Tuesday

October 6, 2015
Total # Posts: 247

**chemistry**

E=hv h=6.6E-34Js E=5.1E-22k E/h=v 5.1E-22k/6.6E-34Js =
*August 28, 2012*

**Chemistry**

What would be the final concentration if 175mL of a 0.45M solution of sodium sulfite Na2SO3 are added to 650mL of water? Please reply with the steps on how to do this question so I can learn. I can't find examples or anything related in my textbooks and I take it via ...
*June 14, 2012*

**Chemistry**

If 125mL of a 1.10 NaCl solution is mixed with 105mL of a 0.850M CaCl2 solution but NO reaction takes place, calculate the final concentration of each of the ions in the final solution. Please reply with the steps on how to do this question so I can learn. I can't find ...
*June 14, 2012*

**Chemistry**

A 15.0mL solution of H2SO3 is neutralized by 12.0mL of a standardized 1.00M NaOH solution. What is the concentration of the H2SO3 solution? Please reply with the steps on how to do this question so I can learn. I can't find examples or anything related in my textbooks and ...
*June 14, 2012*

**chemistryy**

The reaction between 34.0 g of NH3 and excess oxygen gas produces 45.9 g of NO gas and some water. Determine the percent yield.
*May 18, 2012*

**chemistryy**

The reaction between 34.0 g of NH3 and excess oxygen gas produces 45.9 g of NO gas and some water. Determine the percent yield.
*May 18, 2012*

**english 1 honors**

In the writer by richard wilbur what does the speaker compare his daughter to?
*May 7, 2012*

**Geometry **

If AB= 9 centimeters and BC= 12 what does Ac equal ? and it is a right triangle .
*April 16, 2012*

**physics**

C. now answer my question please !
*April 16, 2012*

**general chem**

A certain monoprotic weak acid with Ka = 0.49 can be used in various industrial processes. (a) What is the [H+] for a 0.191 M aqueous solution of this acid and (b) what is its pH? Round the [H+] to three significant figures and the pH to two places past the decimal and do NOT ...
*March 25, 2012*

**general chem**

A certain monoprotic weak acid with Ka = 0.49 can be used in various industrial processes. (a) What is the [H+] for a 0.191 M aqueous solution of this acid and (b) what is its pH? Round the [H+] to three significant figures and the pH to two places past the decimal and do NOT ...
*March 25, 2012*

**math**

40% of the 25 students in the class are boys. Write 40% as a fraction? Then find the ratio of girls to boys
*March 8, 2012*

**algebra**

a landscaper uses square tiles to make garden paths the ends of the paths are always 2 tiles wide, and the center portions of the paths are 3 tiles wide. what eqation gives the total number y of tiles needed to make a path with a length of x tiles. the landscaper has 100 tiles...
*February 26, 2012*

**Economics**

110
*February 22, 2012*

**statistics**

Among coffee drinkers, men drink a mean of 2.8 cups per day with a standard deviation of 0.5 cups. Assume the number of drinking per day follows a normal distribution. What proportion drink 3 cups per day or more?
*February 20, 2012*

**algebra, please help**

(y^2 + 10y + 25)/(y^2 - 9) * (y^2 + 3y)/(y + 5) (y+5)(y+5)/(y+3)(y-3) * y(y+3)/(y+5) (y+5)/(y-3) * y/1 y(y+5)/(y-3) or y^2+5y/y-3
*December 7, 2011*

**physics**

A car is safely negotiating an unbanked circular turn at a speed of 17.2 m/s. The maximum static frictional force acts on the tires. Suddenly a wet patch in the road reduces the maximum static frictional force by a factor of three. If the car is to continue safely around the ...
*November 22, 2011*

**Math-Algebra 2**

Ace Rent a Car charges a flat fee of $15 and $0.25 a mile for their cars. Acme Rent a Car charges a flat fee of $30 and $0.17 a mile for their cars. Use the following model to find out after how many miles Ace Rent a Car becomes more expensive than Acme Rent a Car. c= 15+0.25m...
*October 27, 2011*

