Questions Asked on
March 20, 2016

chemistry
When hydrogen peroxide (H2O2) is used in rocket fuels, it produces water, oxygen, and heat. 2H2O2(l)⟶2H2O(l)+O2(g)ΔH=−196kJ How many kilojoules are released when 2.65 moles of H2O2 reacts? How many kilojoules are released when 234 g of O2 is produced?
asked by marcy 
Health
The state in which a person's mental and physical abilities are impaired is called? A. Hangover*** B. Black out C. intoxication D. a coma
asked by A girl with problems. 
Language arts
In the multidraft reading process, what does a reader look for in the third reading? A. How details about the characters come together to define a drama's themes*** B. Major details about the characters and conflicts C. The role that dialogue has in
asked by Human 
Chemisrty
if electricity of sufficient voltage is passed into a solution of potassium iodide in water, a reaction takes place in which elemental hydrogen gas and elemental iodine are produced, leaving a solution of potassium hydroxide. what is the unbalanced
asked by Mandy 
math
it is given that y is directly proportional to xn. write down the value of n when (i) y m square is the area of a square length x m . (ii) y cm cube is the volume of a cube of length x cm.
asked by nurul 
science help PLS
Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of
asked by Oscar 
Math
A ship is 60 miles west and 91 miles south of the harbor. a) What bearing should the ship take to sail directly to the harbor? (Round answer to nearest tenth of degree.) b) What is the direct distance to the harbor?
asked by Blake D 
History
Please check! 3. What is the effect of the depression of the 1890s on South Carolina? a. Gold was discovered in Alaska. b. Many banks failed and railroads went bankrupt. c. Paper money was no longer backed by gold.*** d. Inflation caused farmers to run
asked by SpitFireRedHead 
reading
(1) Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. (2) A greenhouse stays warm because sunlight and heat coming through the glass roof are mostly trapped. (3) The heat doesn't radiate back into the
asked by Anonymous 
maths
A car travels 40 miles per gallon of petrol. How many kilometres can it travel on 5 gallons of petrol? (From a KS2 CGP SATs question book). The solution in the book says 40/5 = 8 8x8=64 64x 5 = 320Km I get the 64x5 =320Km, but not the first bit. Can anyone
asked by Anna 
mathematicsAlgebra
I think of two whole numbers;the product of the average of the sum and difference of the numbers and the difference of the sum and difference of the numbers is 12.if three times the first added to the second makes up 11..find the two numbers please show
asked by p1 
Chemistry Honors
Nitrosyl chloride (NOCl)decomposes to nitrogen oxide and chlorine gases. The concentration of NOCl drops from 0.580 M to 0.238 M in 8.00 min. Calculate the average rate of reaction over this time interval.
asked by Caden 
Math
A 200foot cliff drops vertically into the ocean. The angle of elevation from a ship to the top of the cliff is 22.3 degrees. How far offshore, to the nearest foot, is the ship?
asked by Matthew Yeargin 
Math
So, this "kiddo" needs some help plz! You are having a discussion about sequences with your classmate. She insists that the sequence is 2, 3, 5, 8, and 12 must be either arithmetic or geometric. Is she correct. Explain. HELP I DO NOT UNDERSTAND THIS!!!!!
asked by No one special 
History
Please check! 1. What was the effect of the rise of unions in the late 1800s? a. The population in cities quickly grew.*** b. South Carolina developed many unions prior to World War I. c. Workers had more bargaining power with management. d. Living
asked by SpitFireRedHead 
Language Arts
"Their flag to April's breeze unfurled ...." What's the symbol? And what does it represent? HELP
asked by HELP 
chemistry 1020
You have 67.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?
asked by Anonymous 
History
Please check! 2. What changed almost every aspect of life in South Carolina in the late 1800s? a. the discovery of gold b. the rise of inflation c. the election of President McKinley d. the development of electric power***
asked by SpitFireRedHead 
Maths
I am a threedigit number. I am divisible by 6. My middle digit is a prime number. The sum of my digit is 9. I am between 400 and 500. My digits are descending order. What number am I?
