Posts by Karina
Total # Posts: 145

Chemistry
How many moles of calcium carbonate, CaCO3, are in 1.500 L of a 0.40M calcium carbonate solution? 
Chemistry
What is the molecular formula of a molecule that has an em formula of CH and a molecular mass of 78.11 g/mol? 
Chemistry
How many grams of sodium hydroxide, NAOH, are needed to make up 580 ml of 1.50M sodium hydroxide solution? 
Chemistry
A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction? 
Math
hanna has a bag of 15 red, 11 orange 9 yellow, 12 green, 6 blue and 11 purple crayond.How many times would you expect ganna to puck a red crayon if she picked a crayon 90 times? 
Politics
Whats is an example of a change in political relations between powers that was in part the result of a change in discourse? 
Personal Finance
A $5000 loan has a stated rate of 10% but it will be paid off in 12 equal monthly payments. What is the APR on the loan? 
Math
The answer is 6.3 
Improving vocabulary
Final chech conflict over holidays 1.? 2.? 3.? 4.? 5.? 6.? 7.Benevolent 8.agnostic? 9.affiliate 10.?diversion I really need this help cuz it's my final 
Math algebra
Sharons rectangular vegteable garden is 20 feet by 30 feet. In addition mulching her garden, she wants to put mulch around the outside of her garden in a uniform width. If she has enough mulch to cover an area of 936 sqaure feet, how wide should the mulch border be? 
math
A scale drawing of an American flag is 10 inches long and 6 inches tall. The actual flag is 3 feet tall. a. True or False, the scale of the drawing is 2 in. : 1 ft. b. What is the perimeter of the american flag in the scale drawing? c. What is the area of the american flag in ... 
Math
Tina baked a loaf of cinnamon bread and cut it into 15 equal pieces. Four people ate an equal number of pieces left. there are three pieces left. what fraction of the bread to each person eat ? 
Math
6253272 
math
12 
Science help
what are you supposed to do ?? 
Math
What statement makes this true? 9^2 A.81 B.18 C.1/81 D.1/81 Is it A? 
Math
I don't know if my answer for this question is correct but can you please check? 1.) Between which pair of numbers does the square root of 15 lie? Do without using a calculator. A.) 3.7 and 3.8 B.) 3.8 and 3.9 C.) 3.9 and 4.0 D.) 14 and 16 I think the answer to this might ... 
Chem/bio question
HA is an acid that ionizes in 10% in solution. what is the [h+] of a 0.01 m solution of ha? 
geometry
which point is the midpoint of AE if A=6, B=4, C=2, D=1, E=8 
math
simplify 4 root of 500 over 4 root of 5 show work 
Physics
A car's bumper is designed to withstand a 6.84km/h (1.9m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that ... 
Physics
Using energy considerations, calculate the average force a 62.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 5.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him. 
physics
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a θ = 50.0° slope at constant speed. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves 30.0 m along ... 
Physics
An automobile with 0.300 m radius tires travels 75,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear? 
Physics
The existence of the planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, since Pluto is small and the irregularities in Neptune's ... 
Physics
At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? Incorrect: Your answer is incorrect. rpm (b) What is the centripetal acceleration at the edge of the tire? Incorrect: Your answer is incorrect. m... 
health
The breathing process is controlled by (Select all that apply) A. The diaphragm B. The pharynx C. Blood vessels D. rib muscles 
engllish
how are united states and canida alike in terms of farming and maniufacturing? 
english
which seven counteries are located in central america? 
english
which river flows into the gulf of mexico? 
english
which twoo counteries are farthest south? 
english
some times the number of electors for a particular states change what can be the cause for that change? 
Math
No 
math
Jon got 9 correct out of 15 on his test. What was his percentage of correct answers? 
physics
15 revs 
8th Grade Writing
That's great! that was my main idea but how would he be able to get the money from his brother anyway? so far i have made it so that the guy kidnaps his brother and his brother's wife. the daughters going to save them but how would he take the money? 
8th Grade Writing
oh that's a great idea!!! i love it thank you!! 
8th Grade Writing
That's great! that was my main idea but how would he be able to get the money from his brother anyway? so far i have made it so that the guy kidnaps his brother and his brother's wife. the daughters going to save them but how would he take the money? 
