Questions Asked on
September 19, 2015

chemistry
How much heat (in kJ) is required to warm 13.0 g of ice, initially at 13.0 ∘C, to steam at 111.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C.
asked by Alexus 
Chemistry
A solution containing 0.0158 M maleic acid and 0.0226 M disodium maleate. The Ka values for maleic acid are 1.20 × 102 (Ka1) and 5.37 × 107 (Ka2). What is the pH of the solution ?
asked by Alex 
Chemistry 101
I have been attempting this problem so many times. I don't know if I am plugging in the numbers correctly but I cannot seem to get the answer correct. Please help! A patient arrives in the emergency room with a burn caused by steam. Calculate the heat, in
asked by Sabrina 
Biology
Which statement is not true regarding illness associated with malfunctioning cellular organelles? The illness _____ a. can result in a diverse set of sumptoms b. may impact multiple body systems c. is typically simple to diagnose d. may be lethal
asked by Gina 
Physics
A 11.0µF capacitor and a 50.0µF capacitor are charged by being connected across separate 55.0V batteries. (a) Determine the resulting charge on each capacitor. (b) The capacitors are then disconnected from their batteries and connected to each other,
asked by Nick 
Biology
1.A white flowered plants is crossed with a plant that is heterozygous for the trait. What percentage of he offspring will have purple flowers? 2.Two plants, both heterozygous for he gene that controls flower color are crossed. What percentage of their
asked by Gina 
P6 maths
Mrs Wong baked some pizzas for her students. The boy received twice as many pizzas as the girls. There were as many girls as boys in the class. Each girl ate 4/9 of a pizza and they finished all pizzas that were given to them. Each bot ate 3/4 of a pizza
asked by John 
Physics
If the electric field inside a capacitor exceeds the dielectric strength of the dielectric between its plates, the dielectric will break down, discharging and ruining the capacitor. Thus, the dielectric strength is the maximum magnitude that the electric
asked by Anonymous 
P6 maths
Mrs Raja and Mrs lee have some eggs to sell. If mrs raja sells 30 eggs per day and mrs lee sells 15 eggs per day , mrs lee will still have 610 eggs left when mrs raja has sold all her eggs . If mrs lee sells 30 eggs per day and mrs raja sells 10 eggs per
asked by Ellie 
Muhuyuwathomba secondary
Mathematical literacy albert need a car for 12 day,to travel 106km per day.determine the amout he'll have to pay for the corrola 1400? Assume there is no demage to the car
asked by Ondwela 
BPSU
y=ln(tan(3pi/2 ^coshx))
asked by Aldrin santos 
algebra
How do you write,45 less than the sum of the other two angle
asked by rhonda 
statistics
The cholesterol levels of adult American women has a moundshaped and symmetric distribution with a mean of 188mg/dL and a standard deviation of 24 mg/dL. In what interval would you expect most American women’s cholesterol levels to be? Explain.
asked by katie 
Life orientation
Two contemporary social issues in your community
asked by lindiwe liango 
English
Posted by rfvv on Monday, August 25, 2014 at 4:45am. 1. It's been a long time. 2. It's been a while. 3. I haven't seen you for a while. 4. Long time no see.  Are they all the same in meaning? Does 'a while' mean ' a long time' or 'a short
asked by rfvv 
Math
If shahida can iron 5 handkerchiefs in 7 minutes , how long will she take to iron 35 handkerchiefs.
asked by Noor 
Math
The ratio of milk to water in a container is 5:1 by volume. If the total volume of the mixture is 9 liters, find the volume of water in it.
asked by Noor 
Math
In a certain town the ratio of the number of cars to that of taxis is 15:4. If there are 172 taxis in the town , find the number of cars there.
asked by Noor 
geography(development)
Would you say that the division of the world in the northern and the southern part is based on economic development,sustainable development or social development?
asked by melissa 
PHYSICS
3 PARTICLES OF MASS 1KG,2KG,3KG PLACED AT CORNER A,B,C OF AN EQUILARERA TRIANGLE A,B AND C.LOCATE THE POSITION OF PARTICLE/FIND COORDINATES
asked by ARYAN 
Math
At a school with 100 students, 35 take French, 32 take German, and 30 take Spanish. Twenty students take only French, 20 take only German, and 14 take only Spanish. In addition, 7 students are taking both French and German, some of whom also take Spanish.
