Friday

May 22, 2015

May 22, 2015

Total # Posts: 497

**Chemistry**

what is the freezing point of an aqueous solution that boils at 102.1 C? Kf=1.86 Kb=0.512 102.1-100.0=2.1 2.1/0.512=4.10 4.10*1.86=7.62 C 7.62 C Is this correct?
*May 22, 2015*

**Calculus **

What is the derivative of tan(1-x)^(1/2)?
*May 6, 2015*

**Language Arts**

These are all wrong! The answers are not correct.
*April 23, 2015*

**Math**

Isn't 51 divisible by 3 and 17?
*April 22, 2015*

**Math**

Ohhhh! Thank you!
*April 22, 2015*

**Math**

I don't really understand that, doesn't b have a five in there?
*April 22, 2015*

**Math**

Without using a calculator, decide which of these numbers divide into 2^5 * 3^9 * 7^2 * 13^5 8 17^4 * 19 with no remainder. Explain how you know. a) 2^4 * 3^8 * 7^2 * 13^4 * 17^4 * b) 2^5 * 3^2 * 5 * 7^2* 17 c) 2^4 * 13^4 * 17^4 * 19^4 d) 2^2 * 3^5 * 7 * 13^3 * 17^2 * 19
*April 22, 2015*

**Life orientation**

Factors that could threaten or limit core functions of the media
*April 4, 2015*

**Math**

So, my teacher wants me to sketch the graph of a system of inequalities but I'm not sure how. Can someone help me? Thank you! 3x + 2y < 6 x > 0 y > 0
*March 12, 2015*

**AP Chem**

Do i use Ka or Kb?
*March 9, 2015*

**AP Chem**

What is the ph of a .05 L solution containing .075 mol NH3 and 6.80 g of NH4+ when .025 L of 2 M is added to it? Kb= 1.8 x10^-5
*March 9, 2015*

**AP CHEM LAB**

How much .25 molar NAOH would you need to add to 50 mL of 2.85 molar HCl to reach the equivalence point?
*March 3, 2015*

**Chemistry Equilibrium**

1.15 g oh h2O (density 1.00 g/ml) is introduced into an empty 1.00 L container. The seled container is heated to 412 K and .150 moles of O2 (g) is present at equilibrium. A. Wrte the equilibrium expression for the reaction above. B. Calculate the equilibrium concentration (in ...
*February 26, 2015*

**Science**

A boy and girl sit on a seesaw of length 4m, balanced at its center. The girl sits at the far end and has a mass of 50kg. The boy is twice as heavy as the girl, and therefore sits midway between his end and the center. Then the girl is given a bag of oranges weighing 5kg, and ...
*February 23, 2015*

**PLEASE CHEM**

sorry this is in basic solution
*February 14, 2015*

**PLEASE CHEM**

wouldnt h2o be on the other side because you orignally have 2h20 on the products and one h20 in the reactants so cancelling them out would make one h20 on the products side
*February 14, 2015*

**PLEASE CHEM**

balance the redox reaction NO2^- + Ag^+ = NO3^- + Ag
*February 14, 2015*

**algebra**

Translate into algebraic exxpression one third of difference betwen 6 andp is added to 8
*February 13, 2015*

**Algebra**

translate the give fhrase into algebraic expresion 7 less than sum of 3 and x divided by 5
*February 13, 2015*

**Math**

Directions: Find all solutions of the equation in the interval (0, 2pi) sin x/2=1-cosx
*February 3, 2015*

**chemistry**

C6H12 = 9O2 --> 6CO2 = 6H2O + 3,690 kJ *Personally Balanced* What quantity of heat is produced if 32g of cyclohexane react with 95 L of oxygen at STP? *My work so far is below* 95L*(1 mol O2/22.4L) = 4.2 mol O2 What would be the next motive?
*January 21, 2015*

**social studies**

i think idk
*December 3, 2014*

**biology**

which is true about the inside of a cell? -the inside of an animal cell contains structures that carry out specific jobs for the cell, but no water or molecules dissolved in water -the inside of an animal cell contains water, molecules dissolved in the water and structures ...
*December 1, 2014*

