.
*November 20, 2014*

**math**

The depth of water(d metres) in a harbour is given by the formula d = a+bsin(ct) where a, b and c are constants, and t is the time in hours after midnight. It is known that both b and c are non-zero and 20<c<35. If t=midnight, d=5; if t=noon, d=5; if t=1300, d=7; and if...
*November 20, 2014*

**English - Grammar**

What tense is this verb ? The state police were pulling over many drivers? I think its past progressive but i don't know if it would also be considered past perfect progressive. what principle part is used to form the verb in each sentence? 1.The workers will have finished...
*November 18, 2014*

**geometric progression**

the 3rd term of a gpis 10 and the 6th term is 80 find the common ratio No2 if the 2nd term of a gp is 4 and the 5th term is 1over 16,the7th term is_
*November 18, 2014*

**Pre Albergra**

Simplify. x5y4x3y6
*November 16, 2014*

**Pre Albergra**

The Pentagons ABCDE and PQRST are Similar: Find the length x of TP
*November 16, 2014*

**English**

What is the purpose of Annabel Lee by Edgar Allan Poe? What are some qualities and Character traits about of the Speaker in Annabel Lee? I need at least 5. so far I got romantic, dedicated, crazy, and obsessive .
*November 16, 2014*

**English**

What is moral lesson in Annabel Lee?
*November 16, 2014*

**Calculus**

The maker of an automobile advertises that it takes 11 seconds to accelerate from 15 kilometers per hour to 90 kilometers per hour. Assuming constant acceleration, compute the following. What is the distance the car travels during the 11 seconds (Round your answer to two ...
*November 14, 2014*

**Chemistry (Equilibrium)**

ooh, thank you!
*November 13, 2014*

**Chemistry (Equilibrium)**

Keq = (0.0855)^2/0.5-0.171 = 0.00731025/0.329 = 0.0222 Keq = 0.0222 is this correct?
*November 13, 2014*

**chemistry**

why do we use the limiting reactant data to calculate delta h? why might it be important to know delta h prior to running a reaction?
*November 13, 2014*

**Equilibrium**

I get 3.918... so does that mean I round up to 4.0? so the answer would be C?
*November 13, 2014*

**Equilibrium**

oh I realized, I have my 0.53M on 2SO2 and not 2SO3. Keq = (0.53-0.30)^2/(0.30)^2(0.15) = 0.26 Is this correct? :)
*November 13, 2014*

**Equilibrium**

2 SO2(g) + O2(g) <==> 2SO3(g) Initially, 1.6mol SO3 is placed in a 3.0L container. At equilibrium, [O2] = 0.15M. What is the value of Keq? A. 0.26 B. 1.2 C. 4.0 D. 43 My work: ...2SO2...+...O2...<==>...2SO3 I 0.53M.....-----.........----- C +0.15.....+0.15........-...
*November 13, 2014*

**statistics**

I have no idea how to solve this. In a sample of 16 students, 15 were right-handed. Can we construct a 95% confidence interval for the proportion of all students who are right-handed?
*November 12, 2014*

**Chemistry (Equilibrium)**

Thanks very much!
*November 12, 2014*

**Chemistry (Equilibrium)**

Consider the following equilibrium system at 900°C: H20(g) + CO(g) <==> H2(g) + CO2(g) Initially 5.0 moles of H2O and 4.0 moles of CO were reacted. At equilibrium, it is found that 2.0 moles of H2 are present. How many moles of H2O remain in the mixture? Would be ...
*November 12, 2014*

**Math**

Maria has 24ft of fence.she wants to make the lalgest rectangular area possible for her dog.what length should she make each side
*November 12, 2014*

**Algebra 2 **

How do I solve this using the Quadratic formula and finding the determinant? 1. 5x-6=0 2. x+25=0
*November 12, 2014*

**English**

I know this sounds dumb, but what do you call people who are rich but they act normal, don't try to show off at all, and is very kind.
*November 11, 2014*

**Calculus**

BoxedNGone truck rentals calculates that its price function is p(x)=160-2x,where p is the price (in dollars) at which exactly x trucks will be rented per day. Find the number of trucks that BoxedNGone should rent and the price it should charge to maximize revenue. Also find ...
*November 9, 2014*

**English (Grammar)**

What part of speech is the infinitive phrase used? Is this a noun, adjective, or adverb? 1. The coach's example is one to take seriously. 2. We all made an effort to work harder. 3. The contest requires all entries to be mailed by Thursday. 4. The players were eager to try...
*November 9, 2014*

