Saturday

January 31, 2015

January 31, 2015

Total # Posts: 76,977

**Chemistry**

Hydrogen chloride gas can be prepared by the following reaction: 2NaCl(s) + H2SO4(aq) --> 2HCl(g) + Na2SO4(s) How many grams of HCl can be prepared from 2.00 mol H2SO4 and 2.56 mol NaCl?
*December 11, 2014*

**Chemistry**

1. Calculate the concentration of H3O+, HC2O4-1, and oxalate ion (C2O42-) in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 ´ 10-2, Ka2 = 6.1 ´ 10-5.]
*December 11, 2014*

**AP physics**

i need help
*December 11, 2014*

**Math**

Thank you so much for your help!
*December 11, 2014*

**Math **

Can you subtract two negative numbers and get a positive difference? What are some examples, if it's possible? Can you add two negative numbers and get a positive sum? (I fairly certain it's not possible, but I'm not sure how to explain why it's not...)
*December 11, 2014*

**nat**

An effective piece of document does the all following but a.records information in a systemic fashion b. Tells the story being evaluated. C. Identifies Action items and areas of strength think a
*December 11, 2014*

**math**

Javia ran 8 laps to run a total of amile on monday how many laps will she need to run Tuesday to run 3/8 of a mile
*December 11, 2014*

**h**

Evaluation is conducted for which of following purposes ? To determine an individual process toward learning goals b.to determine an individual teacher effective s in the classroom. C.to determine the quality and effectives of a program or process am think c
*December 11, 2014*

**h**

When you received the results of an evaluation of your classroom ,which of following should ask yourself first? A.what did the children do wrong? B.what did I do ineffective ? C.what does date mean? D.what changes can I make right away?
*December 11, 2014*

**Math**

8/8 - 5/8 = 3/8 not cranes 6/6 - 1/6 = 5/6 grasshoppers 3/8 x 5/6 = 15/48 or 5/16 are grasshoppers Same answer as above just done differently.
*December 11, 2014*

**Math**

Ned folded a set of oragami figures. Of this set, 5/8 are cranes and 1/6 of the remainder are frogs. The rest are grasshoppers. What fraction of the origami figures are grasshoppers?
*December 11, 2014*

**maths**

Q: Prove- 2/log_8a - 4/log_2a= 1/log_4a i tried dividing 1/log_4a by 2/log_4(8) - 1/log_4a by 4/log_4(2) to get log_4(8)/2.log_4a - log_4(2)/4.log_4a =log_4(8)/log_4a^2 - log_4(2)/log_4a^4 =1.5/log4a^2 - .5/log4a^4 =1/.... I don't know how to deal with the denominator or ...
*December 11, 2014*

**Math**

Thank you Ms.Sue
*December 11, 2014*

**Math**

I got 18.375 If its wrong can you please tell me your answer and how you solved it I first divided 146.5 by 4 and got 36.625 then I subtracted 55 from 36.625
*December 11, 2014*

**Math**

How much does the cart weigh? Jason was hauling concrete blocks in a cart. When he had one block in the cart, the total weight of the cart with the block was 55 pounds. When he had 4 blocks in the cart, the total weight of the cart and the blocks was 146.5 pounds. How much did...
*December 11, 2014*

**Math**

prove: 1/log(base36)a = 2/log(base6)a i made a common base and then multiplied both sides with log(base6)a to get 2=log(base6)a/log(base6^2)a but this is as far as i can figure.
*December 11, 2014*

**science**

A couple has just learned that their daughter has hemophilia. They already have a son who does not have the disease. What are the genotypes of the couple? Explain your reasoning.
*December 11, 2014*

**French**

What is the difference between vieille and vieil in pronunciation?
*December 11, 2014*

**Physics**

A 80.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1320 N. If the diver comes to rest 5.1 m below the water's surface, what is the total distance between the diving board and the diver's ...
*December 11, 2014*

**physics**

An 56.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 104 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*December 11, 2014*