8th Grade Writing
Hello, I'm writing a story and was wondering if someone could give me realistic reasons as to why a brother would kidnap hid brother? that's kind of what happenes in my story. the brothers are like 50 years old though. thank you! 
Science ASAP
The B horizon 
Math
What is 6(a+7) when a=8 
Chemistry
Calculate the work done (in joules) by a chemical reaction if the volume increases from 3.3L to 3.5L against a constant external pressure of 3.7atm . 
Statistics
What critical value for z would be used to test the hypotheses: H0:μ≤10 and Ha:μ>10, for α = 0.05 ? 
Math
3:00 
Math ASAP please
WHATS THE RIGHT ANSWER 
chemistry
Oxygen gas is collected over water at a temperature of 20c. If the totalmpressure of the system is 755mm, what is the pressure of the dry O2 gas? 
algebra
In most state and local courts, 12 jurors and 2 alternates are chosen from a pool of 30 prospective jurors.The order of the alternates is specified. If a juror is unable to serve, then the first alternate will replace the juror.The second alternate will be called on if another... 
algebra
Consider making a fourdigit I.D. number using the digits 3,5,8, and 0 a. How many I.D. numbers can be formed using each digit once? b. How many can be formed using each digit once and not using 0 first? c. How many can be formed if repetition is allowed and any digit can be ... 
algebra
A fair sixsided die is rolled. If the number showing is even, you lose a point for each dot showing. If the number showing is odd, you win a point for each dot showing. a. Find E(x)for one roll if x represents the number of point s you win. b. Find the expected winnings for ... 
math
Suppose you want to row your boat across a 3milewide river. You can row at a speed of 2.5 mi/h. The current is flowing south at a rate of 1.4 mi/h. At what angle upstream should you aim your boat so that is ends up going straight across? 
CJ 216
Summarize the results of your evaluation of what crimes Uncle Bob could be charged with and the ability of the police agency in Florida to obtain this information. This is what it gets me confused? 
CJ 216
Discuss the possible communication methods between the officer and his/her agency. Analyze the information available to the Miami Police Department and the flow of information from California to Florida. Explain at least four ways that this information is shared between local ... 
CJ 216
Discuss the possible communication methods between the officer and his/her agency. 
Calculus
Consider a hemispherical bowl of radius 10cm. (4 points) If the water level in the bowl is h cm deep, find the radius of the surface of the water as a function of h. (6 points) The water level drops at a rate of 0.1 cm per hour. At what rate is the radius of the water ... 
probability
the model of the car you are thinking of buying is available in five different colors and four different styles. In how many ways can the car be ordered? 
math
On vacation, Le Hong averaged 45 mph traveling from city A to city B. Returning by a different route that covered the same number of miles, he averaged 50 mph. What is the distance between the two cities if his total traveling time was 30 hours 
math
The fraction of a mix that is red paint 1/4 
CHEMISTRY
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm) 1.032 atm Using this data... 
Chemistry
Calculate the number of moles of CO2 1.3/44.01+.029 This doesnt work 
Chemistry
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm) 1.032 atm Using this data... 
science
i need an acrostic poem of the word eukaryotic 
math/linear
4x + 5 = 2x + 19.. need to break down into coins and pouches. Need to know how many coins in each pouch. 
Physics
A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s, how far does the block ... 
Math
In the number 7,725 , which places contain digit is ten times great as the other 
dressmaking
Which type of fastener becomes more secure when yu try to pull the garment pieces apart? a) snap fastener b)hook and eye c)velcro d)zipper I feel the answer if b)but feel it cld also be d)What do yu think is right 
dressmaking
The tops of pants or a skirt is finished with facing when a)extra strength is required at the waistline b) its not possible to layer the fabric c) a stay tape cant be used in the seams d0yu don't want the waistband to be visible from the right side. My thinking for this is... 
math
115.2 
math
I am a set of 5 whole numbers that are less than 30. My median is 10. My range is 15. My mode is 10. The smallest number in my set is 10. My mean is 14. What are my numbers? 
psychology please help asap
Why might the study of identical (monozygotic) twins be valuable in constructing a model of abnormal behavior? How would dizygotic twins be different? 
Math
The answer is 10, 20, 40, 80, and 160. 
English
ajfvcmmmmmmmmm 
CHEM AP please help!!
