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Questions Asked on September 27, 2014

How do you calculate the mass percent composition of nitrogen in NO2?
1. 1 answer
2. asked by Carlos
3. 7,097 views
Bones are mostly calcium phosphate. Calcium chloride reacts with potassium phosphate to form calcium phosphate and potassium
1. 1 answer
2. asked by mandi
3. 6,516 views
What is the total ionic equation of this:3CaCl2(aq) + 2K3PO4(aq) → Ca3(PO4)2(s) + 6KCl(aq) Shw all physical states of the
1. 1 answer
2. asked by John
3. 5,496 views
Calculate the empirical formula for compoundethyl butyrate (pineapple oil): C, 62.04%; H, 10.41%; O, 27.55% Can someone show me
1. 2 answers
2. asked by Emely
3. 5,375 views
between which two square roots of integers can you find pi?
1. 3 answers
2. asked by Anonymous
3. 4,805 views
Determine the number of moles of H in 4.70mol H2O. Please help I tried different ways to do it and I got them all wrong.
1. 1 answer
2. asked by Oliva
3. 4,239 views
Explain why I2 is not a good primary standard?why is this an iodometric procedure?
1. 1 answer
2. asked by Janu
3. 4,175 views
A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the
1. 3 answers
2. asked by Ariyo
3. 3,935 views
A railroad tunnel is shaped like a semiellipse as shown below.A semiellipse is shown on the coordinate plane with vertices on
1. 1 answer
2. asked by Lisa
3. 3,712 views
Please help!Calculate the standard change in enthalpy, ΔH°rxn, for the decomposition of calcium carbonate to calcium oxide
1. 1 answer
2. asked by Jane
3. 3,614 views
write an integer to represent a loss of 5 yards in football.–7 –5 5 7
1. 1 answer
2. asked by Anonymous
3. 2,373 views
8. In which one of the following sentences is but used as a preposition?A. I would like to return to Italy, but I have no money.
1. 40 answers
2. asked by Sarah
3. 2,344 views
1. How did the Committee of Public Safety identify enemies of the state?A: The Committee of Public Safety indentified enemies of
1. 6 answers
2. asked by Victoria
3. 2,275 views
A satellite of mass 205 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth.(a)
1. 1 answer
2. asked by Dallas
3. 2,254 views
Becka borrowed $100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's
1. 1 answer
2. asked by Luis
3. 2,231 views
Find the sum of the first 60 terms of the arithmetic sequence whose first term is −15 and whose common difference is 7.
1. 1 answer
2. asked by gisela
3. 2,192 views
Air is 78.1% nitrogen, 20.9% oxygen, and 0.934% argon by moles. What is the density of air at 22 °C and 760 torr? Assume ideal
1. 1 answer
2. asked by A
3. 1,984 views
2. Write an integer to represent owing your friend $10.–10 *** –2 2 10 3. Write the sum as a product, then simplify the
1. 4 answers
2. asked by Sally
3. 1,976 views
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide Use this data to calculate the mass
1. 1 answer
2. asked by Luis
3. 1,940 views
Why did the Hittites and others migrate from Central Asia to Mesopotamia?A- They needed more land for growing populations B-
1. 15 answers
2. asked by Amberr
3. 1,900 views
What is the IUPAC name for the molecule shown here?H I \ / C=C / \ I H
1. 5 answers
2. asked by M
3. 1,887 views
What is the correct name of the compound that is incorrectly named 1-chloro-3-pentyne?
1. 1 answer
2. asked by M
3. 1,812 views
A 8.50-g sample of solid AlCl3·6H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior,
1. 1 answer
2. asked by A
3. 1,802 views
the price of a computer fell 20% this year, if the computer now cost $850, how much did it cost last year?
1. 1 answer
2. asked by Barbara
3. 1,776 views
The mass of a robot is 6930 kg. This robot weighs 2520 N more on planet A than it does on planet B. Both planets have the same
1. 3 answers
2. asked by S
3. 1,741 views
13. When an adverb modifies a verb with a helping verb, the adverb should generally be placedA. before the helping verb. B.
