# Posts by Lola

Total # Posts: 692

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 ...

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 ...

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 ...

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.

Derivatives
Oh okayyyyyyyy, I see it now, thanks

Derivatives Help
..I'm not sure I understand

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...

english
no

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

english

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

english
i still don't understand

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

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

math
24 by 15

Pre-Cal
2x

Physics I
Ok thank you.

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.

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...

algebra
3143

biology

chemistry

Math
if there are boys to girls a ratio of 7:3 and 200 more girls enrolled how many boys will be there.

Math
it is C

Identify the regular verb or verb phrase
In the Middle Ages, students learned from priests and other church officials.

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 ...

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

science
i need help

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.

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=?

c++
I have no idea. Can someone help me please

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

Math
17 games have won

life orientation
I don't knw

math
iriduhhwjcjezkhd JU DE AUD burthles sjeia eiajr r aij ir answer must be iriduhhwjcjezkhd JU DE burthles sjeia eiajr r aij ir

math
input:0;1;2;3 outpu2:4;2;0;-2 wht is the formula#stressed:|

math
the equation is y=2exponent(x)+2 determine the input value if y=34

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 ...

fitness and health
I would say carrots

Statistics
1,037 it is simple math.

it is A stupid

anonymous is correct

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...

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...

For connexus students ... These are the right answers! Melody S. is wrong 1. D 2. B 3. B 4. A 5. C Guarenteed you'll get a 5/5 100%. Thank me later <3

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?

Science
Hey can you help me with those! :P

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

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

Physics

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

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

Algebra 1A
What are the four steps for solving a problem?

math(CHECK ASNWERS)
Actually the answers are 1.c 2.c 3.d 4.a 5.c I got 5/5 100% correct trust me! Why would I lie? <3

math
Actually the answers are 1.c 2.c 3.d 4.a 5.c I got 5/5 100% correct trust me! Why would I lie? <3

trig
Wow I feel stupid. Lol thanks tho!

trig
I did but I got lost :(

trig

trig
simplify (1-cot^2x sec^2x) / ( cot^2x)

trig
simplify (1-cot^2x sec^2x) / ( cot^2x)

Science
thank you

SCIENCE HELP JUST 2 QUESTIONS!! PLZZ HELP! :)
1). The skeletal system, its made up of bones, ligaments and tendons. The skeletal system is what shapes the body and protects organs. It works the muscular system and helps the body move.

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,...

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?

7th grade accelerated math / pre algebra
dlcjnwepcwivnije2fnvijfenviuwnerpfijndsvijnedvipnbsdijv;cns;kdalcnkjsdvnerkfu67urfhnuiernvewidvweivnekjfvnkwefvnwepiovnweofvnwpefvnifevnijefnv there u go turn this in and youll get an A+

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?

Health
Is your health is important to you? YES or NO? WHY? Give me (three) examples!

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

Art
Why is it very important, to do Creative ART, in school, Colleges, and ETC.?

Spanish
Is Spanish a Unique Language to learn and to Study? Why?

What are some Leadership Conferences, that are in the State of Georgia?

The Office
Why is it very important to manage Ergonomic Factors?

Psychology
Is Psychology is very important in life? Yes or No? Why?

Physical Science
I will have to come back owm this answer. This will take a little of time to fine the correct answer.

Chemistry
What is the mass in grams of 16.46 mL of acetone?

Pyschology
Learning and behavior. Evaluates thinking.which includes observations,,and testing.

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

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?

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 ...

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 ...

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: _________________________...

(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

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.

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

science

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

science
yes, you are correct i submitted that too in my test correcto

math
If i brought something for19.32 and they give me 20% how much i have to paid

science
If the two ponds were perennial (i.e., year-round) ponds, because of intersecting the water table, how would the presence or absence of water in the other depressions differ from that which is shown?

chemistry honors
A student is asked to make an acetic acid/ acetate buffer with a pH of 4.10. The only materials on hand are 300 mL of white vinegar (5.00% by mass acetic acid, density = 1.006g/mL) and potassium acetate. How should the student proceed?

chemistry honors
A student is asked to make an acetic acid/ acetate buffer with a pH of 4.10. The only materials on hand are 300 mL of white vinegar (5.00% by mass acetic acid, density = 1.006g/mL) and potassium acetate. How should the student proceed?

math
5. A bus on a regular schedule takes 3 1/4 hours to reach its destination. The express bus takes 2 1/2 hours to make the same trip. How much travel time can be saved by taking the express? A. 1 1/4 hours B. 3/4 hour C. 2 hours D. 5 3/4 hours it C right?

MATH
7. Tina lost 3 pounds on the first week of her diet. She gained a pound on the second week, and then lost 2 pounds a week during every week afterwards. She has been dieting for a total of 13 weeks. How many pounds has Tina lost in all? A. 26 pounds B. 24 pounds C. 22 pounds D...

math
eqution is y=2exponet(x)+2 input value if y =34

physics 11
8.8

english
(1) To James, good form came above all else. (2) Therefore, on being introduced to Lady Weathers, he bowed, took her hand, and kissed it lightly. (3) Then, glancing upward at Lady Weathers's face, he saw a look of consternation. (4) Blushing with embarassment, James ...

english
(1) We decided to climb Mt. Rainer, but it was a long, hard journey to Washington State from Medford, Oregon. (2) We were worried about our likely sucess in the cold enviroment of the upper slopes. (3) For one thing, Marty was broke and anxius about having warm clothes for ...

Math
An apprentice Carpenter has designed a wooden coffee table. he expects to sell 25 such tables for 95\$ each at an upcoming artisan market. by conducting a survey, he determines that for each \$2 reduction in the price of the table, he will likely gain three sales. a) an ...

english 4
Which statement best summarizes the political and social atmosphere of 18th century Great Britain.

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