**math**

how i make triangular prism,the dimensions are 6 unit base and 6 unit height,but the entire prism has height of 15 unit
*November 25, 2014*

**Math Help**

The number y of daily fee golf facilities in the United States from 1995 to 2003 can be represented by the following model where t represents the year with t = 5 corresponding to 1995. y=4381+1883.6lnt 5=t=13 During which year did the number of daily fee golf facilities reach ...
*November 12, 2014*

**chemistry**

The reaction between sodium hydroxide and hydrobromic acid is represented in the equation below: OH- + H+ -> H2O A 62.5 mL sample of 1.86 M NaOH at 22.5 deg Celsius was mixed with 62.5 mL sample of 1.86 M of HBr at 22.5 deg Celsius in a coffee cup calorimeter. The ...
*November 2, 2014*

**Organic Chemistry**

Calculate the partition coefficient of caffeine in water/methylene chloride from the following data: 10.3 g/100 mL for methylene chloride and 2.04 g/100 mL for water. Using the same data a student follows our procedure and extracts the caffeine using 3 extractions of 7 mL of ...
*October 31, 2014*

**Organic Chemistry**

In a very controlled experiment, a student is sure that 0.500 grams of caffeine is dissolved in 125 mL of water. The student extracts the caffeine using a single extraction of 21 mL of methylene chloride. How much caffeine is in the methylene chloride? How much remains in the ...
*October 31, 2014*

**Derivatives**

Could you perhaps do one of the ones on the bottom that are not in fraction form, cause I have a hard time doing the ones that have cos,sin,sec, and tan in them.
*October 22, 2014*

**Derivatives**

Oh okayyyyyyyy, I see it now, thanks
*October 22, 2014*

**Derivatives Help**

..I'm not sure I understand
*October 22, 2014*

**Derivatives **

Can you help me find the derivative of these problems...Every time I try doing these I don't get the right answer. All of these are fractions; (x)/(2+x)= (x^2+3)/(x^3-2)= (2π)/(x^2-x)= These are not fractions; (3x^3/2 tanx)= (3x^1/2 sinx)= (4secx tanx)= (x^2 cotx)= (x...
*October 22, 2014*

**english**

I did read it! The article was about people from south america are illegally coming to america by passing the border of mexico to texas.Then it talks about solutions of making people stop coming and mini stories of people who illegaly did it
*October 9, 2014*

**english**

please give me an example please
*October 9, 2014*

**english**

lets say a article talks about crossing the border of mexico illegally. Maybe i could say this reminds me about going to a country bout on a airplane and then i would have to explain why i think this
*October 9, 2014*

**english**

i still dont understand
*October 9, 2014*

**english**

what does it mean when the question is asking you ¨what was something that ¨stuck with you¨ during the reading of this article? explain." thanks
*October 9, 2014*

**Math**

Can someone tell me if I have this right? Thanks! Question: P varies directly as Q can be written as P = kQ. True Or False. My answer: True
*October 3, 2014*

**math**

24 by 15
*October 1, 2014*

**Physics I**

Ok thank you.
*September 21, 2014*

**Physics I**

Isn't gravity going upward positive and if it's downward then it would be negative? That's what my teacher told me but I'm pretty sure he said the answer was D too.
*September 21, 2014*

**Physics I**

A ball has been thrown upward. Which of the following is true while the ball is on the way up, after the ball has been released, assuming no air resistance? a. The acceleration is upward. b. The acceleration is zero. c. The ball's speed increases by 9.81 m/s each second. d...
*September 21, 2014*

**biology**

Please can i have a list of sone adaptive features of terrestrial plants. Please
*September 9, 2014*

**chemistry**

Please can i have a list of adaptive features of terrestrial plants. Please
*September 9, 2014*

**Identify the regular verb or verb phrase **

In the Middle Ages, students learned from priests and other church officials.
*July 24, 2014*

**PHYSİC**

A standard CD has a diameter of 12.0 cm, and a hole that is centered on the axis of symmetry and has a diameter of 1.50 cm. The CD’s thickness is 1.2 mm, and it's mass is 17 g. If a (very thin) pin extending through the hole of the CD suspends it in a vertical ...
*July 12, 2014*