asked by Spencer 
Science Physics
A plane mirror is mounted at the back of the truck that is moving at 25 km/h. How fast does the image of a man standing on the road seem to be moving away from him?
asked by trsgts 
Science Physics
Two plane mirrors, A and B, are separated by 30.0 cm facing each other. An object is placed 20 cm from mirror A. Locate the first two nearest image formed by each mirror.
asked by trsgts 
Math
Solve these simultaneous linear equations using elimination method : 3a = 2b + 1 and 3b = 5a  3
asked by Olayemi 
math
change fraction 3/4 to a percent
asked by sue 
geography
In school I have Developed, NICs (Industrialising) and Developing countries. I have done most of it. The NICs and Developing are the ones I need help with. For the NICs I have S. Korea, China, Brazil, Mexico and India and I need 3 more, for Developing, I
asked by Damian 
Logarithm help
using logarithms to solve exponential equations. 5^1+x = 2^1x I need exact numbers. I did one on my own already. 5^x1 = 9 5^x1 = 9 log(5^x1) = log9 (log5)(x1) = log9 x1 = (log9/log5) x= (log9/log5)1 x = 2.3652 Logarithm help  Joe, Friday, September
asked by Joe 
chemistry
Name and draw the molecular structure of this compound CH3CH(C2H5)CH(CH3)CH(C3H7)CH2CH3
asked by dan 
Math
A fireman used a ladder with 56 rungs. The rungs are 14 inches apart and 1.5 inches thick. What is the distance from the bottom of the lowest rung to the top of the highest rung? Check if I solved correctly please. I multiplied 55*14 because there would be
asked by Spencer 
ME
Problem 3: Consider water as the substance. (a) Find the specific internal energy (Btu/lbm) when T = 500F and P = 375 psia (b) Find the pressure (psia) when T = 500F and v = 0.02024 ft3/lbm (c) Find the specific volume (ft3/lbm) when T = 500F and
asked by sara 
Kwasa high school
Three ways on how water pollution can impact negatively to the health of the people in our community
asked by Sizwe mavuso 
STATISTICS
Births are approximately uniformly distributed between the 52 weeks of the year. They can be said to follow a uniform distribution from one to 53 (spread of 52 weeks). a. X~ b. Graph the probability distribution. c. f(x)= d. u= e. o= f. Find the
asked by BORNIUCS 
math
Time taken by light to travel 1 meter is roughly 3 x 10 to the negative 8th power. pls. formulate a problem and solution.
asked by jm 
child development
Understanding Reciprocal Determinism I understand it means "individual's behavior influences and is influenced by both the social world and personal characteristics." but that's really all i understand, how would you explain this theory
asked by anonymous 
English
Jay Z has multiple sides to him; he teaches us how to be a successful person, and show us what's important in life v.s. what's not. Is this a good thesis sentence, and also can you give me example of the first part of the sentence and the last part ofd the
asked by Mrs. Keon Meadows 
Physics
Maria throws a ball straight up with an initial velocity of 10 m/s. What is its velocity at the highest point? What is its velocity when it returned to the elevation from where it is thrown ? What is its acceleration at the highest point? What is its
asked by Joyce 
life orientation
Which are the four environmental issues that cause I'll health in our communities
asked by Thozama 
math
Formulate a problem and spolution of the diameter ofvthe atomic nucleus of a lead atom is 1.75 X 10 to the negative 15th meter.
asked by jm 
math
formulate a problem to the charge on an electron is roughly 1.6 X 10 to negative 19th power columbs.
asked by jm 
math
period of a 100 MHz FM radio were is roughly 1 X 10 to the negative 8th s. formulate a problem and solution.