asked by Frotel Mana 
can someone help and explain plz
can someone give me 3 examples of how where Carolina lives shapes her life and the opportunities available for her and her family. and then include how Caroline life would be different if she lived in a different region of mexico
asked by im new here 
Physics
A 5kg block is being pulled on a horizontal frictionless surface. The tension in the string is 30N. What is the total work done on the block as it moves a distance of 10 meters? Thank you very much!
asked by Steve 
physics
Given a slab with refractive index n=1.33 and incident light striking the top horizontal face at angle i.The maximum value of i for which total internal reflection occurs is:
asked by Manu 
calculus
Find the solution of the differential equation that satisfies the given initial condition. dp/dt=2 sqrt(pt), P(1)=5 my answer: P=(2/3t^(3/2)+(15sqrt(5)10)/15)^2 how is it wrong?
asked by kyle 
algebra
using cross multiplication method solve 3x+5y=25 , 7x+6y=30
asked by manikandan 
history
can someone give me 3 examples of how where Carolina lives shapes her life and the opportunities available for her and her family and plus a pragraph in the tree examples
asked by im new here 
Physics
A 5kg block is being pulled on a horizontal frictionless surface. The tension in the string is 30N. If the block has an initial speed of 2m/s, what is the speed after moving 10 meters? Please help!Thanks
asked by Donna 
Math
Carol makes a spinner for a game. The spinner is divided into 10 equal sections. Each section is shaded 1 of these colors: green, red, yellow, or blue. On this spinner, the probability of spinning green is 3 times as great as the probability of spinning
asked by Mason 
math
At East Coast Dogs, 2 of the last 7 customers wanted mustard on their hot dogs. What is the experimental probability that the next customer will want mustard?
asked by Anonymous 
Algebra
Lynn is tracking the progress of her plant’s growth. Today the plant is 5cm high. The plant grows 1.5 cm each day. Find the height of the plant after 20 days.
asked by Natoutou 
Science AP Chemistry
It is necessary to add iodide ions to precipitate the lead(II) ions from 250 mL of 0.076 M Pb(NO3)2(aq). What minimum iodide ion concentration is required for the onset of PbI2 precipitation? The solubility product of PbI2 is 1.4 × 10−8 . Answer in
asked by Jacaria 
Algebra
A building is 2ft from a 9ft fence that surrounds the property.A worker wants to wash a window in the building 13 ft from the ground. He plans to place a ladder over the fence so it rests against the building.He decides he should place the ladder 7ft from
asked by Anonymous 
Algebra
calculate the time for the colony to reach 1 million bacteria. Number of bacteria present. Doubles every minute 2 4 8 16 32 64
asked by Suzanne 
Maths
The probability a pupil takes a bus to school is 0.3. If a sample of 10 pupils are chosen at random. Using binomial distribution. Find the probability that a) exactly four pupils travel by bus. b) more than six pupils travel by bus.
asked by Chris 
mathematics
Find the angle of depression of a boat from the bridge at a horizontal distance of 25 m from the bridge if the height of the bridge is 25 m
asked by Rahul 
Math
A billboard is 2.5 times as long as it is wide. The area of the actual billboard is 2,250 square feet. A scale drawing is made of the billboard and the area of the scale is 160 square inches. What is the scale used in the scale drawing?
asked by Blargh 
Algebra
You had some cookies and milk for breakfast this morning. The total number of calories of your breakfast is 232. Each cookie has 25 calories and a bottle of milk has 57 calories. How many cookies did you have for breakfast?
