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Questions Asked on April 15, 2013

What is the balanced formula for Solid iron 3 oxide reacts with hydrogen gas to form solid iron and liquid water?
1. 4 answers
2. asked by sarai
3. 14,942 views
1.Which of the following would not be a good strategy for delivering a speech? Make sure your presentation equipment is running
1. 24 answers
2. asked by Cassie
3. 10,813 views
Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium
1. 2 answers
2. asked by Lexi
3. 7,589 views
What are the approximate solutions of 2x^2 -x + 10 = 0In working this, I came up with a negative (-79) under the radical sign.
1. 14 answers
2. asked by Jane
3. 5,610 views
A voltaic cell that uses the reactionTl3+(aq) + 2 Cr2+(s) �¨ Tl+(aq) + 2 Cr3+(aq) has a measured standard cell potential of
1. 3 answers
2. asked by sarah
3. 4,914 views
From a survey of 100 college students, a marketing research company found that 60 students owned iPods, 50 owned cars, and 20
1. 1 answer
2. asked by Denise
3. 4,876 views
the ratio of circumference of a circle to its diameter is 22:7. what is the circumference of a curcle of the diameter 15.6m?
1. 9 answers
2. asked by Silvanus
3. 4,276 views
net ionic equations for Ca(NO3)2 +NaPO4
1. 1 answer
2. asked by chris
3. 4,212 views
The sum of two opposite angles of a parallelogram is 150 degree .find the measure of each of its angles.
1. 4 answers
2. asked by anoynomous
3. 3,712 views
A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill, as the drawing illustrates.
1. 1 answer
2. asked by Anonymous
3. 3,610 views
A transistor radio operates by means of a 9.0 V battery that supplies it with a 40 mA current.(a) If the cost of the battery is
1. 1 answer
2. asked by Billy
3. 3,168 views
Some herbicides, such as 2, 4-D are believed to make plant cells divide more rapidly than normal. Why would this kill plants?
1. 3 answers
2. asked by Josh
3. 2,828 views
An electric space heater draws 15.5 A from a 120 V source. It is operated, on the average, for 4.0 h each day.(b) How much
1. 1 answer
2. asked by Billy
3. 2,690 views
Rob colored 1/4 of a rectangle. What is another way to name 1/4?
1. 7 answers
2. asked by Quan
3. 2,591 views
Suppose that x=x(t) and y=y(t) are both functions of t. If x^2+y^2=26 and dx/dt=−2 when x=1 and y=5, what is dy/dt?help??????
1. 1 answer
2. asked by june
3. 2,458 views
A current of 3.78 A is passed through a Pb(NO3)2 solution for 1.40 hours. How much lead is plated out of the solution?
1. 1 answer
2. asked by Andrew
3. 2,249 views
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point
1. 1 answer
2. asked by george
3. 2,064 views
1) For the following electrochemical cell Cu(s)|Cu2 (aq, 0.0155 M)||Ag (aq, 1.50 M)|Ag(s) write the net cell equation.Calculate
1. 1 answer
2. asked by Andrew
3. 1,996 views
3). The shaded region is bounded by the y-axis and the graphs of y=1+√x, y=2. Find the volume of the solid obtained by
1. 1 answer
2. asked by Sally
3. 1,977 views
A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half
1. 1 answer
2. asked by Billy
3. 1,863 views
A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V.(a) What is
1. 1 answer
2. asked by Billy
3. 1,829 views
only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction
1. 1 answer
2. asked by Melanie
3. 1,626 views
how to do pre algebra pizzazz page e 28
1. 4 answers
2. asked by drew
3. 1,592 views
Consider a digital clock. The first time after midnight when the three digits are all prime numbers is 2:22 am. What is the last
1. 1 answer
2. asked by Ian
3. 1,556 views
Triangle ADE is inside rectangle ABCD. Point E is half way between points B and C on the rectangle. Since AB is 8 cm and side AD
1. 2 answers
2. asked by natalie
3. 1,520 views
36.A 50.0-kg block and 100-kg block are connected by a string. The pulley is frictionless and of negligible mass. The
1. 4 answers
2. asked by Noor
3. 1,490 views
A baseball player swings and hits a pop fly straight up in the air to the catcher. The height of the baseball in meters t
1. 2 answers
2. asked by Anonymous
3. 1,421 views
The cash payments journal used in this problem has only three special amount columns. Under what circumstances would you
1. 2 answers
2. asked by Jady
3. 1,408 views
Car A negotiates a curve of 60 m radius at a constant speed of 50 km/h. When A passes the position shown, car B is 30 m from the
1. 1 answer
2. asked by nelly
3. 1,365 views
Rick has a credit card that charges 19% interest compounded monthly. What is the true annual rate of interest for Rick's credit
1. 1 answer
2. asked by Anonymous
3. 1,311 views
how does an increase in pressure affect the following reaction? C2H2(g)+H2(g) C2H4(g)
1. 1 answer
2. asked by Anonymous
3. 1,282 views
What is the molality of a solution which contains 20.0 g of cane sugar, C12H22O11 dissolved in125g of water?