asked by jm 
Chemistry
C. Consider the reaction 2C3H6 + 9O2 6CO2 + 6H2O. If the rate at which C3H6 is reacting is 0.40 mol liter−1s−1, then the rate at which 1. O2 is reacting is 1.6 mol liter−1s−1 2. CO2 is being formed is 0.40 mol liter−1s−1 3. H2O is being formed
asked by Jim 
English
Hi! I'm trying to find a lit device for this quote. This quote is from "The Story of An Hour" by Kate Chopin. I'm struggling to find a lit device. So far I've come up with "contrasting diction" but I'm trying to find an even stronger one. Passage: “There
asked by Richard 
Life orientation
Critically analyze the impact of crime as a contemporary social issue on local communities and poverty on global communities
asked by Tumelo koloti 
Physics
Police find skid marks 65.0 m long on a highway showing where the car made an emergency stop. Assuming the acceleration was 10.3 m/s^ ( about the maximum for dry pavement) how fast was the car going?
asked by Tyler 
Probability
hundred people apply for three jobs. 110 of the applicants are women. (a) If three persons are selected at random, what is the probability that two are women? (Round the answer to six decimal places.)
asked by MiMi 
math
A wall has an area of 7.2 square meter. It was painted yellow and brown. The area of the wall painted yellow was 3 times as large as the area painted brown. What was the ratio of the area painted yellow to the area painted brown?
asked by George 
Physics
Using GRAPHICAL METHOD, find the vector sum of a force of 20 N directed 60 degrees east of north and a force of 60 N directed west? Please show all steps and equations used.
asked by Alyssa 
Spanish
1 of 15 I tried to get there on time, but there was an accident on the freeway: Yo ____(1)____ llegar a tiempo, pero ____(2)____ un accidente en la autopista. Options 1quise or queria 2hubo or habia Answers 1 quise 2 habia 2 of 15 They refused to admit
asked by Matt 
chemistry
Bromine gas is allowed to reach equilibrium according to the equation. Br2=2Br Kc=0.0011 at 1280°C Initial concentration of br2 is 0.063M and Br is 0.012M. How to calculate the concentration of these species at equilibrium. Please help me .
asked by han 
chemistry(ch1001)
When 6.853 mg of sex hormone was burned in a combustion analysis,19.73 mg of CO2 and 6.391 mg of H2O were obtained. What is the empirical formula of the compound ?? Please be detailed...help me.
asked by chancy xdicey 
CHEMISTRY !!! HELP !
A solution containing 0.0158 M maleic acid and 0.0226 M disodium maleate. The Ka values for maleic acid are 1.20 × 102 (Ka1) and 5.37 × 107 (Ka2). What is the pH of the solution ?
asked by Alex 
Relations and Function
p (x)=x^6 a*x^5 b*x^4 c*x^3 d*x^2 e*x f
asked by Edward 
phyics
Why does the distance traveled by the ball in each half second after it is released change in the way that it does? A.Gravity is pulling down on the ball, so it accelerates down at a steady rate. B.The incline plane pushes up on the ball, so it accelerates
asked by rachel 
statistics
what is mock data? And how does it work or what do you do??
asked by Anoymous 
science
You have a different rock with a volume of 30m3 and a mass of 60 g
asked by Anonymous 
Math
Solve 12 / 3 * [8 + (14)2 – 6] + 2 =
asked by Gayla 
phyics
A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. Find a time that the dart moves inside the barrel. Express your answer in terms of the variables L
asked by rachel 
Maths
A mining company ha 10 000 m of fencing available.It wants to use a fencing to enclose a rectangular field. one side of the field is bordered by a river.If no fencing is placed on the side next to the river, What is the largest area that can be enclosed?
asked by Victor Anukam 
AP Chemistry
Hey guys! I'm really lost on this equation. Any help? H2(g) yIelds 2H(g) Delta H = 436 kJ/mol F2(g) yields 2F(g) DeltaH = 158 kJ/mol H(g) + F(g) yields HF(g) DeltaH = 568 kJ/mol Calculate deltaH for:
asked by Allie 
Biology
What are the differences between primary succesion and secondary? Why are there these differences? How do I answer the second question
asked by Anonymous 
geography
what is fault?
asked by zaini 
chem
At 668K 1 mol each of CO and Cl2 are introduced into an evacuated 1.75 L flask. At equilibrium, the total pressure of the gaseous mixture is 32.4 atm. Calculate Kp. How to solve this ? Co+Cl2CoCl2
asked by han 
spelling
Please create a sentence for each word for a 6th grader: 1. partisanship 2. preconceived 3. subjective 4. blithe
asked by f 
ELA
6 events of the book the great rat hunt
asked by Tisy 
Chemistry
Calculate the amount of heat required to raise the temperature of a 65g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Express your answer in Joules.
