Thursday
March 30, 2017

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Posts by Jonathan

Total # Posts: 418

Chemistry
The information provided in the bracket above.
March 18, 2017

Chemistry
Calculate the tota bond energy of ethanol from this info:(C_C=347,C_H=414,H_O=464,C_O=360)kJmol-1.Thanks for responding
March 18, 2017

biochemistry
Yeah.(H+) (OH-)=1x10"-14.(H+)(0.2)=10"-14.H+=10'-14/2x10"-1=0.5x10"-14-(-1)=0.5x10"-13 or 5.0x10"-14.
March 18, 2017

Chemistry
M=1.1kg,C=0.385,change in temp=50-27.5=22.5C.Q=1.1x0.385x22.5=?KJ
March 12, 2017

english
2 and 3 is not wrong
March 12, 2017

science
I don't understand your question.
March 12, 2017

Science
Molecular mass= density X 2 = 1.56X2=?
March 12, 2017

Physics
Q=MxCxchange in temp=0.8x4.2x100=336KJ.
March 11, 2017

Chemistry
For water to to boil,ice to melt and for temperature to increase from 35C to 45C,it means heat is absorbed(endothermic).
March 11, 2017

Chemistry
b.The liquid water freezes because heat is given off from it(exothermic) to form ice unlike other options.
March 11, 2017

Chemistry
5Cm3 Of SO3 will be formed by 2.5Cm3 O2.
March 11, 2017

Chemistry
Of O2
March 11, 2017

Chemistry
2SO2+O2=>2SO3 From the equ,1Cm3 of O2 formed 2Cm3 of 2SO3.Therefore, 5Cm3 will be formed by 5 X 1/2=2.5Cm3 of SO3.
March 11, 2017

Biology
i'm not talking about location but functions and actions.
March 11, 2017

Biology
Why?
March 11, 2017

Biology
Is medulla oblongata responsible for peristalsis?
March 11, 2017

Physics
Thanks.
March 11, 2017

Physics
Two perpendicular forces have a resultant of 13N.if one of the forces is 5N, the other force is?
March 11, 2017

Biology
yeah.
March 11, 2017

Biology
Thanks a bunch!
March 11, 2017

Biology
Phylum in the animal kingdom rather.
March 11, 2017

Biology
What's the largest and most successful kingdom in the animal kingdom?
March 11, 2017

Chemistry
What's the resulting solution if 2000cm3 of 1MH2S04 is mixed with 20cm3 of 1M NaOH? i got 0.5M,acidic in concentration.
March 10, 2017

Science
I mean what is can the name of this enhancer be?
March 10, 2017

Science
When a silvery powdery substance was added to boiling beans,the beans get cooked quicker than normal. what may this be?
March 10, 2017

Chemistry
The relationship between velocity(U) of a gas molecules and their relative molecular mass(RAM) is?
March 10, 2017

Chemistry
28.11 i got this but 29 is the answer in my text.
March 10, 2017

Chemistry
what is the relative atomic mass of a silicon containing ore with 92% 28'Si,5%29'Si and 3%30'Si?
March 10, 2017

math
7.55 rather
March 9, 2017

math
75.55.
March 9, 2017

Chem
Actual mass=47.623-46.719=0.904g. mass of CaCo3(Ca=40,C=12,O=16X3=48.40+12+48)=100g %=100/1.631X100
March 8, 2017

social studies
ways in which individuals can apply the concept of independence and self-reliance in their lives.
February 27, 2017

math
1/8X 20=2.5.therefore each dose contains 2.5ml
February 17, 2017

maths
express log9 in terms of log3 x and log3 y and solve for x and y simultaneously
January 21, 2017

Math
A spinner is divided into 8 equal sections. Each section is numbered 1-8. Find each probability for one spin.
January 19, 2017

Chemistry
It's molecular mass is 2.The compound is H2O2.
January 15, 2017

value
A Biased Coin Is Such That The Head Is 4 Times More Likely To Show Up Than The Tail.What Is The Probability Of Obtaining A Head?
November 30, 2016

Calculus
A particle moves along the x-axis so that at any time t, measured in seconds, its position is given by s(t) = 5cos(t) ? sin(3t), measured in feet. What is the acceleration of the particle at time t = ? seconds?
November 29, 2016

Calculus
The position of a particle on the x-axis at time t, t > 0, is s(t) = ln(t) with t measured in seconds and s(t) measured in feet. What is the average velocity of the particle for 1 ? t ? e? a)1 b)e c)e-1 d)1/(e-1)
November 29, 2016

Calculus
The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 60t ? 1.5t^2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop? a)60 sec b)40 sec c)20 sec d...
November 29, 2016

