jorge
Most popular questions and responses by jorge
Chemistry
In one experiment, 7.62 g of Fe are allowed to react with 8.67 g of S. What is the limiting reagent, what is the mass of FeS formed, and how much excess reagent is left, respectively? I am not sure how to solve this. I started by doing (7.62 g Fe/55.85
asked on September 14, 2015 
Chemistry
What is the minimum volume of 2.6 M HBr required to completely dissolve 35.0 g of potassium metal?
asked on November 14, 2015 
chemistry
ow many grams of aluminum chloride must decompose to produce 78.3 milliliters of aluminum metal, if the density of aluminum is 2.70 g/mL? Show all steps of your calculation as well as the final answer. (5 points) AlCl3 → Al + Cl2
asked on November 3, 2014 
Science
solve the system of equations algebraically. show all your steps. y=x^2+2x y=3x+20 Can someone show me step by step on how to get the answer it's, there are answers like this that is going to be on my math test and I don'tget it.
asked on May 11, 2018 
Physics
The occupants of a car traveling at a speed of 30 m/s note that on a particular part of a road their apparent weight is 15% higher than their weight when driving on a flat road. a. Is that part of the road a hill or a dip? b. What is the vertical curvature
asked on December 30, 2016 
algebra
Anita and Maria went to the candy store. Maria bought 5 pieces of fudge and 3 pieces of bubble gum for a total of $5.70. Anita bought 2 pieces of fudge and 10 pieces of bubble gum for a total of $3.60. Determine the cost of 1 piece of bubble gum.
asked on May 1, 2012 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?
asked on November 15, 2015 
Chemistry
What minimum volume of 14.0 M hydrochloric acid would be required to completely dissolve a 600.0 −g iron bar? I'm getting around 2.3 L but it's saying it's incorrect...
asked on November 18, 2015 
science
suppose you are standing on a sidewalk . describe your motion relative to the car and the plane
asked on April 19, 2013 
us history
how did the fear of alienating the border states affect nothern strategy during the war? President Lincoln is "reported to have said that he hoped to have God on his side, but he had to have Kentucky." That's from this article:
asked on August 4, 2007 
Physics
You are pulling a suitcase through the airport at a constant speed. the handle of the suitcase makes an angle of 45 degrees with respect to the horizontal direction. if you pull with a force of 7.5N parallel to the handle, what is the force of friction
asked on September 15, 2010 
college algebra
A toy rocket is launched with an initial velocity of 44.1 meters per second from a 1 meter tall platform. The height h of the object at any time t seconds after launch is given by the function h (t)4.9t squared +44.1t +1. How long after launch did it take
asked on June 25, 2017 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?
asked on November 15, 2015 
Math Calc
If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 112 ft/sec, its height after t seconds is s(t)=48+112t–16t^2. What is the maximum height the ball reaches "in ft"?What is the velocity of the ball when it hits the
asked on May 1, 2015 
Physics
A quarterback throws a football toward a receiver with an initial speed of 22 m/s at an angle of 30° above the horizontal. At that instant the receiver is 23.6 m from the quarterback. With what constant speed should the receiver run in order to catch the
asked on October 27, 2015 
Physics
A cyclist travels a distance of 1200m due north before going 2000m due east followed by 500m southwest. Draw a scale diagram to calculate the cyclist's final displacement form her initial position?
asked on August 16, 2015 
Microecomics
Assume that American rise sells for $100 per bushel, Japanese rice sells for 16,000 yen per bushel, and the nominal exchange rate is 80 yen per dollar. Explain how you could make a profit from this situation. What would be your profit per bushel of rice?
asked on July 16, 2012 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown substance?