**math**

A store sells small notebooks for $8 and large notebooks for $10. If you buy 6 notebooks and spend $56, how many of each size notebook did you buy? my answer: 7 small notebooks and 5 large notebooks is this right?
*December 11, 2014*

**Math**

Your fishing bobber oscillates up and down from the current in the river in a harmonic motion. The bobber moves a total of 5.0 inches from its high point to its low point then returns up to the high point every 5 seconds. Write an equation modeling the motion of the bobber at ...
*December 11, 2014*

**Math**

The function f(t)=37sin(pi/3 -5)+81 is used to represent the changes in temperature of a chemical compound used in a lab. What is the amplitude? I got 5, is this correct. I have the options of 81, 5, 6pi, 37, and 2
*December 11, 2014*

**Trig**

What is the period of f(x)=sin4x. I got pi/2 but on my answer list, it is not on there. a.4pi b.2pi c.pi d.1/2pi Which one would i choose?
*December 11, 2014*

**Math **

At the amusement park, you decide to ride the Ferris wheel, which has a maximum height of 50 meters and a diameter of 35 meters. It takes the wheel 13 minutes to make one revolution. Write the sinusoidal function, f(t), that models the height of your chair at any time, t I got...
*December 11, 2014*

**english**

When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects.
*December 11, 2014*

**Math**

What is the domain of this function f(x)=sin^-1 x?
*December 11, 2014*

**Economics**

where
*December 11, 2014*

**physics**

An 56.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 104 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy. J
*December 11, 2014*

**math**

the ratio of boys to girls in a club is 7:4, there are 21 fewer girls than boys , what is the total number of children in the club?
*December 11, 2014*

**cem**

Iron Bromide
*December 11, 2014*

**physics**

A child and sled with a combined mass of 45.0 kg slide down a frictionless hill that is 8.79 m high. If the sled starts from rest, what is its speed at the bottom of the hill? m/s
*December 11, 2014*

**french**

Hello. I have this bit of french homework. I've already some of it. Please help correct it and help me in the last few blanks. 15. Comme je suis en retard, nous _______ chez nous (restions, reste, restons). 25. Tous les samedis je _____________ des crépes. (Mangeais...
*December 11, 2014*

**physics**

A plane designed for vertical takeoff has a mass of 8.2 ✕ 103 kg. Find the net work done by all forces on the plane as it accelerates upward at 10.5 m/s2 through a distance of 25.4 m after starting from rest. J
*December 11, 2014*

**chemistry**

write an equation that describes the equilibrium present in a saturated solution of Cu3(PO4)2 someone please explain to me, thanks!
*December 11, 2014*

**chemistry**

A solution contains 0.20 M Cl- and 0.20 M SO4^2-. a) identify a cation that could be added to the solution to give a precipitate with only one of these anions. MY answer: Cu+ b) write the net ionic equation for the precipitation reaction in part a) MY answer: Cl^- + Cu^+ ==>...
*December 11, 2014*

**Mathematics**

Insert three arithmetic mean and solve the nth term of 1 and 2
*December 11, 2014*

**math 120**

A recent poll of a random sample of 400 students at a public 4-year college showed the average (mean) amount of time spent using email was 49 minutes per day with a standard deviation of 44 minutes. a. find a 95% confidence interval fot the population mean
*December 11, 2014*

**algebra**

A square flag has a width of 21/2 feet find the perimeter
*December 10, 2014*

**physic**

7.38 kgm/s
*December 10, 2014*

**English help**

Would be after hot?
*December 10, 2014*

**English help**

Would the first one be after Morrison after Kristin and Hannah? Would the second one be after president? Would the third one be after tiring? Would the forth be after indeed? Would the fifth one be after me? Would the sixth one be after opinion?
*December 10, 2014*

**English help**

Where would I add commas in these sentences? 1. My favorite authors are Toni Morrison Kristin Hannah and William Shakespeare. 2. Some people think Benjamin Franklin is a former president but he is not. 3. The new student had a tiring hectic day. 4. Indeed true happiness does ...
*December 10, 2014*