1. 10 answers
2. asked by Sarah
3. 1,678 views
The half-life of oxygen-15 is 124 s. If a sample of oxygen-15 has an activity of 4800 Bq, how many minutes will elapse before it
1. 3 answers
2. asked by Anonymous
3. 1,658 views
A geosynchronous satellite is one that appears to be fixed in the sky, a condition useful for telecommunications. If such a
1. 1 answer
2. asked by anna
3. 1,625 views
What is 1/10 of 200?
1. 4 answers
2. asked by Bianca
3. 1,572 views
The barrel of a rifle has a length of 0.97m. A bullet leaves the muzzle of a rifle with a speed of 601m/s. What is the
1. 1 answer
2. asked by emily
3. 1,550 views
A basketball player throws the ball at a 53degree angle above the horizontal to a hoop which is located a horizontal distance L
1. 1 answer
2. asked by karine
3. 1,497 views
a triangle has a perimeter of 126 centimeters, each of the 2 longer sides of the triangle is three times as long as the shortest
1. 1 answer
2. asked by Barbara
3. 1,459 views
X is a normally distributed random variable X with mean 15 and standard deviation 0.25. Find the values xL and xR of X that are
1. 2 answers
2. asked by Anonymous
3. 1,369 views
are the length of a side of a square and the area of the square related proportionally?
1. 1 answer
2. asked by Anonymous
3. 1,336 views
What methods would you use to sterilize and clean a lab coat contaminated with a broth culture of Vibrio cholerae so that the
1. 3 answers
2. asked by Rose
3. 1,285 views
A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.926 m (3.04 ft) by the time it reaches
1. 2 answers
2. asked by kash
3. 1,188 views
The electron in a ground state H atom absorbs a photon of wavelength 121.57nm, to what energy level does the electron move?
1. 2 answers
2. asked by sara
3. 1,170 views
Imagine there is a tank of unknown gas that contains 53.31% carbon, 35.51% oxygen, and 11.18% hydrogen by mass. At 35.0 °C and
1. 3 answers
2. asked by A
3. 1,164 views
A water pump produces 9KL of water per hour at a height of 70 m above the pump.The pump is driven by a 3 KW electric
1. 2 answers
2. asked by Thulani
3. 1,161 views
2NiS2(s)+5O2(g)=2NiO(s)+4SO2(g)1. how many kilograms of NiO would be formed from the reaction of .0125 mol of NiS2? 2. How many
1. 1 answer
2. asked by newsome
3. 1,128 views
A pot with a flower falls out of a window box in a tall apartment building. It passes the top of a particular window with a
1. 1 answer
2. asked by Jane
3. 1,095 views
Bethany Link delivers parts for several local auto parts stores. She charges clients $0.75 per mile driven. She has determined
1. 0 answers
2. asked by Vanessa
3. 1,080 views
Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a
1. 5 answers
2. asked by Wes
3. 1,031 views
in HNO3 titration, you add few drops of phenolphthalein indicator to 50.0 mL of acid in a flask. you quickly add 20.00 mL of
1. 1 answer
2. asked by shane
3. 1,001 views
what is the order of these decimals from least to greatest?-1.4 -1.45 -1.45... -1.455
1. 5 answers
2. asked by help please
3. 996 views
The vendor of a coffee cart mixes coffee beans that cost $8 per pound with coffee beans that cost $4 per pound. How many pounds
1. 1 answer
2. asked by Barbara
3. 977 views
A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north.