asked on November 15, 2015 
Chemistry
If salicylic acid costs $21 per kilogram, how much would it cost to purchase enough salicylic acid (formula mass= 138.1) to make 1.0 kilogram of aspirin (formula mass= 180.2), assuming your percent yield was obtained in the reaction? (Note 1 to 1 mole
asked on April 2, 2018 
physics
A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff the rock has a speed of 28 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b)
asked on November 29, 2012 
PreAlgebra 7th Grade
I need help with this problem: Suppose you design a second model car that is 1/4 the size of the model car you designed in Excercise 9.What is the perimeter of the license plate on the second model car? Let me explain.The perimeter of the actual car's
asked on March 28, 2011 
trig
Solve triangle ABC. (If an answer does not exist, enter DNE. Round your answers to one decimal place.) a = 63, c = 50, ∠C = 53°
asked on April 19, 2016 
math algebra
Solve the following system using elimination. If a single solution exists, write the solution as an ordered pair. Your answer will be an ordered pair, no solution, or infinitely many solutions. a+b=4 2a3b=2
asked on May 3, 2012 
physics
No glass is perfectly transparent. Mainly because of reflections, about 94% of light passes through an average sheet of clear windowpane. The 6% loss is not noticed through a single sheet, but through several sheets it is apparent. How much light is
asked on April 5, 2010 
math
guess my rule with two rules
asked on March 22, 2010 
Chemsitry
If salicylic acid costs $21 per kilogram, how much would it cost to purchase enough salicylic acid (formula mass= 138.1) to make 1.0 kilogram of aspirin (formula mass= 180.2), assuming your percent yield was obtained in the reaction? (Note 1 to 1 mole
asked on April 2, 2018 
Regents biology
Baby chickens require a constant source of food.As chick's grow,more energy is required for daily activities.The following table gives the grams of food eaten by a chuck over a five day period:
asked on October 21, 2015 
math ,confused
The question is : Bath towels sell for $13.25 each, while hand towels sell for $4.50 each. Theresa buys some of each type of towel for a total of $62.25. If she spends $17.25 more on hand towels, how many of each type does she buy ? oh never mind I found
asked on March 4, 2007 
Math
Hank buys his dog food in bulk. He recently just bought a 5 lb. bag of food. If he uses a scooper that holds 1/8 of a cup of food, how many days can he feed his dog?
asked on April 10, 2018 
Physical Geography
Assume that a parcel of air is forced to rise up and over a 6000foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and
asked on January 20, 2014 
English
What is the difference between antimetabole and chiasmus?
asked on June 19, 2013 
Physics
im trying to study for my exam by doing problems, however im stuck with this one. any help is appreciated In doing a load of clothes, a clothes drier uses 16 A of current at 240 V for 59 min. A personal computer, in contrast, uses 2.3 A of current at 120
asked on September 26, 2012 
math
The sum of the 3 angles of a triangle is 180 degrees. In triangle PQR, the largest angle is twice the size of the smallest angle. The remaining angle is 16 degrees larger than the smallest. Write and solve an equation to find the size of the smallest angle
asked on April 5, 2012 
Physic
Given that the distance between the Earth and the Moon is d = 3.84 108 m, show that a satellite located exactly inbetween the Earth and the Moon at a distance of 90% d from the Earth experiences no net force (at least when only the gravitational
asked on March 26, 2009 
math
on a map, the key indicates that 2.5 centimeters equals 10 miles. a road on the map runs for 30 centimeters. how long is the road?
asked on January 31, 2015 
Biochemistry
Give the sequence of a reverse primer used to insert a BamHI site (GGATCC) at the 3' end of the following sequence: 5' CTGAACGTCCAAGGCTTAA 3' 3' GACTTGCAGGTTCCGAATT 5' Make sure you indicate your primers polarity.
asked on February 1, 2012 
geometry
The altitude upon the hypotenuse of a right triangle divides the hypotnuse into segments of 3 and 12. find the length of the altitude
asked on February 8, 2011 
Math
Which scale will produce the smallest drawing? A) 1cm: 5m B) 1mm: 50m C) 5cm: 10m D) 10cm: 25m
asked on December 19, 2017 
Math
Of 1901 people who came into a blood bank to give blood, 315 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure
asked on April 1, 2015 
physics
a warehouse employee is pushing a 38 kg desk across a floor at a constant speed of 0.4 m/s. How much work must the employee do on the desk to change the speed of 1.5m/s?