**English check**

Which is correct? For this section, choose the answer choice that represents the correctly punctuated sentence. 1. A. The tall, dark, and handsome man was actually a con artist, and he fooled his friends for years. B. The tall, dark, and handsome man was actually a con artist ...
*December 10, 2014*

**Algebra2**

is the answer 192
*December 10, 2014*

**Urgent chemistry help**

is there anything unusual about how the first elements are named when naming the compound? Is there anything unusual about how the second element is named when naming the compound? Why are the elements in the binary compounds combined in different ratios ( as shown by the ...
*December 10, 2014*

**social studies**

what is the answe?R>
*December 10, 2014*

**social studies**

what is the answer?
*December 10, 2014*

**social studies**

@ms sue
*December 10, 2014*

**social studies**

What was the primary reason that new Christian denominations sprang up in Georgia following the war? The new government did not endorse any one specific religion The slaves’ religions were adopted by early Americans. The Georgia constitution made provisions for up to 13 ...
*December 10, 2014*

**Math**

Caroline runs 3 1/2 miles in 22 1/4 minutes how many miles does she run per minute?
*December 10, 2014*

**math**

thanks
*December 10, 2014*

**math**

A rectangular closet has a perimeter of 10 feet. If the width of the closet is 3 feet, what is the length of the closet?
*December 10, 2014*

**Diagram sentence**

Jason had a birthday party at his favorite Mexican resturant.
*December 10, 2014*

**Diagram sentence**

Sandy's throw to first base was short
*December 10, 2014*

**ratios**

A collector has 120 movie posters and 100 band posters. She wants to sell 24 movie posters but still have her poster c Collection maintain the same ratio of 120:100. If she sells 24 movie posters, how many band posters should she sell? OK
*December 10, 2014*

**science**

how much force is used when a 3.00 km object is moved by 51.0 kj of work?
*December 10, 2014*

**social studies**

are you sure?
*December 10, 2014*

**social studies**

why did post revolutinary americans value education? a college degree needed to get a job. they wanted to understand the world. they loved learning and wanted to understand the world. they believed educated citizens were needed to elect leaders for the new country.
*December 10, 2014*

**social studies**

@writEACHER
*December 10, 2014*

**social studies**

it is on the religion in georgia topic!
*December 10, 2014*

**social studies**

what was the primary reason that new christian denominations sprang up in goergia following the war? the new government did not endorse any one specific religion. the slaves' religions were adopted by early americans the goergia constitution made provisions for up to 13 ...
*December 10, 2014*

**physics**

flow rate = Q = pi r^2 v = amount per second that flows through the pipe so Q = pi (.563)^2 (13.5) if no oil has been added or subtracted or compressed then Q is the same everywhere so pi (D^2/4) (5.65) = Q
*December 10, 2014*

**social studies**

so the answer is cotton not tobaccoo?
*December 10, 2014*

**social studies**

i was just asking a questions?
*December 10, 2014*

**social studies**

@writEacher
*December 10, 2014*

**social studies**

i thought it is tobacco?
*December 10, 2014*

**social studies**

revolutinary georgia
*December 10, 2014*

**social studies**

now i think it is cotton? georgia development after the war
*December 10, 2014*

**social studies**

is it cotton?
*December 10, 2014*

**social studies**

which of the following became the most popular cash crop in georgia? corn cotton rice tobacco
*December 10, 2014*

**Calculus**

first = x^(3/5) second = (4-x) derivative = first derivative of second + second derivative of first first derivative of second = x^(3/5)*-1 second derivative of first = (4-x)[ (3/5){x^-(2/5)} = (1/5)(12 -3x)x^-(2/5) so -x^(3/5) + (1/5)(12 -3x)x^-(2/5) but x^(3/5) = x^(-2/5)x^(...
*December 10, 2014*

**ratios**

A collector has 120 movie posters and 100 band posters. She wants to sell 24 movie posters but still have her poster c Collection maintain the same ratio of 120:100. If she sells 24 movie posters, how many band posters should she sell? OK
*December 10, 2014*