**Math**

You are measuring walnuts for banana walnut oatmeal and a spinach and walnut salad. You need 3/8 cup of walnuts for the oatmeal and 3/4 cup of walnuts for the salad. You have a 1/4-cup scoop. Describe two different ways to find how many scoops of walnuts you will need. PLEASE ...
*November 5, 2014*

**Chemistry **

A piece of copper of mass 21.3 g at 106.0 °C is placed in a vessel of negligible heat capacity but containing 53.0 g of water at 19.3 °C. Calculate the final temperature of the water. I keep getting 22 celsius and I'm not sure where I'm going wrong. I plug it ...
*November 4, 2014*

**Math**

Determine the exact radian measure for each angle. 40 degrees.
*November 4, 2014*

**Calculus **

Find all relative extrema. Use the Second Derivative Test where applicable. f(x)= cosx - x (0,2ð)
*November 3, 2014*

**Chemistry**

Calculate the enthalpy change for: C2H4(g) + H2 --> C2H6(g) delta Hrxn: H2(g) + 1/2O2 --> H2O (l) C2H4(g) + 3O2 --> 2H20(l) + 2CO2(g) C2H6(g) + 7/2O2(g) --> 3H20(l) + 2CO2(g) I know I have to flip the third reaction but I dont know what to do next
*October 29, 2014*

**Physics**

A volleyball is launched straight up at an initial velocity of 2.3 m/s. It is then spiked by a taller player 0.8 meters above the launch height. How high did it rise, and how long did the volleyball remain in the air between the players?
*October 29, 2014*

**Science**

So its the 1st one?:)
*October 29, 2014*

**Science**

When evolution was first proposed, which of the following was used as evidence to support the idea? 1.observations of nature 2.laboratory experiments 3.extensive fossil collections 4.genetic sequences I think its either 1 or 4
*October 29, 2014*

**Math**

What is the quotien of 148 ➗32 ? Help I need it now
*October 28, 2014*

**Writing**

I need help with writing an essay about simple questions, complicated questions, and complex questions. I need to make a topic, write 3-5 paragraphs, describe and explain, write it as an expository essay, and write one paragraph about how it helps us in every day life.
*October 28, 2014*

**algebra math**

Which one of the following is a geometric sequence? A. 2, –3, 9⁄2, −18⁄4 B. 0,1,2,3,... C. 8,4,2,1,1⁄2,1⁄4,... D. –7,10,23,36,.. i think the answer is D Can please check it ?
*October 28, 2014*

**Fractions**

Fiona and camila took a load of peaches to the farmers market. During the first hour , they sold 1/2 of the peaches plus 1/2 of a peach. In the second hour, they sold 1/3 of the remaining peaches plus 1/3 of a peach. In the third hour , they sold 1/4 of what was left and 3/4 ...
*October 26, 2014*

**Math**

Fiona and camila took a load of peaches to the farmers market. During the first hour , they sold 1/2 of the peaches plus 1/2 of a peach. In the second hour, they sold 1/3 of the remaining peaches plus 1/3 of a peach. In the third hour , they sold 1/4 of what was left and 3/4 ...
*October 26, 2014*

**Chemistry **

A buffer solution of volume 100.0 mL is 0.140 M Na2HPO4(aq) and 0.120 M KH2PO4(aq). What are the pH and the pH change resulting from the addition of 55.7 mL of 0.0100 M NaOH(aq) to the buffer solution?
*October 21, 2014*

**Biology**

Why can the identity of a compound not be determined by cutting out the spot on an autoradiogram and subjecting it to chemical analysis?
*October 21, 2014*

**Eng**

I'm doing project on What are Media racism on Islam & Muslim? Networks etc.and resources where can I can find it Thank you!
*October 20, 2014*

**Stats**

So i have a test in stats tomorrow and im trying to work on my study guide but im stuck at this question : Construct a confidence interval for the proportion for each case 90 percent interval 861 out of 2500. please help.
*October 19, 2014*

**Chemistry**

The change in mass was 0.0910g
*October 18, 2014*

**Chemistry**

Weight of empty crucible and cover = 23.104 g Weight of crucible, cover, MgO and Mg3N2 = 24.199 g Weight of crucible, cover, MgOand addition of H2O and heat = 24.290 Calculate the number of moles of Mg3N2.
*October 18, 2014*

**Intermediate Algebra**

it takes beth 6 hours to do homework and it takes nina 9 hours. how many hours would it take if they did their homework together?
*October 18, 2014*

**physics**

A shell is fired from the ground with an initial speed of 1.53 ✕ 103 m/s at an initial angle of 55° to the horizontal.
*October 16, 2014*