**math**

Lcm of 2 and 3
*October 19, 2011*

**physics**

A. m1a1=T-m1g and m2a2=T-m2g are your two equations, substitute and add and you get this --> T= (2xm1xm2)/(m1+m2) all multiplied by 9.8 (g). T= (2(3.0)(7.0))/(3+7) = 4.2(9.8) = 41.16 N B. Then just plug it in to one of your original equations. m1a1 = T-m1g (3.0)a = (41.16N...
*October 14, 2011*

**Algebra**

The sum of two consecutive odd integers is 56. A. Define a variable for the smaller integer. B. What must you add to an odd integer to get the next greater odd integer? C. Write an expression for the second integer. D. Write and solve an equation to find the two odd integers.
*October 14, 2011*

**chemistry**

20.0 g of CH3OH is frozen solid at -98.0 degrees C. What is the total energy required to melt it, warm the liquid to its boiling point, and then just vaporize it?
*October 6, 2011*

**math **

Fraction simplest 12 over 210
*September 25, 2011*

**geometry**

Given that ABC 53-x with a leg of 28 ~ DEC, x+3 with a leg of 4 find the value of x. If necessary, round your answer to two decimal places.
*May 17, 2011*

**science**

list 10 examples of slow changes over a long time. list 10 examples of quick changes over a short time.
*April 13, 2011*

**ALEGBRA1**

the point (-1,6) would be in quadrant 2.
*April 13, 2011*

**math**

George has a large circular table with a circumference of 18 feet. What is the approximate area of the table?
*April 12, 2011*

**statistics**

Assume that you own a small factory. A critical piece of machinery in your factory will need to be replacedin 180 days. If the machinery does not show up on time, you will need to shut down until it arrives. This might cause you to permanately lose customers.When you order the...
*March 29, 2011*

**algebra (quadratic formula0**

or the period 1990-2003, the amount of biscuits, pastas, and noodles y (in thousands of metric tons)imported into the united states ca be modeled by the function y=1.36(xsquared)+ 27.8x+304 where x is the number of year since 1990. a.write and solve an equation that you can ...
*March 22, 2011*

**algebra (parabolas)**

you throw a wad of used paper towards a wastebasket from a height of about 1.3 feet above the floor with an initial vertical velocity of 3 feet per second. a. write and graph a function that models the height h (in feet) of the paper t seconds after it is thrown b. if you miss...
*March 20, 2011*

**algebra (parabolas)**

find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. 1. y=-xsquared+9 2. y=-2xsquared=7x-21
*March 20, 2011*

**algebra (parabolas)**

find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. y=3*xsquared+6x-2
*March 20, 2011*

**algebra (parabolas)**

tell whether the graph opens upward or downward. then find the axis of symmetry and vertex of the graph of the function 1. y=xsquared-5 2. y=-2*xsquared+6x+7
*March 20, 2011*

**social studies**

never mind. a friend helped me.
*March 16, 2011*

**social studies**

my teachers do not want us on Wikipedia.
*March 16, 2011*

**social studies**

1. define Allah 2. the word Muslim means...? 3.JIHAD means to strive... what are Muslims striving for? 4. list and describe 5 contributions of Muslims to our lives today
*March 16, 2011*

**polynomials**

6. Simplify: 4x2yz2 2z Select answer A 2x2y2z2 Select answer B 2x2z Select answer C 2x2yz2 Select answer D 2x2y Select answer E 2x2yz
*February 28, 2011*

**social studies**

name 2 ways that it might affect our society if no one volunteered to help others.
*February 28, 2011*

**algebra**

The value of a certain two-digit number is eight times he sum of its digits. if the digits of the number are reversed the result is 45 less than the original number. find the original number. **please show both equations and work... thanks =)
*February 28, 2011*

**6th grade science**

What is the 47th element in the periodic table?
*February 22, 2011*

**algebra**

please write and equation, show your work, and find the answer: 1.a certain two-digit number has a value that is seven more than six times the sum of its digits. the tens digit is 3 more than the units digit. find the number 2.In Colorado Creek, Darrell can row 24km downstream...
*February 16, 2011*

