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Questions Asked on October 26, 2011

If 0.274 moles of a substance weighs 62.5g, what is the molar mass of the substance?62.5/0.274 = 228.1 Am I on the right track?
1. 1 answer
2. asked by Izzie
3. 6,717 views
Once a 15 kg crate is in motion on a horizontal ﬂoor, a horizontal force of 51 N keeps the crate moving with a constant
1. 5 answers
2. asked by Jack
3. 6,617 views
A right pyramid on a base 4cm square has a slant edge of 6cm.calculate the volume of the pyramid
1. 8 answers
2. asked by Vivian
3. 5,000 views
use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g)
1. 1 answer
2. asked by jen
3. 4,006 views
what is the coefficients on Oxygen in the balanced equation for the following hydrocarbon combusion reactionC7H14 + O2 = CO2 +
1. 2 answers
2. asked by Doss
3. 3,516 views
Determine the concentration of a NaOH solution if 27.80mL of NaOH is required to neutralize 10.00mL of a 1.00 M H2SO4 solution.
1. 9 answers
2. asked by Hannah
3. 3,154 views
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:CaO(s) + H2O(l) �¨ Ca(OH)2(s) In a
1. 2 answers
2. asked by Jess
3. 2,938 views
for the reaction system H2 + X2 <->2HX Kc = 24.4 at 300 K a system made up fron these components which is at equilibrium
1. 7 answers
2. asked by HELPP
3. 2,930 views
algebra 2 trig: A food vendor at a stadium sells hot dogs for $2. At this price, she can sell about 500 hot dogs per day. For
1. 2 answers
2. asked by Steve
3. 2,806 views
Joel sells ice cream cones at the county fair. he has to rent the equipment for $49 and spend $.043 on ingredients for each one.
1. 3 answers
2. asked by Linda
3. 2,635 views
Gasohol is a fuel containing ethanol (C2H5OH) that burns in oxygen (O2) to give CO2 and water. How many moles of O2 are needed
1. 1 answer
2. asked by Deborah
3. 2,600 views
which abiotic factor separates marine ecosystems from river ecosystem?A)sunlight B)salt C)sand D)algae
1. 10 answers
2. asked by miki
3. 2,580 views
Calculate the volume and curved surface area of a cone 14cm in base diameter and 24cm high
1. 9 answers
2. asked by Vivian
3. 2,541 views
Find the values of x and y that maximize or minimize the objective function.x+y < or equal to 8 2x+y < or equal to 10 x> or
1. 2 answers
2. asked by LaH
3. 2,400 views
For what values of x will the angle be acute? (2x-6)degrees
1. 2 answers
2. asked by Alyssa
3. 2,301 views
A pig eats nuts,berries,fungi and insects.What type of consumer is a pigA)producer B)consumer C)omnivore D)decomposer
1. 5 answers
2. asked by miki
3. 2,264 views
If the OH ion concentration in an aqueous solution at 25 celsius is 3.4x10^-3 M the the H concentration in moles per liter in
1. 4 answers
2. asked by HELPP
3. 2,251 views
an autographed baseball rolls off of a .70m high desk and strikes the floor .25m away from the base of the desk. How fast was it
1. 1 answer
2. asked by rolando
3. 2,230 views
A solution consisting of water and ethanol is found to have a refractive index of 1.3541 at 20 degrees C. The refractive indices
1. 1 answer
2. asked by Omar
3. 2,218 views
An air traffic controller spots 2 planes at the same altitude converging on a point as they fly at right angles to each other.