1. 1 answer
2. asked by george
3. 1,269 views
A bag contains 10 red marbles, 10 green marbles, 10 yellow marbles and 10 blue marbles. You reach into the bag and grab a
1. 3 answers
2. asked by Ian
3. 1,268 views
using the compound interest formula find the principal that will yield a compound interest of n$410 in 2 years at therate of 5 %
1. 1 answer
2. asked by Toni
3. 1,264 views
A pinball machine has a spring with spring constant of 125N/m. A 65g ball is placed on the spring and the spring is compressed
1. 0 answers
2. asked by Sash
3. 1,241 views
A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp
1. 0 answers
2. asked by Anonymous
3. 1,238 views
If the Kb of a weak base is 1.5 × 10^-6, what is the pH of a 0.25 M solution of this base?I found that I need to use the
1. 2 answers
2. asked by Leah
3. 1,223 views
A cone has a circular base, a perpendicular height equal to 21cm, and a semi-vertical angle of 30degrees. Calculate the slant
1. 3 answers
2. asked by Londie munyai
3. 1,212 views
If 100.0 g of water at 90'C is added to 50.0 g of water at 10'C, estimate the final temperature of the water. explain your
1. 2 answers
2. asked by Perrie E.
3. 1,157 views
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point
1. 0 answers
2. asked by george
3. 1,153 views
A highway makes an angle of 6 with the horizontal.This angle is maintained for a horizontal distance of 5 miles.To the nearest
1. 3 answers
2. asked by Karen
3. 1,152 views
Scheherazade, supposedly the author of 1001 Arabian Nights, avoided execution by entertaining her husband, a king, each night
1. 2 answers
2. asked by Tianna
3. 1,138 views
name two community organizations that are involved in supporting or giving redress to ill health on water population
1. 2 answers
2. asked by sandile
3. 1,121 views
1)--------practice in the south of borrowing the money necessary to plant a crop against that future crop.The money was loaned
1. 1 answer
2. asked by joy
3. 1,115 views
Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted.
1. 1 answer
2. asked by Kimberly
3. 1,096 views
An activation energy of 2.0 eV is required to form a vacancy in a metal. At 800¡èC there is one vacancy for every 10^-4 atoms.
1. 0 answers
2. asked by ali
3. 1,077 views
Draw a flow-chart and Write a program that asks the user to enter students grades. The program should stop reading when the use
1. 0 answers
2. asked by alhan
3. 1,065 views
The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a
1. 1 answer
2. asked by Stacey
3. 1,061 views
How many integer values x satisfy the inequality 2<3x−1/6<5?