asked on November 2, 2014 
Geometry
Given that the ratios of the perimeter of two similar shapes is 3/5, what is the ratio of their perimeters.
asked on June 5, 2014 
math
Anita and Maria went to the candy store. Maria bought 5 pieces of fudge and 3 pieces of bubble gum for a total of $5.70. Anita bought 2 pieces of fudge and 10 pieces of bubble gum for a total of $3.60. Determine the cost of 1 piece of bubble gum.
asked on May 1, 2012 
math
classify each statement as sometimes, always, or never true. give examples or properties to support your answer d+ (d)=0
asked on August 17, 2011 
Physics
Starting from rest at 10m to the left of the origin (the starting line of a race), a gokart undergoes constant acceleration of 2.46 m/s2. Make a table calculating the karts position and velocity at 10 second intervals from t=0 to 60 seconds. I have
asked on September 18, 2016 
math
Solve the following system using substitution. Write the solution as an ordered pair, (a, b). b = a – 4 2a – 3b = 2
asked on April 30, 2012 
Chemistry
A volume of 45.3mL of .719 M Ca(NO3)2 solution is mixed with 82.3mL of 1.409M Ca(NO3)2 solution calculate the concentration of the final solution
asked on October 10, 2010 
Algebra 1
slove (8w+2)(w+5)
asked on May 12, 2010 
MATH
9.3 X 10^5
asked on February 27, 2009 
Reading Project
I need someone who is a scientist to help me on my reading project. This basically is about how king penguins are being threatened by global warming. If your a scientist it would help me a lot. I just need to interview you and find more about King Penguins
asked on May 2, 2008 
Math
A person has $5 and $10 bills. In total they have 26 bills that equal to $210.
asked on December 9, 2016 
Algebra
Henry purchased x apples; Jack purchased 10 less than 1/3 of apples Henry purchsed
asked on June 22, 2016 
Math
Sue's Organic sells a 24ounce jar of peanut butter that costs 5 less per ounce than their 16ounce jar. What is the total price of their 24ounce jar of peanut butter?
asked on January 12, 2016 
math
If Joe throws a pair of sixsided dice and records the sum of the first throw, how many more times must Joe throw the dice to ensure that he records the same sum as the first throw?
asked on September 5, 2012 
physics
A ball is thrown at a rate of 25m/s. The ball travels 138 meters. How long does it take the ball from start to end?
asked on February 20, 2012 
math
what question can i make with a picture that has 2 triangles,3 quadrilateral,and 4 pentagons?the answer is 38.
asked on May 26, 2011 
math
Mr.kale received 4000 votes,Mrs. Chalker received 6000 votes,and Mr.rains received 1/3 of the votes. What was the total number of votes casted
asked on January 9, 2011 
MATH
Addition of Polynomials (w^2 2w+1) + (2w5+w^2)
asked on March 2, 2009 
solar energy
If the price for Wp of a PV panel is €1 and the external costs are €400, and considering an efficiency of electricity to heat conversion of 85%, how much (in €) will it cost to cover 5805 W of energy with PV technology?
asked on January 18, 2017 
physics
A force is applied to a 3 kg mass and produces 5 m/s 2 acceleration. What acceleration would be produced by the same force applied to a 12.2 kg mass? Answer in units of m/s 2 .