1. 2 answers
2. asked by Peanutbutter7
3. 961 views
Suppose 1.2x10^3 kg of C is mixed with 2.4x10^5g oxygen gas and carbon dioxide forms.1. write the reaction and balance 2.which
1. 1 answer
2. asked by frank
3. 957 views
A basketball is thrown at 45° to the horizontal. The hoop is located 4.4 m away horizontally at a height of 1.1 m above the
1. 1 answer
2. asked by anna
3. 906 views
A hockey puck slides with an initial speed of 52.3 m/s on a large frozen lake. If the coefficient of kinetic friction between
1. 1 answer
2. asked by Confused
3. 895 views
Hello, my question is the following:The derivative of f(x) = ln(x) is given by f'(x) = 1/x. Find an equation of the tangent line
1. 5 answers
2. asked by Joshua
3. 895 views
Write a sentence for the given topic, using a form of one of the following linking verbs in each sentence: smell, sound, feel,
1. 5 answers
2. asked by Steven
3. 877 views
According to U.S. News & World Report data, in 1995 tuition costs at Indiana University, a public university, were $2,984 per
1. 1 answer
2. asked by mike
3. 865 views
A block of mass m = 3.60 kg is pushed a distance d = 2.60 m along a frictionless, horizontal table by a constant applied force
1. 1 answer
2. asked by Anonymous
3. 848 views
. A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the centre of gravity,
1. 2 answers
2. asked by uchenna
3. 820 views
In a TV set, an electron beam moves with horizontal velocity of 2.5 × 107 m/s across the cathode ray tube and strikes the
1. 1 answer
2. asked by sara
3. 815 views
A stone is thrown at 15 m/s an angle \theta below the horizontal from a cliff of height H. It lands 78 m from the base 6 s
1. 1 answer
2. asked by karine
3. 813 views
a student mixes 4 reagents together thinking that the solution will neutralize each other . The solution is mixed together are
1. 2 answers
2. asked by mathew
3. 805 views
A 8.80-g sample of solid SnCl2·2H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior,
1. 2 answers
2. asked by himesh
3. 779 views
Solve each system of equation by grpahing?3. y=-3x+6 2y=10x-36 4. y=-x-9 3y=5x+5
1. 1 answer
2. asked by anonymous
3. 778 views
What is the preferred method of sterilization for heat-sensitive solution? In addition, note a heat-sensitive solution that can
1. 1 answer
2. asked by Rose
3. 738 views
Using the following cash flows for projects A and B, use payback period, discounted payback period, NPV, IRR, and MIRR to see if
1. 0 answers
2. asked by James
3. 738 views
Experiment: Redox titration;determination of ascorbic acid by an iodometric back-titrationWhy is sodium carbonate added to the
1. 1 answer
2. asked by Jennifer
3. 731 views
Name a pathogenic endospore-forming bacterium (provide genus and species names) which can be associated with improperly canned
1. 0 answers
2. asked by Rose
3. 719 views
4. What is the value of the expression below?|-4 -3| - |6 -2| -11 -3 3 11 *** 5. Which word phrase could represent the variable
1. 4 answers
2. asked by Princess Anna
3. 718 views
A state trooper chases a speeder along a straight road; both vehicles move at 160 km/h. The siren on the trooper's vehicle
1. 1 answer
2. asked by onon
3. 709 views
ProximaCentauriisapproximatelythesamedistancefromEarth(slightly less than 4.3 light years) as Alpha Centauri A, but it has an
1. 2 answers
2. asked by kennisha
3. 694 views
An acoustic burglar alarm consists of a source emitting waves of frequency 28.0 kHz. What is the beat frequency between the
1. 0 answers
2. asked by onon
3. 690 views
an empty truck with a mass of 3000 kg has a maximum acceleration of 1m/s2 .what will its acceleration be when it carries a load
1. 1 answer
2. asked by maziya
3. 689 views
An ambulance with a siren emitting a whine at 1600 Hz overtaken and passes a cyclist pedaling a bike at 2.44 m/s. After being
1. 1 answer
2. asked by onon
3. 688 views
H2C=C-C-C-CH3THERE IS AN H ATTACHED TO THE CARBON AFTER THE FIRST BONG THEN A H2 ON THE 2ND AND 3RD CARBON
1. 5 answers
2. asked by M
3. 684 views
Tom wants to build a pen in his yard for his dog. He buys 800 ft of fencing. He concludes that he can only build a rectangle
1. 2 answers
2. asked by Anonymous
3. 683 views
what does this question mean :Sketch a graph to show four graphs in each family. a) y=(x-3)(x+6) b) y= (x+1)(x+1)
1. 2 answers
2. asked by sunny
3. 683 views
In the preparation of a rock salt solution, 1.522 grams of impure rock salt was dissolved in 50.0 ml of distilled water. The
1. 1 answer
2. asked by julia
3. 678 views
what is the prime factorization of 140
1. 1 answer
2. asked by anonymous
3. 665 views
7. Find the sum.–14 + 7 + (–3) –24 –18 –10 *** –4 8. A scuba diver descends 350 feet and then another 120 feet.
1. 6 answers
2. asked by Sally
3. 665 views
A ball is thrown at 15.5 m/s at 42° above the horizontal. Someone located 30 m away along the line3 of the path starts to run
1. 1 answer
2. asked by Sophie
3. 664 views
Why does biomass decrease as we move up the biomass pyramid?