1. 2 answers
2. asked by Alexis
3. 2,210 views
Which of the following are linear equations in x1, x2 and x3?(a) x1 + 5x2 − (2^0.5)x3 =1 (b) x1 + 3x2 + x1.x3 = 2 (c) x1 =
1. 2 answers
2. asked by Matt
3. 2,153 views
A student made a determination of the empirical formula ot tungsten oxide (WO) produced by the total ignition of air of a smaple
1. 2 answers
2. asked by Izzie
3. 2,020 views
write each of the following as trigonometric ratios of acute angles.(a)sin160 degrees (b)cos 310 degrees (c)tan 200 degrees
1. 1 answer
2. asked by chrystabelle
3. 1,978 views
A farmer has 120 feet of fencing available to build a rectangular pen for her pygmy goats. She wants to give them as much room
1. 3 answers
2. asked by By Lana
3. 1,968 views
The coefficient of static friction between the m = 2.95-kg crate and the 35.0° incline is 0.345. What minimum force must be
1. 4 answers
2. asked by Lala
3. 1,966 views
a random sample of 42 college graduates who worked during their program revealed that a student spent an averge of 5.5 yeas on
1. 2 answers
2. asked by Dalila
3. 1,943 views
use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g)
1. 6 answers
2. asked by jen
3. 1,935 views
A 170 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 53 m below
1. 1 answer
2. asked by lynn
3. 1,852 views
Reggie has a sample of raw sugar made up of large particles and a sample of white sugar made up of much smaller particles. He
1. 5 answers
2. asked by Regina ?????????
3. 1,828 views
At 60 celsius the value of Kw is 9.5x10^-14. considering this waht is the calculated value for the pOH of a 2.00x10^-3 M HCL
1. 2 answers
2. asked by HELPP
3. 1,722 views
the following titration data were collected: a 10 mL portion of a unknown monoprotic acid solution was titrated with 1.12340 M
1. 2 answers
2. asked by Doss
3. 1,633 views
farmer montague raises chicken and goats. she is not sure how many she of each animal. but she does know she has 22 animals all
1. 2 answers
2. asked by rhea
3. 1,602 views
Potential energy and kinetic energy are formsof what kind of energy? 1. mechanical 2. nuclear 3. heat 4. electromagnetic 5.
1. 1 answer
2. asked by lynn
3. 1,564 views
A survey organization takes a simple random sample of 625 households from a city of 80,000 households. On the average, there are
1. 3 answers
2. asked by Joyann
3. 1,555 views
A ball rolls off of a table with a speed of 2 m/s. The table is 1.2 m high. How long will it take to the ball to hit the ground?
1. 3 answers
2. asked by kimberly
3. 1,538 views
Show, with equations, why the solution from which BaSO4 is precipitated cannot be allowed to be more than 0.01-0.05M in HCl.
1. 2 answers
2. asked by Anonymous
3. 1,462 views
In the Formula...Na+ + NO2- + HSO3NH2 -> HSO4- + H2O + N2 + Na+ which I know has a 1:1 ratio, How do I figure out the Moles of
1. 5 answers
2. asked by Nadia
3. 1,456 views
1. if 15.0mL of 4.5 M NaOH are diluted with water to a volume of 500mL, what is the molarity of the resulting solution?2. in a
1. 3 answers
2. asked by djella
3. 1,439 views
Four objects are held in position at the corners of a rectangle by light rods . m1 2.90(kg) m2 1.90(kg) m3 4.50(kg) m41.90 (kg)(
1. 1 answer
2. asked by Allie
3. 1,377 views
Four students each added salt crystals to water and measured the time it took for all the crystals to disolve. The following
1. 5 answers
2. asked by Mary Helpppppp
3. 1,335 views
What is the perimeter of a right triangle with legs 6 cm and 3 cm? Leave your answer in simplest radical form.
1. 1 answer
2. asked by ashvini
3. 1,329 views
Consider a stainless steel annular disk with an outer radius 66 mm and inner radius 7.1 mm. The mass of the disk is 1351 grams.
1. 0 answers
2. asked by Anonymous
3. 1,323 views
A movie projector is 6 ft away from the screen showing a rectangular picture that is 3 ft wide and 2 ft high.A. Suppose the
1. 2 answers
2. asked by Colton
3. 1,311 views
It may be difficult to sooth a crying baby who needs to be fed and changed with Cuddling and toys. The strength of the physical
1. 3 answers
2. asked by Sammi
3. 1,279 views
Am having trouble figuring out how to work this problem. We are currently studying about least common multiples.The problem is:
1. 6 answers
2. asked by Brandi
3. 1,269 views
A moving car has kinetic energy.If it speeds up until it is going four times faster than before, how much kinetic energy does it
1. 1 answer
2. asked by lynn
3. 1,261 views
A lamp is suspended by a massless string from the ceiling of a descending elevator which decelerates at 1.6 m/s2. If the tension
1. 0 answers
2. asked by Mark
3. 1,215 views
when one person has the power and authority to make all decisions for the firm it is known as an _______ type of management.a.