asked by Natoutou 
chemistry
Ould you please offer me some insight to this, Calculate the hydrogen ion concentration (H+) for the aqueous solution in which (OH) is1×1015 mol/L. Is this solution acidic, basic or neutral? Thanks in advance
asked by lulu 
Math
How many different sums of money can U make with 4 pennies, two nickels and six quarters
asked by Rose 
History
I've been looking for the answers to questions on my study guide for a test I will have for a couple hours and I got a lot of them. However, there are some that I still have a hard time finding. Here are the questions. If I can be told even some of these,
asked by Stefan 
Applied statistics
A fireworks show is designed so that the time between fireworks is between one and five seconds, and follows a uniform distribution. a. Find the average time between fireworks. b. Find probability that the time between fireworks is greater than four
asked by Nandini 
politcal science
In Washington's Farewell Address, what type of policy did he advocate when dealing with foreign countries? Question 6 options: Complete isolation for all foreign countries Extensive treaties with other countries Expansion of US power over foreign countries
asked by Gary 
chemistry
Consider the following mechanism: STEP 1: A > B +C (slow) STEP 2: C+D > E (fast) OVERALL: A+D> B+E Determine the rate law for the overall reaction (where the overall rate constant is represented as k). please help me. how do i do this problem?
asked by Anna 
math
You are on a 650mile trip by car. Your car used eight gallons of gas to travel the first 210 miles of the trip at the same rate. How much more gas will you need to make it the rest of the way?
asked by 7 
Algebra
T wo hundred and fifty tickets are available for sale for a school dance. On Monday, 35 tickets were sold. An equal number of tickets were sold each day for the next five days. H ow many tickets were sold on one of those days?
asked by Natoutou 
Math
The rental rate at rent a wreck is 30$per day plus $0.25 per mile driven
asked by Anonymous 
asomaning
Aluminum has specific heat capacity of 900j/kg explain this statement?
asked by nanaldo 
chemistry
What mass of Na2SO4 is needed to make 8.5L of 4.0M solution? Is the answer 7480 grams?
asked by lulu 
electric field
Two equal positive charges q are placed at the opposite vertices of a square of side a. Determine and show on a diagram the electric field created by these three charges at the fourth vertex of the square. Thanks.
asked by angy 
Physics
a bird is flying through the air with an air speed 12.6m/s heading 27.7 west of north. it is a windy day with wind velocity blowing at 8.95m/s heading 12.5 south of west. what is the velocity of the bird as seen by a person on the ground
asked by Jen 
physics
the tires of a certain car begin to lose their grip on the pavement at acceleration of 5 m/s to the power of 2 if the car has this acceleration , how many seconds does it required reaching a speed of 25 m/s starting from 10 m/s?. Please help me
asked by shiela vargas 
Math
Sue bought a new dress while on holiday in the USA. The sales tax was 8%. If she was paid $6.40 tax, and if she was charged 15% duty on the original purchase (before tax), how much did she pay in all?
asked by Matt 
Chem
A student reacts 57g of salicylic acid with 21 mL of acetic anhydride producing 10.5g of acetyl salicylic acid. What is the percent yield of the reaction?
asked by Kennedy 
Math
Can someone point me in the right direction on how to solve this problem? Which algebraic expression is equivalent to the expression? 4(2x + 5)2
asked by Destielforever 
algebra
Square root of 39 (square root of 6 minus 4)
asked by angie 
macroeconomics
How are currency exchange rates determined?
asked by Anonymous 
Math
For a calculus quiz, the teacher will choose 11 questions from the 15 in a set of review exercises. How many different sets of questions could the teacher choose
asked by Rose 
math
Michael has 18 decorative square tiles to make a design on a kitchen backsplash. He wants to arrange them in a rectangular shape with the least perimeter possible. How many tiles will be in each row?
asked by Lizzie 
Maths
the product of two consecutive even numbers is 12 more than the square of the smallest number.Find the numbers
asked by molf 
Chemistry
When 28g calcium reacts with 25 grams oxygen, how many grams calcium oxide form? I have 2Ca+ 2O2= 4CaO its is not working. Stoichemistry. I have the Ca as the reactant that is limiting? Please help.
asked by Sarah 
geometry
Flower seeds will be planted at points that lie on a circle that has a diameter of 8 feet. The point where any seed is planted must be 2 feet away from the seefs on either side of it. What is the maximum number of seeds that can be planted.