**chem.**

physical or chemical property sodium metal fohrmhs an oxide when heated with oxygen?
*February 16, 2011*

**Chemistry**

calculate the enthalpy change in delta H foor heating 250 grams of liquid water from 0 degrees celcius to 100 degrees celcius.
*February 11, 2011*

**earth**

I DONT NO
*February 2, 2011*

**algebra**

ok thanks!
*January 31, 2011*

**algebra**

okaaaay im starting to get it. so what would the second equation be again? and can you please explain it? =) thanks!
*January 31, 2011*

**algebra**

ya i did today. but i dont understand how you got 24 as the y-intercept
*January 31, 2011*

**algebra**

i do not think that is what my teacher was asking for.
*January 31, 2011*

**algebra**

you will be making hanging flower baskets. the plants you have picked out are blooming annuals and non-blooming annuals. the blooming annuals cost $3.20 each and the non-blooming annuals cost $1.50 each. you bought a total of 24 plants for $49.60. write a linear system of ...
*January 31, 2011*

**science**

how is water purified in the water cycle? why is the sun so important in the water cycle? what role does evaporation play in the water cycle? thanks!!!! :)
*January 26, 2011*

**language arts**

there are three words to use to fill in each blank... the words are 1. automatic 2. tenant 3.volley here are the sentences: 1. OCCUPANT is to _________ as CHILDISH is to JUVENILE 2. BY HAND is to _________ as PALE is to BRIGHT 3. BARRAGE is to _________ as TOUGH it to ...
*January 25, 2011*

**language arts**

i understand the relationships and i understand they are analogies and how they work. i already checked the dictionary website and i still need help.
*January 24, 2011*

**language arts**

there are three words to use to fill in each blank... the words are 1. automatic 2. tenant 3.volley here are the sentences: 1. OCCUPANT is to _________ as CHILDISH is to JUVENILE 2. BY HAND is to _________ as PALE is to BRIGHT 3. BARRAGE is to _________ as TOUGH it to ...
*January 24, 2011*

**MATH**

-402
*January 16, 2011*

**algebra**

i think the answer is (x-8)<14 the parentheses stand for the absolute value sign
*January 14, 2011*

**algebra**

write the verbal sentence as an inequality and solve the inequality. (this has to do with absolute value inequalities) the distance between x and 8 is less than 14
*January 14, 2011*

**language arts**

thanks sooooooo much!
*January 14, 2011*

**language arts**

i cant find the definition of the word cautious. i tried that dictionary website and it didn't help. please help!
*January 14, 2011*

**math**

um i got n=3
*January 12, 2011*

**algebra**

Please
*January 12, 2011*

**algebra**

the new school has exactly 1000 lockers and 1000 students. on the first day of school, the students meet outside the building and agree on the following plan: the first student will enter the school and open all of the lockers. the second student will then enter the school and...
*January 12, 2011*

**algebra**

ya and it takes me to this website where i need a membership to access the info
*January 12, 2011*

**algebra**

the new school has exactly 1000 lockers and 1000 students. on the first day of school, the students meet outside the building and agree on the following plan: the first student will enter the school and open all of the lockers. the second student will then enter the school and...
*January 12, 2011*

**science**

i don't understand how you got the answer to number 2. is matter the composition?
*January 10, 2011*

**science**

here are some science questions I've been trying to do for over an hour and i just cant figure them out! 1.how does a fan convert energy? 2.what happens to matter during both a physical and chemical change? 3.give an example of a simple closed system 4. in a fire, why does...
*January 10, 2011*

**math**

the odds that it wont happen are 7/7-1/7=6/7. so your answer is 6/7. I'm not sure what the ratio would be... perhaps 6:7 i am not a tutor
*January 10, 2011*

**algebra (inequalities)**

your club is in charge of making pins that students can buy to show their school spirit for the upcoming football game. you have made 225 pins so far, and you only have 120 minutes left to make the rest of the pins. you need to make at least 400 pins. a. write an inequality ...
*January 9, 2011*

