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April 15, 2013
What is the balanced formula for Solid iron 3 oxide reacts with hydrogen gas to form solid iron and liquid water?
4 answers
asked by
sarai
14,941 views
1.
Which of the following would not be a good strategy for delivering a speech? Make sure your presentation equipment is running
24 answers
asked by
Cassie
10,813 views
Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium
2 answers
asked by
Lexi
7,587 views
What are the approximate solutions of 2x^2 -x + 10 = 0
In working this, I came up with a negative (-79) under the radical sign.
14 answers
asked by
Jane
5,610 views
A voltaic cell that uses the reaction
Tl3+(aq) + 2 Cr2+(s) �¨ Tl+(aq) + 2 Cr3+(aq) has a measured standard cell potential of
3 answers
asked by
sarah
4,907 views
From a survey of 100 college students, a marketing research company found that 60 students owned iPods, 50 owned cars, and 20
1 answer
asked by
Denise
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?
9 answers
asked by
Silvanus
4,276 views
net ionic equations for Ca(NO3)2 +NaPO4
1 answer
asked by
chris
4,210 views
The sum of two opposite angles of a parallelogram is 150 degree .find the measure of each of its angles.
4 answers
asked by
anoynomous
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 answer
asked by
Anonymous
3,609 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 answer
asked by
Billy
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?
3 answers
asked by
Josh
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 answer
asked by
Billy
2,688 views
Rob colored 1/4 of a rectangle. What is another way to name 1/4?
7 answers
asked by
Quan
2,590 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 answer
asked by
june
2,454 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 answer
asked by
Andrew
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 answer
asked by
george
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 answer
asked by
Andrew
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 answer
asked by
Sally
1,975 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 answer
asked by
Billy
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 answer
asked by
Billy
1,828 views
only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction
1 answer
asked by
Melanie
1,626 views
how to do pre algebra pizzazz page e 28
4 answers
asked by
drew
1,591 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 answer
asked by
Ian
1,554 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
2 answers
asked by
natalie
1,519 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
4 answers
asked by
Noor
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
2 answers
asked by
Anonymous
1,421 views
The cash payments journal used in this problem has only three special amount columns. Under what circumstances would you
2 answers
asked by
Jady
1,406 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 answer
asked by
nelly
1,363 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 answer
asked by
Anonymous
1,310 views
how does an increase in pressure affect the following reaction? C2H2(g)+H2(g) C2H4(g)
1 answer
asked by
Anonymous
1,281 views
What is the molality of a solution which contains 20.0 g of cane sugar, C12H22O11 dissolved in125g of water?
1 answer
asked by
george
1,268 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
3 answers
asked by
Ian
1,266 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 answer
asked by
Toni
1,263 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
0 answers
asked by
Sash
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
0 answers
asked by
Anonymous
1,237 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
2 answers
asked by
Leah
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
3 answers
asked by
Londie munyai
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
2 answers
asked by
Perrie E.
1,156 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
0 answers
asked by
george
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
3 answers
asked by
Karen
1,151 views
Scheherazade, supposedly the author of 1001 Arabian Nights, avoided execution by entertaining her husband, a king, each night
2 answers
asked by
Tianna
1,137 views
name two community organizations that are involved in supporting or giving redress to ill health on water population
2 answers
asked by
sandile
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 answer
asked by
joy
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 answer
asked by
Kimberly
1,095 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.
0 answers
asked by
ali
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
0 answers
asked by
alhan
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 answer
asked by
Stacey
1,056 views
How many integer values x satisfy the inequality 2<3x−1/6<5?
2 answers
asked by
Ian
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 answer
asked by
Anonymous
1,041 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 answer
asked by
kayla
1,040 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
0 answers
asked by
Anonymous
1,033 views
The Ehrenberg equation gives the relationship between the weight W (in kilograms) and the height h (in meters) of a child
5 answers
asked by
Deen
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 answer
asked by
george
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 answer
asked by
Perrie E.