Calculus
A particle moves with velocity function v(t) = 2t^2 ? 3t ? 3, with v measured in feet per second and t measured in seconds. Find the acceleration of the particle at time t = 2 seconds. a)3/4 feet per second^2 b)-1 feet per second^2 c)32 feet per second^2 d)5 feet per second^2
November 29, 2016

Calculus
A particle is moving along the x-axis so that its position at t ? 0 is given by s(t)=(t)In(2t). Find the acceleration of the particle when the velocity is first zero. a)2e^2 b)2e c)e d)None of these Any help is greatly appreciated
November 29, 2016

Math
Jean has $280 in her savings account starting next week she will deposit $30 in her account every week is the amount of money in her account proportional to the number of weeks. Thank you for helping
October 16, 2016

English Check
You would say for me. So it should be you and me since its in the objective form!
September 1, 2016

English Check
So my original answer is correct You and I
September 1, 2016

English Check
But "I" is the subject and you is the object.
September 1, 2016

English Check
The advice was meant for ____ A)you and i B)she and i C) you and me Hello i need help. My original answer was A)you and I. But then I started reading a book on English grammar and it says it should be C)she and I since they are subject pronouns.
September 1, 2016

10th Grade Math
A history class is comprised of 6 female and 9 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be selected? Round your answer to 3 decimal places...
August 30, 2016

pre calc
5x+3yi=5-6i?
July 31, 2016

Math
Thanks you! I got the answer!
June 29, 2016

Math
Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels 12 miles per hour slower than the westbound train. If the two trains are 400 miles apart after 2 hours, what is the rate of the eastbound train? No Rounding.
June 29, 2016

math
If 35% of people surveyed prefer orange to apples.Out of 475 people surveyed how many can be predicted to prefer orange
May 24, 2016

World History
It is ture
May 24, 2016

english
It A
May 24, 2016

Geometry
Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.
April 21, 2016

chemistry
what volume of glycerine C3H8O3, with a density of 1.26 g/mL should be taken to obtain 2.50 ml of glycerine?
April 17, 2016

Math
Larry hit 24 home runs last season and 50 this season. What is the percent of increase in the number of home runs Larry hit from last season to this season?
April 4, 2016

U.S History
Don't You Push Me Down Words and Music by Woody Guthrie Well you can play with me And you can hold my hand. We can skip together Down to the Pretzel man You can wear my mommy's shoes Put on my daddy's hat You can even laugh at me But don't you push me down. ...
March 2, 2016

physics
calculate the electrostatic force between charges of -2.4 µC and +5.3 µC, placed 58cm apart in a vaccum.
February 29, 2016

physics
An artificial Earth satellite, of mass 3.00 × 10^3 kg, has an elliptical orbit, with a mean altitude of 500 km. (a) What is its mean value of gravitational potential energy while in orbit? (b) What is its mean value of orbital kinetic energy? (c) What is its total energy...
February 29, 2016

maths
determine the thrust produced if 1.5 x 10^3 kg of gas exits the combustion chamber each second, with a speed of 4.00 x 10^3 m/s
February 29, 2016

maths
4x+16y:32 and 4x+y:17
February 13, 2016

physics
A capacitor,consisting of two metal plates each of area 50cm2 and space 0.2mm apart in air ,is connected across a 120V supply.Calculate (1)the energy stored..(2)the electric flux density and the potential gradient..
February 13, 2016

Geometry
A photographer enlarged a picture. If the width of the image is 5 inches and the width of the pre-image was x, what is the scale factor for the dilation in terms of x?
January 5, 2016

gale math
How to write 233.75 and 85.50 as a decimal number
December 27, 2015

math
a)without using a spreadsheet, construct an amortization table for the loan repayment b)what is the final payment if she takes all of the four years to repay the loan c)what is the last payment if she chooses to repay the loan in seven payments
December 14, 2015

math
meredith borrows $3600 to help pay for nurse's college. she will repay the loan by making equal blended payment of $625 each at the end of every six months. The interest rate is 11%/a, compounded semi annually.
December 14, 2015

Math
If 500 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? Answer to two decimal places.
December 12, 2015

Ap physics 1
The mass of a star in a galaxy far, far away, is 3.12 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 2.46 × 108 km. Treating this planet and star as particles,with each mass ...
December 11, 2015

Chemistry
what is the wave length and type of light released when an electron absorbs 3.03 x10 -19 j of energy
November 4, 2015

vocab (english)
I have improving Vocabulary skills 4th edition and I need chapter 1 sentence check 2 answers
October 19, 2015

Science
The spin of an object on its own axis is called
September 29, 2015

English
Yeah.it's a must you put 'the'
September 23, 2015

physical science(elecrostatics)
A(-9x10^-9 C) 20mm B(5x10^-9 C) (a)calculate the force between the charges (b)if A comes in contact with B Calculate the new charge on A and B
September 16, 2015