asked by Rachel 
writting skills
Once you acquire these two basic skills, you'll be able to transform a vague idea in your mind into a coherent piece of writing
asked by deidra jones 
physics
A 1100 kg car accelerates from rest to 27 m/s in 6.0 seconds. Neglecting friction, hat is the average power consumption in horsepower?
asked by Brandi 
History
The Caddo lived on a million acres of land. What characteristics of their culture demonstrated a need for vast amounts of land? A. They made and traded intricate pottery. B. They hunted Bison and raised cattle, hogs, and poultry on farms. C. They worked on
asked by Shi Buringa 
chemistry
I wonder how to calculate the Kp if the question gives us the total pressure and no of mol of reactant. Without giving the mol of product how can i calculate the Kp. Can anybody help me what to do to calculate the Kp. Here is the question im unable to
asked by elly 
Social Studies
What was the main purpose of the settlers who established Jamestown? a.to trap animals and sell furs b.to find gold and silver c.to farm tobacco d.to collect sweetgrass for baskets Would it be B? I am thinking B,or C.
asked by AJ 
Geometry
MP is the angle bisector of angle LMN Given that angle LMP is a right angle what type of angle is LMN
asked by Anonymous 
MATH
Show that C is an integer C=16*2532*75/64*6*16 16(252*3*25)/16*6*64 25(16)/6*64 125/384 0.3255208 Which is a decimal and not an integer. Please help.
asked by Dany 
English
Third Person Limited Narrative ideas?
asked by Anonymous 
Social Studies
The leaders of the Virginia Company recruited more settlers and reorganized the colony. They allowed the new settlers to own land. Those settlers began to grow tobacco, a crop they learned about from the Indians. By 1612, Virginians were shipping tobacco
asked by Trent Brown 
MATH
Plastic plates come in packs of 8, plastic utensils come in packs of 12, and plastic cups come in packs of 20. What are the least numbers of packs you should buy in order to have the same number of plates, utensils, and cups?
asked by lakshmi 
MATH
X/1/3=1/2 X=
asked by lakshmi 
MATH
12/X=4 X= PLEASE SHOW WORK
asked by lakshmi 
physics
A man drops a stone into a water well on his farm. He hears the sound of the splash 3.55 s later. How deep is the well? The acceleration due to gravity is 9.8 m/s 2 and the speed of sound in air is 324 m/s. Answer in units of m Vo= something V= 324 m/s??
asked by Anonymous 
Science
If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky, to be in August? A. 66F B. 83F** C. 103F D. 125F I don't know how to give you think link. Any ideas?
asked by Shi Buringa 
Finance
You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When
asked by Caroline 
American Government
According to the Articles of Confederation, this power was granted to Congress. to regulate trade to enforce laws to amend the Articles of Confederation to levy taxes  This one?
asked by Sandra 
math
greg traveled from his work at an average rate of 25km/hr. By traveling 50km/hr, he took 30 minutes less to return home. how far in kilometers is his work to home?
asked by mary joy tecson 
management
which one of the following philosophies makes every employee a quality inspector for his or her own work
asked by dina 
math
Solve by substitution.. y=4x7 and 2x3y=6 This is the only question i am stuck on, please help..
asked by tina 
Math
Identify the build up of the SineBar to represent the angle. Identify the angle in degrees, minutes and seconds of the arc. Sine29(angle), 17'(minutes),57"(seconds)
asked by Paul 
World History
Why did farming lead to larger populations?
asked by Maryann 
biochemistry
Biochemical macromolecule lab, wheat gluten was tested with glucose? is that possible it emitted a blue color.
asked by Anonymous 
biochemistry
does wheat gluten have any carbs or glucose in it?
asked by Anonymous 
english
how do you write poem?
asked by neima 
Math
Please solve 46x GREATER THAN 15 + 1. I believe the answer is x LESS THAN 3. Is this correct?
asked by Jalen 
physics
100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop? Please show your work.