1. 2 answers
2. asked by Ian
3. 1,048 views
The L-shaped object in the figure below consists of three masses (m1 = 8.90 kg, m2 = 1.16 kg and m3 = 2.40 kg) connected by
1. 1 answer
2. asked by Anonymous
3. 1,042 views
if the last digit of a weight measurement is equally likely to be any of the digits 0 through to 9.what is the probability that
1. 1 answer
2. asked by kayla
3. 1,041 views
A 2.4-kg cart is rolling along a frictionless, horizontal track towards a 1.3-kg cart that is held initially at rest. The carts
1. 0 answers
2. asked by Anonymous
3. 1,035 views
The Ehrenberg equation gives the relationship between the weight W (in kilograms) and the height h (in meters) of a child
1. 5 answers
2. asked by Deen
3. 1,021 views
What is the vapor pressure at 23 ¢ªC of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor
1. 1 answer
2. asked by george
3. 1,020 views
In which case is heat involved: mixing 100.0-g samples of 90'C water and 80'C water or mixing 100.0-g samples of 60'C water?
1. 1 answer
2. asked by Perrie E.
3. 1,017 views
Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home
1. 3 answers
2. asked by Joe
3. 1,001 views
1. How should Cathay develop and market its global im-age without diminishing its local/regional identity as the Hongkong (and
1. 1 answer
2. asked by wendy
3. 993 views
In the reaction,K2Cr2O7 +14 HCl ----> 2KCl + 2CrCl3 + 3Cl2 + 7H2O how many moles of HCl act as reducing agent in balanced
1. 1 answer
2. asked by Clandestine
3. 984 views
A solenoid is 3.2 m long and has 500 turns per meter. What is the cross-sectional area of this solenoid if it stores 0.32 J of
1. 1 answer
2. asked by Valerie
3. 981 views
An object with a charge of +6.0 µC is 0.30 m from a second object and experiences an attractive force of 1.80 N. What is the
1. 0 answers
2. asked by traevon
3. 976 views
1.You notice green scum floating on the surface of a pond. How can you tell whether these organisms are plants?2.Explain, using
1. 1 answer
2. asked by CONATY
3. 973 views
Idemtify 3 enviromental health hazards that causes ill health,accidents,crises and disaster within a community in South Africa
1. 0 answers
2. asked by Gift
3. 970 views
What do you consider to be the most important features of an effective communication? Explain your choices
1. 5 answers
2. asked by cathy
3. 953 views
A gas occupies a volume of exactly 500mL at STP. What would it occupy at exactly 70 degrees celsius and 400 mm of pressure?
1. 1 answer
2. asked by Lidia
3. 946 views
A forest ranger spots a fire from a 28- foot tower.The angle of depression from the tower to the fire is 11.To the nearest
1. 1 answer
2. asked by Karen
3. 936 views
he War of 1812- also called the second The war of American Independence or by its opponents the derisive 1 (----) . U.S.declared
1. 6 answers
2. asked by joy
3. 927 views
An economist wants to estimate the mean income for the first year of work for collegegraduates who majored in biology. How many
1. 1 answer
2. asked by Panther
3. 927 views
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly
1. 0 answers
2. asked by Anonymous
3. 914 views
Give an example of an equation and its solution.
1. 1 answer
2. asked by Montereus
3. 909 views
The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a
1. 1 answer
2. asked by John
3. 901 views
Write the name and chemical formula of an amphoteric ion.
1. 1 answer
2. asked by alex
3. 899 views
"New World" by N. Scott Momaday.What might the three times of day represent?
1. 0 answers
2. asked by Anonymous
3. 895 views
A bag contains 5 green marbles, 3 yellow marbles and 2 red marbles. What is the probability of picking three green marbles from
1. 2 answers
2. asked by meoow
3. 877 views
what is 63% rounded to the nearest whole percent.