asked on December 4, 2016 
math
Find all numbers that are not in the domain of the function. Then give the domain using set notation? F(x)=________17over xSquare+4x12
asked on April 13, 2014 
Algebra
Maria and Charlie can deliver 50 papers in 2 hours. How long would it take them to deliver 35 papers? formula please
asked on April 5, 2014 
math
11/1612/16
asked on June 8, 2013 
physics
a40w motor conectedto a 9v battery can lift an object 40m in 10s
asked on March 21, 2013 
College Algebra
The parking lot is 25 by 40 feet. The owner wants to enlage the parking lot by paving an equal width strip on the north side and east side of the lot, sot hat the new lot will be twice the area of the old one. Find the equation which has as a root the
asked on May 2, 2012 
MATH
A name tag is 6.7 centimeters long. How many meters long is it
asked on March 5, 2012 
math
i need help here is the question. Leena bought 93 yards of wire. How many of wire did she buy
asked on March 5, 2012 
Physics
1) An 8.5kg bowling ball dropped 11m hits the ground 1.5 seconds later. What is the magnitude of the force acting on the ball during the fall? 2) Shuttle astronauts climb at a rate of 24.5m/s^2 shortly after takeoff. What apparent weight would a 95kg
asked on December 22, 2011 
English
Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours? Visit the Calvinism
asked on September 15, 2011 
Algebra
factor the expression x(a+2)  2(a+2) i missed this day because i was sick...please explain!
asked on November 17, 2009 
Microbio
Please write a one paragraph abstract arguing for or against one of the following statements: Hormone replacement therapy is carcinogenic Water fluoridation causes bone cancer Regulation of carcinogens should take hormesis into account Aneuploidy, not
asked on March 26, 2009 
Physics
Given that the distance between the Earth and the Moon is d = 3.84 x 10^8 m, show that a satellite located exactly inbetween the Earth and the Moon at a distance of 90% d from the Earth experiences no net force (at least when only the gravitational force
asked on March 26, 2009 
MATH
9.3 X 10^5 This is a question...
asked on February 27, 2009 
Social Studies
What was the substance used to stuff in the mummy's nostrils?
asked on January 13, 2008 
science
Which of Newton’s laws says that a net force acting on an object causes the object to accelerate in the direction of the force?
asked on October 24, 2007

Math
77
posted on June 5, 2018 
Science
Sorry for my spelling, rushed it.
posted on May 11, 2018 
Chemistry
Still have no clue what goes where!
posted on April 3, 2018 
Chemsitry
Yes, really didn't know how to set it up.
posted on April 2, 2018 
geometry
nonof the above only Call of duty black ops 4 is coming out on September 2 2018.
posted on March 23, 2018 
American government
YESMAN is the fu**ing man
posted on April 5, 2017 
math
Yuron is sketching a scale drawing of a famous painting. The painting is 54 inches wide and 72 inches long. He used a scale factor of 2/3 to make his sketch. How many inches wide is Yuron’s sketch?
posted on February 17, 2017 
Physics
Please answer quick
posted on December 30, 2016 
Spanish 2
Les
posted on November 16, 2016 
chemistry
idk
posted on November 14, 2016 
science
b
posted on September 21, 2016 
chemistry
64
posted on September 2, 2016 
Chemistry
1.3 x 10^22
posted on July 13, 2016 
math 5 grade
Write the longest multiplication combination you found for each of these numbers
posted on April 27, 2016 
Math
5400
posted on March 22, 2016 
chemistry
How many grams of HCL are required to produce 224 liters of CL2at stp
posted on March 1, 2016 
Differentials (calc)
Hello, everybody let's get started
posted on December 7, 2015 
Social Studies
..
posted on September 29, 2015 
Geometry
Idk Idk idk
posted on September 17, 2015 
math
0=240
posted on August 20, 2015 
Calculs I
780000
posted on November 2, 2014 
Physics
The answer is B because, in reality, the force of gravity on astronauts, just depends on their masses which do not change, though the spacecraft is subjected to an acceleration upward. Due to the acceleration of the spacecraft, is exerted on the astronaut
posted on July 2, 2014 
common factors
you forgot to put the answer for 24/84
posted on March 15, 2014 
common factors
18/36=2/6,5/7
posted on March 15, 2014 
math
well nevermind ._.
posted on June 20, 2013 
math
The range is basically all the values that can come out from plugging something in (in other words, every answer that the equation can have). In order to find the range, you need to graph this equation. Once you have the graph, find which point the
posted on June 20, 2013