asked by Brandi 
Physics
When a 0.111 kg mass is suspended at rest from a certain spring, the spring stretches 3.90 cm. Find the instantaneous acceleration of the mass when it is raised 6.20 cm, compressing the spring 2.30 cm.
asked by Stacey 
physics
Vector A has magnitude 8.0 units at an angle of 60o from the xaxis. Vector B has magnitude 6.0 at an angle of 30o from the xaxis. Find the magnitude and direction of vector C = A + B I tried actually drawing it to see if it would help but it didn't I'm
asked by JOHN SMITH 
Chemistry
I am really lost with this. Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), 2H (2.01410 u), and 3He
asked by Bob 
Language Arts
At the end of her aunt's story in "The StoryTeller" the older girl ask whether the girl in the story would have been rescued even if she had not been good. What does she seem to think the theme of her aunt's story? What detail in the aunt's story leads
asked by Candy 
English (Please, Check My Answers)
Insert quotation marks, capitals, and other required punctuation. 1. Do you think Miss Muren asked that you can be ready by noon A: "Do you think Miss Muren asked that you can be ready by noon?" 2. Get out there and fight for the ball yelled the coach 3.
asked by Victoria 
Physics
The mass of a satellite is 2 Kg. Assuming that the mass is evenly distributed throughout the satellite, calculate the moments of inertia about the X, Y and Z axes.
asked by Darrin 
ALGEBRA
A rectangular garden is 30 ft wide. If its area is 2700 ft{}^2, what is the length of the garden?
asked by JHON 
Chem
What is the concentration of a solution made by diluting 85 mL of 6.0 mg/L free chlorine to a final volume of 750 mL?
asked by Z 
Logarithm help
Write each expression as a single logarithm I need help really fast. I have to finish this by today. log4^3 + 1/2log4^8  log4^2
asked by Bob 
Math
The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate
asked by Jennylyn 
Chemistry Help!
When C2H4O2 burns in oxygen, the products are carbon dioxide and water. How many grams of water are obtained from burning 4.76 g of this substance? How would I solve this problem?
asked by wdym 
physics
A rocket is fired at an angle from the top of a tower of height h0 = 65.5 m . Because of the design of the engines, its position coordinates are of the form x(t)=A+Bt2 and y(t)=C+Dt3, where A, B, C , and D are constants. Furthermore, the acceleration of
asked by justin 
Math
The service fee f of a physical therapist varies directly as the number of hours n of service rendered. A physical therapist charges Php 2,100 for 3 hours service to patients in a home care. How much wolud he be paid for 6 1/2 hours of service?
asked by Jennylyn 
Math
If an angle is 20 degrees less than thrice its supplement, find the ratio of the angle to its supplement. Thanks
asked by Janella 
physics
A 15V battery is hooked up to three resistors in series. The voltage drop across the first resistor is 3V and the voltage drop across the sencond resistor is 10V. What is the voltage drop across the last resistor? I don't understand what equation to do
asked by Grace 
Math
The amount of paint p needed to paint the walls of a room varies directly as the area A of the wall. If two gallons of paint is needed to paint a 40 sq meter wall, how many gallons of paint are needed to paint a wall with an area of 100 sq meters?
asked by Jennylyn 
Calculus
I don't know limits fairly well. The problem is prove the limit using definition 6, lim x > 3, 1 / (x+3)^4 = infinity. The books definition for definition 6 is, let f be a function defined on some open interval that contains a, except possibly at a
asked by Anonymous 
Math
105 students were asked if they liked soccer, rugby, or football. 4 liked only rugby, 40 liked rugby, 12 liked only rugby and football, 63 did not like football, 21 didn't like any, 16 liked only soccer and football, 60 liked soccer. How many liked only
asked by Spencer 
Calculus
If the function f is defined by f(x)=0 if x is rational f(x)=1 if x is irrational prove that lim x>0 f(x) does not exist. Can someone help me answer this question step by step so I would know how to prove a question like this next time? Thank you.
asked by Anonymous 
jules
Science
asked by tumi 
phyics
A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i
asked by rachel 
Chemistry
Lead has a density of 11 g/ml. Mercury has a density of 13.6 g/ml. How much more volume would 1 pound of lead occupy the one pound of mercury?
asked by Katie