**Physics**

A 1 kg hockey puck is sliding on the ice at 5m/s and stops on some dirt in 2 secs. I need to find the coefficient of kinetic friction. I found the acceleration being -2.5m/s^s (0-5m/s / 2s) Idk what to do next pleaseeee help
*June 1, 2014*

**Chemistry**

No other equations are provided however the question goes on to ask if enough N2O4(g) is placed in a container to achieve 1.00 atm of pressure at this temperature, predict what the final pressures of each of the gasses will be.
*May 18, 2014*

**Chemistry**

Please help! I can't seem to set this up right At any given temperature 2NO(g) + O2(g) <-> 2NO2 kp=1X10^4 2NO2(g) <-> N2O4 kp=1X10^-1 Find the kp 2NO(g) < -> O2(g) + N2(g) kp=?
*May 18, 2014*

**chemistry**

a 2.00 L ballon at 25 degrees celcius and 745mmHg floats on an altitude where the temperature is 10 degrees celcius and the air pressure is 700mmHg. what is the new volume othe balloon
*May 8, 2014*

**life orientation**

I don't knw
*April 27, 2014*

**math**

input:0;1;2;3 outpu2:4;2;0;-2 wht is the formula#stressed:|
*April 21, 2014*

**math**

the equation is y=2exponent(x)+2 determine the input value if y=34
*April 21, 2014*

**trig/ vectors**

Points C and D are directly across from each other on opposite banks of a river. A boat travels across the river directly from point c to point d at a speed of 12 mph. If the current of the river has a speed of 4 mph, at what angle, and speed, must the captain head to travel ...
*April 13, 2014*

**fitness and health**

I would say carrots
*April 9, 2014*

**Statistics**

1,037 it is simple math.
*April 9, 2014*

**SCIENCE PLEASE HELP ME!!!!!!!! ASAP PLEASE PLEASE**

it is A stupid
*April 9, 2014*

**science(check answers)**

anonymous is correct
*March 31, 2014*

**Math**

Find an Equation for the least squares line then use it to find the missing value. (400, 50) (500, 65) (500, 70) (600, 80) (700, 85) (800, 95) (550, Y) Interpolate I think the least squares line is y= .10538X+ 12.6923 Could someone verify and please instruct me how to complete...
*March 20, 2014*

**Math: Statistics Least squares line**

Find an equation of the least squares line, then use it to complete the table. X- 111 169 230 287 335 ? Y- 2 3 4 5 6 7 Extrapolation I missed the lesson on this and as far as I can tell I think the least squares line is y= .01764x+ .oo693 If anyone could verify my line and and...
*March 19, 2014*

**math **

a 5% acid solution is mixed with a 9% acid solution. How many ounces of each solution are needed to obtain 40 ounces of a 6% solution?
*February 27, 2014*

**algebra**

xdss
*February 19, 2014*

**Science**

Hey can you help me with those! :P
*February 6, 2014*

**physics**

An ideal gas has a pressure of 2.5 atm, a volume of 1.0 L at a temperature of 30.°C. How many molecules are there in the gas? 6.1 × 1023 6.0 × 1022 2.4 × 1022 2.3 × 1023
*February 4, 2014*

**Physics**

The molecular mass of oxygen molecules is 32, and the molecular mass of nitrogen molecules is 28. If these two gases are at the same temperature, the ratio of nitrogen's r m s speed to that of oxygen is: (8)1/2:(7)1/2 8:7 (7)1/2:(8)1/2 7:8
*February 4, 2014*

**Physics**

sadadfa
*February 3, 2014*

**Math**

Estimate the total number of years of service of 200 factory workers based on a sample size of n=5 where the years of service reported are 12, 8, 20, 5, 12
*February 3, 2014*

**Math**

In one hour, a factory packaged 150 boxes of light bulbs. Estimate the total number of defective light bulbs packaged that hour based on a sample of 8 boxes containing the following numbers of defective bulbs: 5, 3, 5, 1, 2, 9, 4, 3
*February 3, 2014*