1. 5 answers
2. asked by meka
3. 871 views
a piece of gold is heated to 100 degrees celsius. A piece of copper is chilled in an ice bath to 0 degrees celsius. Both pieces
1. 1 answer
2. asked by Anonymous
3. 868 views
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be
1. 0 answers
2. asked by george
3. 852 views
8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the cross-section perpendicular to the y-axis is a square. Set
1. 0 answers
2. asked by Sally
3. 847 views
Vector A is described as having magnitude -7 and angle 30degress. Which is an equivaent statement of magnitude and angle of
1. 1 answer
2. asked by Eaden
3. 841 views
5). Find the volume of the solid of revolution generated by rotating the graph of y=8 lnx about the y-axis between y=0 and y=16A
1. 1 answer
2. asked by Sally
3. 840 views
Her gaze was a laser to his heartthis metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him
1. 3 answers
2. asked by Anonymous
3. 834 views
Reasoning: The equation3x^2 + bx + 3 = 0 has one real solution. What must be true about b? I think it is: b must be the same as
1. 1 answer
2. asked by Jane
3. 833 views
he War of 1812- also called the second war of American Independence or by its opponents the derisive (----) . U.S.declared war
1. 2 answers
2. asked by joy
3. 789 views
If a small stream of liquid A was strongly deflected by a charged object, liquid B was moderately deflected, and liquid C was
1. 2 answers
2. asked by Faith. (pls Help
3. 784 views
A specific study found that the average number of doctor visits per year for people over 55 is 8 with a standard deviation of 2.
1. 1 answer
2. asked by Cam
3. 780 views
Find the distance d(P1,P2) between the points P1 and P2P1=(-1,5);P2=(2,4) d(P1,P2)=
1. 1 answer
2. asked by Mary
3. 776 views
Benzene is a hydrocarbon that is commonlyused as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the
1. 0 answers
2. asked by Anonymous
3. 774 views
radioactive sodium chloride is appropriate for diagnosing circulatory problems, but radioactive xenon is helpful in searching
1. 4 answers
2. asked by Sara
3. 773 views
A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?
1. 2 answers
2. asked by Moyer
3. 772 views
A 50g tennis ball is thrown with a velocity of 12 m/s. It strikes a wall and rebounds with a velocity of 10 m/s.a) What is the
1. 0 answers
2. asked by Jack
3. 768 views
The quadratic formula and the discriminat.The daily production of a company is modeled by the function p=-w^2 + 75w - 1200. The
1. 3 answers
2. asked by Jane
3. 768 views
Janine made a cylindrical vase in which the sum of the lateral area and area of one base was about 3000 square centimetres.The
1. 1 answer
2. asked by Karen
3. 760 views
Choose the equation that could be used to find three consecutive integers whose sum is 99
1. 3 answers
2. asked by Montereus
3. 759 views
The question I am having trouble with is:Scientists originally were uncertain whether the oxygen gas produced during
1. 1 answer
2. asked by Madison
3. 753 views
Rewrite the paragraph below, correcting errors in verb usage.(1) History books have learned us many facts about Sir Francis
1. 2 answers
2. asked by Anonymous
3. 748 views
3. Fish have a two chambered heart called a single loop. discuss the benefits and drawbacks of this system.4. Amphibians have a
1. 3 answers
2. asked by SOMEONE HELP THIS PERSON
3. 745 views
The number of moles of KMnO4 required to react with 5 moles of H2O2 in acidic medium is ?
1. 2 answers
2. asked by Clandestine
3. 741 views
Find two negative numbers such that the sum of their squares is 170 and twice the square of the first minus 3 times the square
1. 1 answer
2. asked by aaron
3. 719 views
Given: f(closure(A)) subset of closure(f(A))Prove: For any closed set A in Y, f^-1(A) is closed in X (AKA f is continuous) X and
1. 0 answers
2. asked by gemma
3. 716 views
the perimeter of a rectangular field is 140m. If the length is increased by 15m and the breadth is decreased by 5m, the length
1. 2 answers
2. asked by Toni
3. 714 views
Two wires parallel to each other and separated by a distance d carry different currents; they exert a force with magnitude F on
1. 0 answers
2. asked by physics
3. 714 views

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