**Chemistry**

A 2.764 g sample containing only iron and aluminum metal was treated with acid to form Al(+3) and Fe(+2). The sample was then titrated with a potassium dichromate solution (only the Fe(II) will react with the dichromate). The sample was found to be equivalent to 14.36 mL of 0....
*October 16, 2014*

**Chemistry**

A student determines the iron (II) content of a solution by first precipitating it as iron (II) hydroxide, and then decomposing the hydroxide to iron (II) oxide by heating. How many grams of iron (II) oxide should the student obtain if her solution contains 46.0 mL of 0.426 M ...
*October 16, 2014*

**Chemistry**

Calculate the number of milliliters of 0.782 M KOH required to precipitate all of the Mn2+ ions in 112 mL of 0.461 M Mn(NO3)2 solution as Mn(OH)2.
*October 16, 2014*

**Physics**

A balloon, when rubbed against denim, gains a charge of -10ìC. The force between the balloon and the denim when they are separated by a distance of 5 cm is:
*October 13, 2014*

**u.s. history**

How did the rise of labour unions shape relations among workers, big business, and government?
*October 13, 2014*

**Chemistry**

a 175.0 ml solution is made up of 20.0g of titanium(iii) chloride and H2O. What is it's molarity? I am just trying to check my work. M= 0.1296/0.175 =0.740
*October 11, 2014*

**Math help 1 question!!!!!!!!**

I meant C, sorry!!!
*October 10, 2014*

**Math help 1 question!!!!!!!!**

I think its D?
*October 10, 2014*

**Math help 1 question!!!!!!!!**

14. Which statement is true? A. Every rational number is a square root. B. Every irrational number is a fraction. C. Every rational number can be written as a fraction. D. Every square root can be written as a whole number.
*October 10, 2014*

**physics**

A basketball player is standing on the floor 10.0 m from the basket as in the figure below. The height of the basket is H = 3.05 m, and he shoots the ball at an angle, è = 42.8°, with the horizontal from a height of h = 2.04 m. (a) What is the acceleration of the ...
*October 7, 2014*

**statistics**

You should standardize her test scores, which means find the z-score of each and compare the two.
*October 7, 2014*

**phi 208**

To check my reading week 4 quiz
*October 5, 2014*

**physics help**

I know that the answer to this problem is (0.2237232293) and to begin it by making a force body diagram, but I need help setting up the equation(s). Thanks! A box rest on an incline making a 30 angle with the horizontal. It is found that a parallel force to the incline of at ...
*October 3, 2014*

**physics urgent**

I need help with this problem. I know the answer is (2.1630342940) but I have no idea how to get there. I know i need to sum the forces for each. Block m1( 6 kg ), lies on an incline plane with a coefficient of kinetic friction of 0.15. m1 is connected to mass m2 by a massless...
*October 3, 2014*

**Chemistry**

The combustion of hexane can be represented by the following equation: __C6H14 (g) + __O2(g) → __CO2(g) + __H2O(g) What is the mass of carbon dioxide produced?
*October 1, 2014*

**Finite**

Assume that the producer has 7 skits and 5 commercials available. Skits can't be repeated, commercials can.
*September 28, 2014*

**Physics**

A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the string when the ball is at...
*September 28, 2014*

**Physics**

A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the string when the ball is at...
*September 28, 2014*

**Algebra**

The selling prices of houses in a city during one year were normally ditributed with a mean of $259,000 and a standard deviation of $15,000. Which of the following is closest to the percentage of the homes that had a selling Price between $244,000 and $289,000? a. 81.8% b. 47....
*September 23, 2014*

**PHI208 week 4 reading**

How are you supposed to show your work?
*September 22, 2014*

**PHI208 week 4 reading quiz**

Ok!!!!!! But that's what everyone is doing!!
*September 22, 2014*

**PHI208 week 4 reading quiz**

What? That's what everyone is doing on here
*September 22, 2014*

**PHI208 week 4 reading quiz**

Robinson agrees with aquinas idea that? Honor is a subjective quality Honor is secondary to integrity Honor must be displayed in action Honor is secondary to magnanimity None of the above
*September 22, 2014*

**physics**

the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force
*September 19, 2014*

**Social Studies**

What are some differences between the European and Taino (Native American) ways of life and cultures? Desperate for anything. I've been researching for hours but can't find ANYTHING.
*September 19, 2014*

**Math**

A cone is 8cm high and its vertical angle is 62 degrees,find the diameter of its base
*September 19, 2014*

**Mathematics**

An isosceles triangle has a vertical angle of 116 degrees and its base is 8cm long.calculate its height
*September 19, 2014*