English
bravery
August 28, 2015

algebra 1
One staple is probably to light to pick up on the balance. Let m = mass of one staple. 210*m = 6.8 m = 6.8/210 m = 0.032g
August 22, 2015

Physics
At an instant the block(M = 33kg) is moving down the slope. Angle between slope and floor = 33deg Force Pulling up the slope 49N at 38deg to the slope What is the acceleration of the block up the slope if the kinetic coefficient of friction is 0.5? My first thought was that ...
August 22, 2015

life orientation
Define risk behavior and explain why it is important for teenagers to investigate and be knowledgeable about it.
August 21, 2015

Math
Show that the limit as h approaches 0 of (e^h-1 ) all over h = ln e = 1 using at least two numerical examples.
July 26, 2015

Calculus
Show that the limit as h approaches 0 of (e^h-1 ) all over h = ln e = 1 using at least two numerical examples.
July 26, 2015

cal
Show that the limit as h approaches 0 of (e^h-1 ) all over h = ln e = 1 using at least two numerical examples.
July 26, 2015

Calculus
Find the derivative of the following functions using the f prime of x = the limit as h approaches 0 of f(x+h) – f(x) all over h a)ƒ(x) = x2 + 5^x b)ƒ(x)= 1/2^x
July 26, 2015

Calculus
Givenƒ(x) = ex, verify that lim h->0 (e^x+h - e^h)/h + e^x and explain how this illustrates that ƒ′(x) = ln e • ƒ(x) = ƒ(x)
July 22, 2015

biology help
What are the biological terms of the following 1.A diagram that show the evolutionary history of plant groups 2.hoploid cell which grows into a plant
June 17, 2015

physical science chemistry
If 25 cm^3 of the potassium hydroxide (KOH) solution was used to neutralise 35cm^3 hydrochloric (HCl)solution, determine the concentration of the hydrochloric acid solution. Thanks
June 17, 2015

science
1. Descriptive statistics are widely used in qualitative research. When establishing if a population is normally distributed explain when the statistics of sample size, mean, mode, median, skewness and kurtosis will guide the researcher to make conclusions of a normal ...
May 30, 2015

Life orietation.
The powers of the police during a protest.
May 21, 2015

English
english is the language of opportunity
May 5, 2015

maths
PLEASE DO NOT POST PROBLEMS FROM THE PROMYS APPLICATION SET. YOU HAVE BEEN REPORTED.
April 15, 2015

Chemistry
What is the change in entropy when 9.30 mL of liquid benzene (C6H6, d = 0.879 g/mL) is burned in the presence of 37.2 L of oxygen gas, measured at 298 K and 1 atm pressure? 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(l); ∆S° = –437.7 J/K at 298 K
April 11, 2015

Help please
WTF is with all these haters ? Like you enjoy doing your fckn schoolwork, I know how to do them, I'm just lazy . gtfoh john & writeacher
April 6, 2015

chemistry
Determine the limiting reactant for this reaction if 3.027 grams of Aluminum are reacted with 60.00 mL of a solution that is 6 M KOH. Determine the amount of KAl(SO4)2•12 H2O that can be produced from this reaction. Molar mass Alum = 474 g/mol 2 Al (s) + 2 KOH (aq) + 22 ...
March 29, 2015

Probability
Consider 10 independent tosses of a biased coin with the probability of Heads at each toss equal to p, where 0<p<1. Given that there were 4 Heads in the first 7 tosses, find the probability that the 2nd Heads occurred at the 4th toss. Give a numerical answer.
March 3, 2015

math
Michaela makes original stationary to give away as gifts. She likes to put a small bow in the corner of each card. She purchased a piece of ribbon that was 3 1/4 ft long. She can make each bow out of 1/3 ft of ribbon. Which equation would be used to show how many bows she can ...
January 16, 2015

Math
a pool 5 feet deep with a diameter of 40 feet is filled with water in 50 minutes. how long will it take to fill a pool that is 6 feet deep with a diameter of 36 feet?
January 8, 2015

physics
0.160kg
November 5, 2014

Calculus
A 13 foot ladder is leaning against the house when it's base starts to slide away. By the time is 12 feet from the house the base is moving at the rate of 5 ft/sec. 1.How fast is the top of the ladder sliding down the wall at that moment? 2. At what rate is the angle theta...
October 16, 2014

algebra 2
This is a repost from earlier. I thought it didn't go through so I typed it again.
August 24, 2014

algebra 2
You have $25 to park your car in a garage in the city. The garage charges $4 for the first hour and $3 for each additional hour. Write an equation & determine the possible number of hours you can park. Help Again!
August 24, 2014

Algebra
Express as a single logarithm and, if possible, simplify: In x^2 + 3In x-In x^8 Thanks so much
August 2, 2014

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