asked by nik 
Algebra
The cost of a large pizza is $7.99 plus an additional $0.99 for each topping. Tom ordered a large pizza that cost $10.96. Write and s olve an algebraic equation to find the number of toppings on the pizza.
asked by Natoutou 
politcal science
Who is the only thirdparty candidate to win more than 25% of the popular vote? Question 7 options: Millard Fillmore Theodore Roosevelt George Wallace Ralph Nader
asked by Gary 
Physics
A stone A is dropped from the top of a very high platform. At the same time another stone is thrown vertically upward from the ground level with an initial speed of 50m/s. At the instance that the stone passes each other, the ration of the velocities of A
asked by Jefferson Mckinley 
social studies help
explain the advantages and disadvantages of independence of different countries? I chose the u.s. and cuba
asked by sunshine 
Math
Hi spent 53$ on tulips and orchids. The tulips cost $6 each and $7 for orchids. If she bought 8 flowers all how many tulips did she buy
asked by Dicle 
Chemistry
Aqueous sodium sulfide reacts with aqueous calcium chloride to make a solid. The % yield is 85%. Calculate the amount of each reactant needed to actually make 3.0g of the solid.
asked by Dan 
Physics
Bob (80 kg) lands with a resultant GRF of 1200 N at an angle of 80 degrees from the horizontal. Round answers to nearest whole number. What was his vertical acceleration during landing?
asked by Matthew 
Economics
How are long and short term equilibrium prices set?
asked by Anonymous 
math lit,life science,agriculture,geogrphy,L.O,
Which good career path is good for the following subject
asked by Thulani 
Algebra
Jane wants to buy T  shirts at $12 each and dresses at $30 each. If Jane has a budget of 150 dollars, how many dresses can she buy if 5 T  shirts are bought?
asked by Natoutou 
english
Please can someone composed a short poem for me.?
asked by lyn 
PreCalc
Write the quadratic equation whose roots are 2 and 1, and whose leading coefficient is 1 Not sure even how to start?
asked by Dee 
English
1.I'm worried about my looks. I want to become more handsome. What should I do?  Why don¡¯t use organic cosmetics on your face?  Why don¡¯t put organic cosmetics on your face?  Why don¡¯t you wash your face more often?  Why don¡¯t you have
asked by rfvv 
Algebra
The foundation of a house is in the shape of a rectangular solid. The volume of the foundation is 2080 cubic feet. The height of the foundation is 10 feet and the width is 8 feet. What is the length of the foundation?
asked by Dee365 
math
This table shows the distances and time wade walked in two days. Friday 1.5 miles 0.5 hours Saturday 1.15miles 0.4 hours on which of these days did wade walk at a faster rate?
asked by jessica 
chemistry
Then the answer would be 4828 grams, right. I was using 2 molecules of SO4. What is the mass of Na2SO4 needed to make 8.5L of 4.0 M solution?
asked by lulu 
math help pls pls pls
Create an example of a polynomial in standard form. How do you know it is in standard form? pls help me
asked by Oscar 
Physics
Draw a FBD of an object that has forces acting on it that are not at right angles. If someone can provide me of some sort of example of what situation could represent this i would appreciate it.
asked by Steve 
math
The areas of two similar triangles are 16 and 25. What is the ratio of a pair of corresponding sides?
asked by Charlotte 
math
if 50,000 tons of freight imports came from japan and 200,000 came from the USA. Can you show the difference between the two in a percent? it says the the 50,000 tons from Japan is 30% less than what was imported from the USA which is 200000. But i can't
asked by Jacob 
Science
Belonging to one communtity
asked by Jensy 
expansion help!!! maths
write down the expansion of (1+xx^2)^6 in Ascending other please show full working!
asked by collins 
Math
If an isosceles triangle has 2 side lenghts of 7 inches and 14 inches, what is the third side? Show you work.
asked by Blargh 
Chemistry
The first part of this questions answer is 4.291975376e4 What mass of KI must be added for PbI2 to form? Answer in units of g.
asked by Jacaria 
mathstats
There are 40 items in which 8 are defective. if 6 items are selected at random, what is the probability that 4 are non defective?