**Chem**

A 28.3 g piece of unknown metal is dropped into a graduated cylinder that has an initial volume of 14.2 mL. If the final volume of the cylinder is 16.7 mL, determine the identity of the unknown metal from its density.
*September 17, 2014*

**physics**

A glider of length 12.7 cm moves on an air track with constant acceleration. A time interval of 0.563 s elapses between the moment when its front end passes a fixed point circled A along the track and the moment when its back end passes this point. Next, a time interval of 1....
*September 17, 2014*

**PHI208 week 4 media quiz**

Of the following, which is the most estimate of the amount of days Phil Conners(bill Murray) was stuck in the loop? (From ground hog day)
*September 16, 2014*

**math**

what is the purpose of changing radicals to rational exponent and changing rational exponent to radicals?
*September 16, 2014*

**math**

what is the importance of lowering the index of radicals?
*September 16, 2014*

**math**

give reasons of solving rational exponent or radicals in terms of, addition, subtraction, multiplication and division.
*September 16, 2014*

**Pre-Calculus**

Find all the real zeros of the polynomial. Use the quadratic formula if necessary. 4x^3 − 10x^2 + 9
*September 14, 2014*

**CHM**

suggest an alternative indicator for the standardization reaction. Explain the rationale behind your choice. Used 10 g of KHP
*September 14, 2014*

**Physics**

thank you so much!
*September 14, 2014*

**Physics**

A force of 20N is applied to a mass of 5kg resting on a rough horizontal surface. If the friction force is 5N, what is the acceleration of the mass?
*September 14, 2014*

**Chemistry**

would the answer be 18840cm3
*September 13, 2014*

**Chemistry**

A plumber installs a pipe that has a diameter of 10 cm and a length of 2.4m, Calcualte the volume of water(in cm3) that the pipe will hold. Express your answer to the correct number of significant digits. Note: The formula for the volume of a cylinder is V=Pi(r)2h, where r is ...
*September 13, 2014*

**Veterinarian assisted**

Ok thank you
*September 12, 2014*

**Veterinarian assisted**

Hello please help
*September 12, 2014*

**Veterinarian assisted **

1. In the __________, an animal patient's hair is clipped and its skin is scrubbed to prepare for surgery. A. hospital ward B. surgical suite C. treatment area D. grooming area 2. Supervision of the treatment area is usually the responsibility...
*September 12, 2014*

**physics**

An elephant walks east for a distance of 30 km, then walks north for a distance of 16 km and finally north east at 300 for 18 km. Find the magnitude of the elephant’s total displacement in kilometers. Please explain how I would do this problem? Do I add all of the numbers...
*September 12, 2014*

**college math**

if $110 is invested for one year at 13% simple interest, how much interest is earned?
*September 10, 2014*

**world geography**

Australian vegetation is dominated by various species of acacia and A. cacti. B. marsupials. C. ores. D. eucalyptus. Student Answer: B Answer: Incorrect Reference: 10. According to the World Health Organization (WHO), AIDS is listed as the _______ main cause of global deaths...
*September 8, 2014*

**Business**

It's a total of 55 students majoring in History. What is the proportion of MBA students majoring in history. Compute to 95% confidence interval of the proportion of 200 students.
*September 7, 2014*

**Physics**

An object starts from rest an undergoes a constant acceleration in the positive x direction. After some time it covers a displacement of 37 meters in the positive x direction achieving some final velocity. If the object started from rest with double the original acceleration (...
*September 3, 2014*

**physics**

A Bulldog is already moving when we first see it. It waddles -57 meters reaching a final velocity of -28 m/s after accelerating at -4 m/s2. WHAT WAS THE DOG'S INITIAL VELOCITY? Every time I try to use v^2= V0+2a(delta x) I end up getting a very big value. Could you help me...
*August 30, 2014*

**Statistics **

1. The average time it takes for a cellphone to reboot is 3 minutes with a standard deviation of 10 seconds. The average time it takes a computer to restart is 5 minutes with a standard deviation of 15 seconds. Both are normally distributed. Suppose that a cellphone and a ...
*August 27, 2014*

**world history**

During the Neolithic era, the most isolated part of the world was a)africa b)south asia c)europe d)the americas
*August 24, 2014*

**phi 208 ethical and moral reasoning**

Answer is associate ones honor with that of the group.
*August 21, 2014*

**physics**

Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision ...
*August 10, 2014*

**algebra**

solve the following systwm graphically. Be sure to check your solution. if the system has an infinite number of solutions, use set-builder notation to write no solution, state this. 4y=x+8, x=2/3y+2
*July 9, 2014*

**PHI 208**

Yes it's from that movie
*July 6, 2014*