1. 0 answers
2. asked by A
3. 659 views
A spacecraft is in orbit close to the moon's surface. The centripetal acceleration is 1.6 m/s^2. If the radius of the moon is
1. 1 answer
2. asked by Claire
3. 653 views
I'm working on a school math project, and i need to make my own 2 plans, i know that you can split all 17.5 ct diamonds so that
1. 2 answers
2. asked by Penguin.anna
3. 652 views
Name a pathogenic bacterium (provide genus and species names) and the disease caused in humans that is typically spread by
1. 0 answers
2. asked by Rose
3. 636 views
1. How did racism impact African American lives during the Great Depression and their access to New Deal programs?2. How were
1. 1 answer
2. asked by Lavanessa Young
3. 632 views
A car travelling at 60 km/h hits a bridge abutment. A passenger in the car moves forward adistance of 67 cm (with respect to the
1. 1 answer
2. asked by gregory
3. 627 views
500 g of Fe reacted with water to yield 4.2 g of H2. Fe3O4 was also produced in the reaction. What is the %yield of H2?
1. 3 answers
2. asked by Monika
3. 623 views
Please help me! I don't know how to do this at all.Calculate the enthalpy for the reaction: NO (g) + O (g) → NO2 Given the
1. 1 answer
2. asked by Luca
3. 620 views
In order to identify a compound using TLC it is necessary to spot a sample of the pure compound. Why is this necessary?
1. 1 answer
2. asked by Mor
3. 619 views
To estimate the size of a bear population on the Keweenaw Peninsula, conervationist captured, tagged, and released 50 bears. One
1. 1 answer
2. asked by LadyG
3. 609 views
Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the
1. 0 answers
2. asked by Whitney
3. 605 views
Which word phrase could represent the variable expression 3d + 5? Let d = Beth's age.five more than Beth’s age times three
1. 1 answer
2. asked by Anonymous
3. 598 views
A recent research study found that surfing the internet and accessing non-academic grades resulted in lowering students GPA.Dr.
1. 0 answers
2. asked by John Doe
3. 586 views
a car is moving at 80km/hr and slows down to 13km/hr in 9.75 seconds. Calculate the car's accelerationFormula for acceleration=
1. 1 answer
2. asked by Coleson
3. 584 views
how does the speakers mother fell about herself as a young girl
1. 2 answers
2. asked by clra
3. 578 views
1. What happens to companies with high operating leverage when the market declines? What happens when the market expands?
1. 0 answers
2. asked by Chloe
3. 569 views
There were many examples that inspired the reform-minded spirit after 1900. Which was not an example?Muckrakers Plessy v.
1. 5 answers
2. asked by Bob
3. 568 views
A patient with an active case of Mycobacterium tuberculosis (TB) was treated and released from the hospital. You are responsible
1. 0 answers
2. asked by Rose
3. 567 views
If 70.0 mL of water is added to 30.0 mL of 0.400 M solution of NaOH, what is the new concentration of NaOH?
1. 1 answer
2. asked by h
3. 565 views
I am creating my own company (clothing store) and have to create a circle graph and frequency table, and explain how they can
1. 0 answers
2. asked by Meghan
3. 560 views
Women made many contributions during World War I. Which area did they make the least impact?Nurses in the war Heavy industry
1. 4 answers
2. asked by Randy
3. 554 views
Why is the term, "evolution" applied to Charles Darwin even today? and Why and how does it apply to a cultural anthropology?-Tha
1. 1 answer
2. asked by Anonymous
3. 553 views
What are some similarities and differences between the poems "i sing of Olaf glad and big" and "Night, Death, Mississippi"?
1. 1 answer
2. asked by Aly
3. 552 views

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