1. 3 answers
2. asked by Nile
3. 1,190 views
How did Capitalism change during the Industrial Revolution?
1. 1 answer
2. asked by Savanah
3. 1,185 views
A certain weak base has a Kb of 8.10 × 10-7. What concentration of this base will produce a pH of 10.00?
1. 1 answer
2. asked by Dana
3. 1,170 views
A 16 kg block slides down a frictionless slope which is at angle θ = 20◦. Starting from rest,the time to slide down is t =
1. 0 answers
2. asked by Anonymous
3. 1,168 views
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names
1. 0 answers
2. asked by Tommy
3. 1,145 views
Find all values of a such that y=a/(x−9) and y=x^2−18x+81 intersect at right angles?please how the steps :)
1. 2 answers
2. asked by mehak
3. 1,133 views
Problem 17.6A helium-neon laser beam has a wavelength in air of 633nm . It takes 1.48 ns for the light to travel through 31.0 cm
1. 1 answer
2. asked by Paige
3. 1,128 views
How might social psychology be influenced by cultural factors from one society to another?
1. 1 answer
2. asked by Anonymous
3. 1,121 views
A mass of 30 kg lies on a horizontal surface with a coefficient of static friction of 0.72 and a coefficient of kinetic friction
1. 0 answers
2. asked by Amanda
3. 1,106 views
Find two positive numbers that satisfy the given requirements.The product is 147 and the sum of the first number plus 3 times
1. 1 answer
2. asked by Luke
3. 1,087 views
What was the significance of the Old Age pension plan?The significance of the Old Age pension plan was to acknowledge that
1. 2 answers
2. asked by -Mysterious-
3. 1,078 views
What state has a southwestern border with Colorado and an eastern border with Iowa?
1. 9 answers
2. asked by Jason
3. 1,077 views
find the general solution of the following first order differential equation.u(t): du/dt = u /t+2t pls show all working
1. 1 answer
2. asked by Zane
3. 1,074 views
The student will describe the causes events and results of the French Indian war.The student will explain the economic
1. 10 answers
2. asked by John Jacob Jingle Heimer Smith
3. 1,065 views
Choose a commonly used microprocessor, Intel Core or IBM Power6. What data types are supported? How many bits are used to store
1. 1 answer
2. asked by Mike
3. 1,062 views
what will happen to a red blood cell place in a solution of 99.3% water and 0.7% salt?
1. 1 answer
2. asked by alex
3. 1,031 views
The title states it.Please be gentle. The day started off pretty normal, well, before I was out rocking out to music, besides
1. 3 answers
2. asked by Allyson
3. 1,023 views
The research of Solomon Asch revealed that:a.participants in the study conformed to the erroneous group response in one-half of
1. 1 answer
2. asked by Sammi
3. 1,015 views
1. The on-campus housing costs for a semester at a state university are Normally distributed witha mean of $1553 and a standard
1. 1 answer
2. asked by Sarah
3. 1,013 views
an adult exerts a force of 26n to pull a child across the snow on a sled. The rope joins the sled at an angle of 30 degrees
1. 2 answers
2. asked by LaToya
3. 1,013 views
I need to find the ratio of the longest side to the length of the shortest side, then write each fraction in lowest terms. Both
1. 1 answer
2. asked by Alex L.
3. 1,005 views
It’s OK to say that your brain is solar powered, becauseA) mitochondria in plant cells convert solar power to the chemical
1. 0 answers
2. asked by Frank
3. 995 views
you could produce a sample containing 2,400,000 free neutrons, what would it be 2658 seconds later?A) 300,000 neutrons,
1. 1 answer
2. asked by Anonymous
3. 991 views
if the radius of a metal hoop that surrounds a silo were to expand by 1.00 m, the circumference of the hoop would increase by
1. 1 answer
2. asked by Debra
3. 989 views
answer to a two column proof problem such as Given: angle 1 and angle 5 are congruent and angle 5 is congruent to angle 4 prove
1. 1 answer
2. asked by mea
3. 967 views
An equalateral triangle has the length of it's sides given as (y+3)cm, (2y-x)cm and (4x +3)cm.Find (a) the value of x and y
1. 2 answers
2. asked by Joseph
3. 965 views
if b is a real number satisfying b^4 + 1/(b^4) = 6, find the value of :-(b + i/b)^16 where i = sqrt of -1
1. 2 answers
2. asked by ...........