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s i tried every way and still cant get it..please someone help 
integrated algebra
you do 1 + 2 which is 1 that gives you 2y= 1 now you know what to do. Just dived the 2 and you will get y=1/2 that is your equationits a straight horizontal line at y=1/2 with x values changing 
CHEMISTRY AP
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s I used the principle and got 2.48e29 its wrong..and since its a fly i ... 
physics
A rocket, initially at rest on the ground, accelerates straight upward with a constant acceleration of 34.3 . The rocket accelerates for a period of 8.00 before exhausting its fuel. The rocket continues its ascent until its motion is halted by gravity. The rocket then enters ... 
programming
Just wanna know if this is right!!! #include <iostream> #include <string> using namespace std; const string DAY1 = "Monday"; //days in the week const string DAY2 = "Tuesday"; const string DAY3 = "Wednesday"; const string DAY4 = "... 
programming
How do you write a program that prints out your course schedule for a week? Here's an example of the output for one day: Monday 9:00 Computer Science 101 Monday 11:00 Physics 201 Monday 2:00 Dance 153 
COLLEGE ALGEBRA ..HELP!
Solve by completing the square 12x^2+11x=5 
COLLEGE ALGEBRA
so hold on what is the answer? 
COLLEGE ALGEBRA
Solve by completing the square 12x^2+11x=5 
math
how you could show five less than a number using a expression 
math
The product of two consecutive integers is two hundred forty. Find the two integers. 
math
The length of a rectangle is three less than three times the width. The area is 90ft^2. Find the width and the length of the retangle. 
Art 17th Century Europe
A: Dramatic style, light and context in my opinion no other paintings portray baroque style as The Prodigal Son by Rembrandt van Rijin, The Raising of the cross by Peter Paul Ruben and The Conversion of Saint Paul by Michelangelo da Caravaggio. This style was very popular ... 
Science
Explain how would the gravitational force between Earth and the Moon change if the distance between them increased? 
fractions
2/5 of 15=? 
CRIMINAL JUSTICE
question #3: no they shouldn't use the same type of management style because they all differ, sure they deal with mostly criminals, but their jobs differ and therefore using the same style might only work with only the police & not for the courts and corrections.. 
pre cal
If an 22inch tire rotates 40 times per 2 minute, determine th elinear and angular speed of the tire. 
pre cal
A boat has passed directly over a submarine as pictured below. The sub is running at a depth of 588 ft, and the angle of depression from the boat to the sub is 35 degrees. Find the distance, x, from the boat to the submarine. 
pre cal
A submarine must descend 516 meters to explore a shipwreck. The submarine begins a constant descent to the shipwreck so that it will reach the shipwreck after traveling 2976 meters from the pint of its initial descent. What angle of descent did the submarine make? What ... 
pre cal
A submarine is traveling parallel to the surface of the water of the water 492 feet below the surface. The submarine begins a constant ascent to the surface so that it will emerge on the surface after traveling 3974 feet from the point of its initial ascent. What angle of ... 
pre cal
Tamara is flying in a hot air balloon. The hot air balloons is flying at an altitude of 1100 feet. The ground distance to the landing site is 1400 feet. What is Tamara's angle of depression to the landing site? What is the actual distance between the hot air balloon and ... 
pre cal
Tamara is flying in a hot air balloon. The hot air balloon is flying at an altitude of 1100 feet. The ground distance to the landing site is 1400 feet. What is Tamara's angle of depression to the landing site? What is the actual distance between the hot air balloon and the... 
pre cal
an airplane is flying at an altitude of 2500 feet parallel to the ground, and the ground distance to the start of the airport runway is 7500 feet. What s the plane's angle of depression to the start of the runway? What is the distance between the airplane and the airport ... 
pre cal
assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach? 
pre cal
assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach? 
pre cal
if a 22 inch tire rotates 40 times per 2 minutes, determine the linear and angular speed of the tire. 
MATH
Which of the following normal distributions has the smallest spread? A. A normal distribution with mean 1 and standard deviation 3 B. A normal distribution with mean 0 and standard deviation 2 C. A normal distribution with mean 3 and standard deviation 2 D. A normal ... 
biology
what is cell history 
physics
You pull upward on a stuffed suitcase with a force of 100 N, and it accelerates upward at 0.816 m/s2. (a) What is the mass of the suitcase?