**Math**

Can a triangle have side lengths 2, 3, and 5?
*December 10, 2014*

**Pre-Calc/Trig...**

oh okay, thanks!
*December 10, 2014*

**Pre-Calc/Trig...**

what is In e^4.3 equivalent to? How?
*December 10, 2014*

**statistic math**

the local weatherman has been accurate (successful) in his forecast 80% of the time. find probability that he is accurate exactly 3 of the next 5 days. helppp
*December 10, 2014*

**physics**

A 145-g baseball travels at 35 m/s toward a baseball player's bat (the bat is the object of reference) and rebounds in the opposite direction at 40 m/s
*December 10, 2014*

**College Algebra**

r/12 = .06/12 = .005 1+r/12 = 1.005 A = 100 (1.005) [ 1.005^12n -1]/.005 200,000 = 20,000 (1.005)[ 1.005^12n -1] 2000 = [ 1.005^12n -1] 2001 = 1.005^12n log 2001 = 12 n log 1.005 12 n = 1524.08 n = 127 years check my arithmetic !
*December 10, 2014*

**math**

3x = 42 x = 14 2x = 28
*December 10, 2014*

**math**

six pieces per yard for eight yards = 48
*December 10, 2014*

**world geography **

Which czars were given the credit of uniting the slavic territories?
*December 10, 2014*

**Ap calc**

At a football game, at the instant the ball goes into play, a player at the line of scrimmage begins running along the edge of the field at a rate of 25 ft/sec. The quarterback receives the ball and is forced into position 30 feet across the field from the boundary line along ...
*December 10, 2014*

**language arts**

thanks Michael!
*December 10, 2014*

**language arts**

Thanks Michael! you too! Let me know what questions you have sand if you think you know my question
*December 10, 2014*

**language arts**

Thank you! does anybody else have an idea?
*December 10, 2014*

**language arts**

Which of the following passages from the text best supports the idea that Johnny Tremain may be changing? A. He didn't really want to follow any trade but his own. He looked on soap-boilers, leather dresses, rope makers and such B. "I'll come back alright- but not...
*December 10, 2014*

**math**

Ivan is saving money to buy a computer with. He started with $225 in his savings account and the first week he added $75, the second week he added $200, the third week he unfortunately had to take out $50 and the fourth week he added $125. How much more money does he need to ...
*December 10, 2014*

**physics**

A 2 kg lab cart is sliding across across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.0 seconds and in what direction? Update 2: what i don't...
*December 10, 2014*

**math**

How do you factor 40y^2+y-6? Explain the steps please? I am very confused!
*December 9, 2014*

**history**

which of the following would not be considered an institution? A families B sports clubs C organized religion D civilizations is it d?
*December 9, 2014*

**language arts**

nobody awnserd
*December 9, 2014*

**language arts**

which of the following statements from Johnny Tremain most accurately describes Mr. Latham and his daughter-in law Mrs. Latham? A. Mr. Lapham is kindly and pious; Mrs. Lapham is pragmatic and determined B. Mr. Laphan is concerned about money; Mrs. Latham is concerned about ...
*December 9, 2014*

**general chemistry **

Copper crystallizes in a face-centered cubic unit cell with an edge length of 362 pm. What is the radius of a Cu atom in pm?
*December 9, 2014*

**Math**

what two numbers add to -19 and multiply to -42 (factoring?!) 14c^2-19c-3
*December 9, 2014*

**general chemistry**

it says it's incorrect
*December 9, 2014*

**general chemistry **

Copper crystallizes in a face-centered cubic unit cell with an edge length of 362 pm. What is the radius of a Cu atom in pm? What equation do you use?
*December 9, 2014*

**general chemistry **

Methanol has a ΔHvap = 35.3 kJ/mol CH3OH. Calculate the change in heat, q, when 50.0 g methanol condenses? Caution! Is q + or -?
*December 9, 2014*

**Math**

Thank you very much. :)
*December 9, 2014*

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