3. 964 views
Aldo invested his savings in two investment funds. The $24, 000that he invested in Fund A returned a 1% profit. The amount that
1. 1 answer
2. asked by George
3. 964 views
I need help in a thematic web including an activity plan for the 10 domains. I have sent my homework in three times and I don't
1. 4 answers
2. asked by Maryann
3. 962 views
Find the augmented matrix for each of the following systems of linear equations:(a) 3x1 − 2x2 = −1 4x1 + 5x2 = 3 7x1 + 3x2 =
1. 1 answer
2. asked by Matt
3. 946 views
SIMPLE INTERESTkelsie has an $800 savings bond which she has had for 2 1/2 years. The bond pays simple interest at the rate of
1. 2 answers
2. asked by Name
3. 934 views
block A: mass = 100·g, spring stretched 10·cmblock B: mass = 400·g, spring stretched 20·cm block C: mass = 200·g, spring
1. 0 answers
2. asked by jen
3. 930 views
Two 75.0-kg hockey players skating at 5.75 m/s collide and stick together. If the angle between their initial directions was
1. 0 answers
2. asked by fad
3. 926 views
1. Choose a real or made up example of a company, and describe at least three variable costs the company has
1. 2 answers
2. asked by anthony
3. 923 views
if it is 1 am at 105 degrees west what time will it be at 23 degrees west
1. 2 answers
2. asked by Dee Dee
3. 918 views
the law will not punish an ______ acta. ignorant b. reckless c. involuntary d. premeditated i think its C
1. 1 answer
2. asked by john
3. 917 views
Is the answer D? Thank youThe earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component
1. 8 answers
2. asked by Jason
3. 916 views
It’s OK to say that your brain is solar powered, becauseA) mitochondria in plant cells convert solar power to the chemical
1. 1 answer
2. asked by Frank
3. 905 views
Reggie has a sample of raw sugar made up of large particles and a sample of white sugar made up of much smaller particles. He
1. 1 answer
2. asked by Regina
3. 900 views
4.00 g dm^-3 of impure sodium carbonate is used in a titration. What could have caused the impurity in the sodium carbonate?
1. 5 answers
2. asked by ?
3. 894 views
Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how
1. 1 answer
2. asked by Mary
3. 892 views
Find the values of the other five trigonometric functions for angle S.a) cos S=1/3 and the terminal side of angle S is in Q1. b)
1. 1 answer
2. asked by Chelci
3. 887 views
A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.30. Its velocity at point A is 7.6
1. 1 answer
2. asked by Me
3. 870 views
"I'm thirty five years old; I been married eleven years and i got a boy who sleeps in the living room-and all i got to give him
1. 1 answer
2. asked by FITTY
3. 862 views
When carbon in the form of diamond is burned to produce CO2, more heat is given off than when carbon in the form of graphite is
1. 1 answer
2. asked by Sheryl
3. 858 views
Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL
1. 1 answer
2. asked by Ashley(please help!!!!)
3. 850 views
find the general solution of the following first order differential equation.u(t): du/dt =(u/(t+2t)) pls show all working
1. 0 answers
2. asked by Zane
3. 844 views
I tried to re-write the essay please check it for me again .Thank you Sra Antigone and Whale Rider In the play Antigone by
1. 1 answer
2. asked by manal
3. 833 views
Complete the following sentence with the best possible answer.1. Abraham Lincoln warned us that "America will never be destroyed
1. 4 answers
2. asked by Anonymous
3. 826 views
Determine the total in Dexter's account after the second month using the information below.Dexter Banler's account Principal:
1. 0 answers
2. asked by morgan
3. 826 views
Consider a frictionless track as shown in the figure below. A block of mass m1 = 5.75 kg is released from A. It makes a head on
1. 0 answers
2. asked by Ellen
3. 822 views
Suppose you are a stock market analyst specializing in the stocks of theme parks, andyou are examining Disneyland’s stock. The
1. 0 answers
2. asked by Beverly
3. 815 views
For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium
1. 3 answers
2. asked by Hannah
3. 815 views

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