asked by 
Math
How do i make a table of value for a quadratic relation? How do i know what xvalues to use in the table? Can someone show me using this set of equations as an example. y= x^2 y= (x2)^2 y= (x4)^2
asked by Parabola 
physics
A ball of mass 0.50 kg is thrown vertically upwards, calculate the net force on the ball at the top of its flight
asked by Duy 
Demography
What is the current total world population??
asked by Winniefred 
Math
What is the difference between geometric patterns (with numbers) and arithmetic patterns?
asked by No one special 
Science
a bullet with mass 0.281 kg is fired from a rifle. It stick into a block of wood with a mass of 17.8 that was at rest. The block/bullet combo moves at 3 m/s. What was the initial velocity of the bullet?
asked by lara 
Math
billys bike has wheels of diameter 70 cm he invented a counter for his bike which counts the number of revolutions the wheels make one day the county shows 350 revolutions how far has Billy cycled
asked by Alicia 
Discrete Math Help
1) How would I prove that (n  1 + 2 C 2) = n + (n C 2) 2) A cafeteria offers 17 types of pizza and 5 types of soda. Bob goes there everyday for lunch, always buying two slices of pizza and one soda. However, he never gets exactly the same thing on two
asked by David 
math
What type of different distance rate problems are there?
asked by Ariana 
politcal science
Which of the following is NOT one of the Republican party factions? Fiscal Conservatives Libertarians Organized labor Neoconservatives
asked by Gary 
politcal science
As of January 2015, how many members of the House of Representatives and the Senate are NOT members of the Democratic or Republican party? 0 123 100 2
asked by Gary 
math
if x is directy proportinal to y cube and y=2 when x= 1, (a) find an equation connecting x and y. (b) find the value of x when y = 1 (c) find the value of y when x=108.
asked by nurul 
MATH
Am I correct? A suit that normally sells for $300 is on sale for $225. By what percent has the price of the suit been lowered? 300225=75, 75 x 100=7500, 7500/300=25 Answer 25%
asked by Amie 
electronics
Find the value of the remaining components of a common emmitter single stage amplifer circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5, Vcc=8v show workings
asked by kaycee 
Chemistry
Which two conjugates could not undergo hydrolysis to act as buffers? C6H5COO H2PO4 NH4+ ClO4 C5H5NH3+ F Br
asked by Mikah 
science
How much sodium bromide do I need to make 100 ml of 0.2m solution?
asked by margaret 
Math
If 1 > x > 9/8, which is bigger, ∛3x or √2x.
asked by Lance 
Math haha
Simplify: ( 7/2+5/6 )^2  ( 7/25/6 )^2
asked by Lance 
Math
Expand (3x)^7 Would i start like (3)^7(x)0 etc....
asked by Rose 
geometry
In a square of compost 4 ft by 4 ft. Ms. Lee had 1000 worms. How many worms can she have if her square of compost has a side lenght that is 8 times longer?
asked by Anonymous 
itü
A block of mass 7.63 kg is sliding at a constant velocity down an inclined plane that makes an angle of 33.9° with respect to the horizontal. What is the friction force?
asked by aslan 
physics 101
A truck is moving at the speed of 30 miles per hour, what is it's speed in meter per second.
asked by Grace 
Other
What's a good way to tell a human skull from a rock at home
asked by Glenn 
electrical electronics
Find the value of the remaining components of a common emmitter amplifer circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5 show workings
asked by john 
Physics
your car has stalled and has come to rest on a level section of a busy street. you and a passenger decide to push the car to the side of the road so it will not interfere with the trafic. together you excert a combine horizontal force of 1320N. the
asked by Jen 
logarithm help!!!!
k/k^5=logk find k
asked by collins 
Math
A bracelet is 8 inches long. The string to make it is sold by the foot. What fraction of a foot is used to make the bracelet? Anything would help! 12 inches= 1 foot
asked by C 
electronics
Find the value of the remaining components of a common emmitter single stage amplifier circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5 show workings A
asked by kaycee