**Algebra 1A **

What are the four steps for solving a problem?
*January 29, 2014*

**trig**

Wow I feel stupid. Lol thanks tho!
*January 16, 2014*

**trig**

I did but I got lost :(
*January 16, 2014*

**trig**

And show work please!
*January 16, 2014*

**trig**

simplify (1-cot^2x sec^2x) / ( cot^2x)
*January 16, 2014*

**trig**

simplify (1-cot^2x sec^2x) / ( cot^2x)
*January 16, 2014*

**econ/business**

Last month, Sue, of Sue's Sandwiches, sold $3,000 worth of product (sandwiches and sodas) from her sidewalk cart to 300 customers. She spent $600 on the sandwich ingredients and buying the sodas wholesale. Her monthly costs are the following: Utilities = $60, Salary = $1,...
*November 20, 2013*

**chemistry**

suppose that 100g h20 is added to calorimeter intially at 20C containing 100g of h20 at 20C. If calorimeter perfectly insulates, what would be the final temperature of the water?
*November 18, 2013*

**College**

Do the Counselors, at the Colleges, suppose to give their students good advises, of how to continues, and to further there Education, and to supervised how to UPGRADE their Continuing Education? YES? OR NO? WHY?
*October 18, 2013*

**Health**

Is your health is important to you? YES or NO? WHY? Give me (three) examples!
*October 18, 2013*

**Physical Education**

In the years of Physical Education, Does it helps STESS? YES or NO? WHY?
*October 18, 2013*

**Art**

Why is it very important, to do Creative ART, in school, Colleges, and ETC.?
*October 18, 2013*

**Spanish**

Is Spanish a Unique Language to learn and to Study? Why?
*October 18, 2013*

**Leadership**

What are some Leadership Conferences, that are in the State of Georgia?
*October 18, 2013*

**The Office**

Why is it very important to manage Ergonomic Factors?
*October 18, 2013*

**Psychology**

Is Psychology is very important in life? Yes or No? Why?
*October 18, 2013*

**Physical Science**

I will have to come back owm this answer. This will take a little of time to fine the correct answer.
*October 15, 2013*

**Chemistry**

What is the mass in grams of 16.46 mL of acetone?
*October 15, 2013*

**Science**

Hydrogen
*October 15, 2013*

**Pyschology**

Learning and behavior. Evaluates thinking.which includes observations,,and testing.
*October 14, 2013*

**Pyschology**

Problem Solving, planning and organization, fine motor skills, visual spatial skills, and academic skills. This is an examination of your behavior and emtions.
*October 14, 2013*

**Journey Career**

For a exploratory interview I need some help... What are all of the didn't kinds of pathways for a Cosmetologist? What is a career field? What is a career cluster?
*October 4, 2013*

**Physics **

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp. negligible friction ...
*October 1, 2013*

**Physics **

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp. negligible friction ...
*October 1, 2013*

**Physics 12**

A flag of mass 2.5 kg is supported by a single rope as show in figure 13. a strong horizontal wind exerts a force of 12 N on the flag. Calculate the tension in the rope and the angel, the rope makes with the horizontal. here is the figure: _________________________...
*October 1, 2013*

**(ASAP)**

how can a relationship between water depth and time to ascend to the water's surface be a function? Explain how the two variables are related. Answer this Question
*September 10, 2013*

**Math**

how can a relationship between water deptg and time to ascend to the waters surface be a function? Explain how the two variables are related.
*September 10, 2013*

**SAT math**

If a-b<0, which of the following expressions must be true? A) -ab>a B) b+5>a-5 C) b^4>a^4 D) b^3>a^2 E) 2a>b
*August 13, 2013*

**science**

do your on homework or ask the teacher ediot
*August 7, 2013*

**Math**

a+9b=19 ; a=19-9b--->eq 1 a+2b=-2 --->eq 2 subs eq1 into eq 2 19-9b+2b=-2 19-7b=-2 19+2=7b 21/7=b b=3 subs b=3 into eq 1 a=19-9(3) a=19-27 a=-8
*July 28, 2013*