**algebra (inequalities)**

a weaver spends $420 on supplies to make wall hangings and plans to sell the wall hangings for $80 each. a. write an inequality that gives the possible numbers of (w) wall hangings the weaver needs to sell in order for the profit to be positive b. what are the possible numbers...
*January 9, 2011*

**language arts**

i have been looking EVERYWHERE for a correct definition of the words retaliatory and immune... please help!!!!
*January 9, 2011*

**Physical Science**

group 4 because they are the group that nothing is happening to. they are what the scientists will compare the results back to. hope that helps!
*January 7, 2011*

**algebra**

im sorry, i do not understand.
*January 7, 2011*

**algebra**

solve the inequality, if possible. -2x-<-2x-1 2n>n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.
*January 7, 2011*

**algebra**

and are you trying to find the zero of the function? if you are then: f(x)=10/4-7x 0=10/4-7x -10/4=7x -5/14 is your answer.
*January 7, 2011*

**algebra**

do you mean f(x)?
*January 7, 2011*

**algebra (inequalities)**

solve the inequality, if possible. -2x-<-2x-1 2n>n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.
*January 7, 2011*

**algebra**

if it is then: 9x-7y=-49 -7y=-9x-49 divide everything by 7 y=-1 7/25-49 hope that helps!
*January 7, 2011*

**algebra**

is this supposed to be a slope-intercept form question?
*January 7, 2011*

**Math 3**

convert to common denominators then add. 6/11 would become 78/143 and 2/13 becomes 22/143. add then reduce(if possible)
*January 6, 2011*

**Math**

1. you would do length*width*height 2. 3 feet equal 1 yard so do 3 1/2*3 3. 24 hrs are in one day so you divide 624 by 24
*January 6, 2011*

**science**

thanks a bunch!
*January 6, 2011*

**science**

i need help finding some household items that have some of the following forms of energy: radiant, chemical, nuclear, electrical, acoustic, thermal, and mechanical. so far i have the TV as electrical, acoustic, and mechanical; the stove top as electrical, caustic, mechanical, ...
*January 6, 2011*

**arithmetic**

you would divide each side by 7/8 to get the variable alone. once you solve 3 divided by 7/8, you should get what h is.
*January 6, 2011*

**Algebra**

point: (4,5) slope: -2 y=-2x+b 5=-2(4)+b 5=-8+b -3=b your final answer is y=-2x-3
*January 6, 2011*

**Social Studies**

Ok. Maybe states. That makes more sense.
*January 4, 2011*

**Social Studies**

I need to list 10 countries of the North. I thought-USA, Canada, Greenland, etc but can't come up with 10. For South-South America, Chile,etc. Not sure if that"s correct.
*January 4, 2011*

**Social Studies**

I need to list 10 countries in the North and 10 countries in the South during slavery times. Can't find anything. Please help. Thank you.
*January 4, 2011*

**unscramble spanish words**

rrbuaio
*January 2, 2011*

**AP Calculus**

A line is perpendicular to 2x+y-7=0 and passes through (4,6). Find the y coordinate of the point where x=-8
*December 16, 2010*

**Math**

in parralleloggran WXYX m/_Y = 65 What are the measurea of /_W , /_X, and /_Z in degrees?? /_= angle
*December 1, 2010*

**College Chemistry- Hess's Law**

-109.5
*October 22, 2010*

**Math**

Of the 43 U.S. presidents,15 were elected to serve two terms.What fraction of the U.S. president,in simplest form,was elected to serve two terms?
*October 12, 2010*

**chemistry**

What mass of protons would be required to just neutralize the charge of 4.4g of electrons?
*September 20, 2010*

**english**

thank u ms sue
*September 11, 2010*

**english**

people with stronger friendship networks feel like there is someone they could turn to what does that quote means please help meee
*September 11, 2010*

**art**

aaron Douglas first picture from the harlem of renaissance the name of the picture and date/time and material used and used for and symbolism please help meeee
*September 11, 2010*

**6th grade/math**

change .5 into a fraction
*September 10, 2010*

**science**

should i heat material in a closed container or vessel
*August 27, 2010*