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
3 answers
asked by
Joe
998 views
1. How should Cathay develop and market its global im-age without diminishing its local/regional identity as the Hongkong (and
1 answer
asked by
wendy
993 views
In the reaction,
K2Cr2O7 +14 HCl ----> 2KCl + 2CrCl3 + 3Cl2 + 7H2O how many moles of HCl act as reducing agent in balanced
1 answer
asked by
Clandestine
983 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 answer
asked by
Valerie
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
0 answers
asked by
traevon
975 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 answer
asked by
CONATY
972 views
Idemtify 3 enviromental health hazards that causes ill health,accidents,crises and disaster within a community in South Africa
0 answers
asked by
Gift
969 views
What do you consider to be the most important features of an effective communication? Explain your choices
5 answers
asked by
cathy
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 answer
asked by
Lidia
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 answer
asked by
Karen
934 views
An economist wants to estimate the mean income for the first year of work for college
graduates who majored in biology. How many
1 answer
asked by
Panther
927 views
he War of 1812- also called the second The war of American Independence or by its opponents the derisive 1 (----) . U.S.declared
6 answers
asked by
joy
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
0 answers
asked by
Anonymous
914 views
Give an example of an equation and its solution.
1 answer
asked by
Montereus
908 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 answer
asked by
John
900 views
Write the name and chemical formula of an amphoteric ion.
1 answer
asked by
alex
899 views
"New World" by N. Scott Momaday.
What might the three times of day represent?
0 answers
asked by
Anonymous
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
2 answers
asked by
meoow
876 views
what is 63% rounded to the nearest whole percent.
5 answers
asked by
meka
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 answer
asked by
Anonymous
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
0 answers
asked by
george
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
0 answers
asked by
Sally
846 views
Vector A is described as having magnitude -7 and angle 30degress. Which is an equivaent statement of magnitude and angle of
1 answer
asked by
Eaden
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=16
A
1 answer
asked by
Sally
840 views
Reasoning: The equation
3x^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 answer
asked by
Jane
832 views
Her gaze was a laser to his heart
this metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him
3 answers
asked by
Anonymous
831 views
he War of 1812- also called the second war of American Independence or by its opponents the derisive (----) . U.S.declared war
2 answers
asked by
joy
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
2 answers
asked by
Faith. (pls Help
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 answer
asked by
Cam
780 views
Benzene is a hydrocarbon that is commonly
used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the
0 answers
asked by
Anonymous
774 views
Find the distance d(P1,P2) between the points P1 and P2
P1=(-1,5);P2=(2,4) d(P1,P2)=
1 answer
asked by
Mary
774 views
radioactive sodium chloride is appropriate for diagnosing circulatory problems, but radioactive xenon is helpful in searching
4 answers
asked by
Sara
773 views
A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?
2 answers
asked by
Moyer
771 views
The quadratic formula and the discriminat.
The daily production of a company is modeled by the function p=-w^2 + 75w - 1200. The
3 answers
asked by
Jane
768 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
0 answers
asked by
Jack
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 answer
asked by
Karen
760 views
Choose the equation that could be used to find three consecutive integers whose sum is 99
3 answers
asked by
Montereus
759 views
The question I am having trouble with is:
Scientists originally were uncertain whether the oxygen gas produced during
1 answer
asked by
Madison
753 views
Rewrite the paragraph below, correcting errors in verb usage.
(1) History books have learned us many facts about Sir Francis
2 answers
asked by
Anonymous
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
3 answers
asked by
SOMEONE HELP THIS PERSON
745 views
The number of moles of KMnO4 required to react with 5 moles of H2O2 in acidic medium is ?
2 answers
asked by
Clandestine
740 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 answer
asked by
aaron
718 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
0 answers
asked by
gemma
714 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
2 answers
asked by
Toni
713 views
Two wires parallel to each other and separated by a distance d carry different currents; they exert a force with magnitude F on
0 answers
asked by
physics
711 views
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