Archives
2013
April

Questions Asked on April 2, 2013

Write a chemical equation representing the second ionization energy for lithium.use e- as the symbol for an electron.
1. 3 answers
2. asked by anonymous
3. 18,699 views
Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum
1. 2 answers
2. asked by Anonymous
3. 17,701 views
Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 1.1 times the
1. 1 answer
2. asked by sam
3. 10,736 views
Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks!Why do you think the Inuit have
1. 28 answers
2. asked by anon
3. 8,249 views
Simplifying RadicalsA gardener is mowing a 20-yd-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner
1. 13 answers
2. asked by Jane
3. 7,163 views
Abiotic means non livingBiotic means living The following list is to enter into a Venn Diagram where the circles are labeled
1. 35 answers
2. asked by Jerald
3. 6,110 views
For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for
1. 5 answers
2. asked by Connor
3. 5,786 views
If 3.21 mol of a gas occupies 56.2 L at 44*C and 793 torr, 5.29 mol of this gas occupies __________ L under these conditions..
1. 5 answers
2. asked by Shadow
3. 5,241 views
The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = -15.9 µC.
1. 1 answer
2. asked by Zack
3. 4,973 views
H2C2O4.2H2O(s) is primary standard substance. 2.3688g of oxalic acid hydrate were completely neutralized by 42.56ml of NaOH
1. 2 answers
2. asked by Sean
3. 4,361 views
Can anyone help explain how to work this problem out?One factor in flood safety along a levee is the area that will absorb water
1. 10 answers
2. asked by lee
3. 4,130 views
The altitude (in feet) attained by a model rocket t seconds into flight isgiven by the function h(t) = -1/3t^3 + 4t^2 + 20t +
1. 1 answer
2. asked by Deeno
3. 4,085 views
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object.
1. 2 answers
2. asked by Anonymous
3. 4,025 views
Use Coulomb's Law to calculate the energy of a copper ion and an oxide ion at their equilibrium ion-pair separation distance.Cu^
1. 1 answer
2. asked by anonymous
3. 3,993 views
Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?
1. 8 answers
2. asked by Rihanna
3. 3,920 views
Here are the effective nuclear charges, Zeff, for the valence electrons of four different atoms. 1.30, 1.95, 2.60, 3.25 In
1. 5 answers
2. asked by marie darling
3. 3,769 views
At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate
1. 1 answer
2. asked by Dee
3. 3,746 views
n the xy -plane, the graph of y = x^2and the circle with center (0,1) and radius 3 have how many points of intersection?
1. 2 answers
2. asked by naomie
3. 3,663 views
The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the
1. 1 answer
2. asked by Viv
3. 3,639 views
Pythagorean TheoremA rectanglar box is 9 in. wide, 11 in. tall, and 20 in. long. What is the diameter of the smallest circular
1. 6 answers
2. asked by Jane
3. 3,636 views
1.Which of the following are accomplishments of the Incas? (1 point) pyramids floating gardens hieroglyphics roads and aqueducts
1. 65 answers
2. asked by Anonymous
3. 3,359 views
Rank these elements according to electron affinity.Br, S, Ne most energy released by gaining an electron: most energy absorbed
1. 1 answer
2. asked by anonymous
3. 3,356 views
A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is
1. 7 answers
2. asked by L0velyLayna
3. 3,271 views
Which of the following could NOT represent the intersection of a plane and a triangular prism?A. a triangular prism B.a triangle
1. 3 answers
2. asked by B6
3. 2,972 views
Fe2O3 + 3C = 2Fe + 3COHow many grams of C are required to react with 2.50 moles of Fe2O3 ?
1. 2 answers
2. asked by Marcie
3. 2,871 views
If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2.Therefore, to find y = sin−1(−3/22, we must find an angle y whose
1. 1 answer
2. asked by HELP!!!!
3. 2,871 views
Lou eats 6/8 of a pizza. What fraction of pizza is left over?
1. 14 answers
2. asked by Anonymous
3. 2,774 views
Find the range of the function rule y = 5x - 2 for the domain D = {-5, -1, 0 2, 10}
1. 3 answers
2. asked by Anonymous
3. 2,606 views
A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and
1. 1 answer
2. asked by dallas
3. 2,598 views
A carpenter is building rectangular walls for a room addition. The width of a section of wall is two times the height h. Each
1. 1 answer
2. asked by Jane
3. 2,503 views
The pH of a .10M HOBr solution is 4.81. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and
1. 1 answer
2. asked by Ray
3. 2,477 views
The student council is buying school T-shirts to sell during a fundraiser. The cost (y) of school T-shirts is a linear function
1. 4 answers
2. asked by Amy
3. 2,364 views
write an equation for a rational function whose graph has all of the indicated features:-vertical asymptote with equation x=3
1. 1 answer
2. asked by sam
3. 2,295 views
An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is
1. 1 answer
2. asked by Caroline
3. 2,202 views
For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius
1. 2 answers
2. asked by Jacob
3. 2,006 views
Consider the pair of linear equations below.4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B:
1. 1 answer
2. asked by Jayson Angole
3. 1,985 views
Two lenses are in contact. One of the lenses has a focal length of +10.0cm when used alone. When the two are in combination, an
1. 3 answers
2. asked by Jul
3. 1,973 views
A box contains 4 red pencils, 3 blue pencils, and 3 yellow pencils. What isthe probability that a student randomly selects a
1. 2 answers
2. asked by andrea
3. 1,962 views
The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable
1. 1 answer
2. asked by Anonymous
3. 1,916 views
A uniform, 264-N rod that is 2.05 m long carries a 225-N weight at its right end and an unknown weight W toward the left end.
1. 1 answer
2. asked by Matt
3. 1,795 views
A walking path is shaped like a rectangle with a width 7 times its length "l". What is a simplified expression for the distance
1. 1 answer
2. asked by Jane
3. 1,764 views
The sizes and shapes of the hydrogen atom orbitals was revealed through graphical analysis of the corresponding wave functions.
1. 1 answer
2. asked by anonymous
3. 1,728 views
Between which two consecutive integers is the value of this irrational number?square root of 117? A. 8 and 9 B. 10 and 11 C. 14
1. 2 answers
2. asked by andrea
3. 1,617 views
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How far did
1. 3 answers
2. asked by Anonymous
3. 1,600 views
Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m.Is the formula F=1/T?
1. 1 answer
2. asked by Denise
3. 1,597 views
The coil in the figure below contains 425 turns and has an area per turn of 3.00 10-3 m2. The magnetic field is 0.21 T, and the
1. 1 answer
2. asked by Anonymous
3. 1,490 views
An isotope has a 12.4 hour half life. If it has an activity of 30mCi at noon today, what was its activity at 3 p.m. yesterday?
1. 1 answer
2. asked by Gajender Goswami
3. 1,434 views
The following table gives the velocity v(t) (in feet per sec) at different instances of time t (in sec) of a particle moving
1. 4 answers
2. asked by Marto
3. 1,397 views
How many electrons in an atom could have these sets of quantum numbers?n=3 n=5, l=2 n=6, l=1 ml=-1
1. 2 answers
2. asked by anonymous
3. 1,394 views
An area rug is shaped like a golden rectangle. Its length is 8 ft. What is the rug's width? Write your answer in simplified
1. 118 answers
2. asked by Jane
3. 1,386 views
How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cmlong?
1. 2 answers
2. asked by tom
3. 1,385 views
what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)
1. 1 answer
2. asked by josh
3. 1,314 views
If Jo is supposed to read one-half of a 100-page book for an English assignment and she has finished 38 pages, what percent of
1. 2 answers
2. asked by Anonymous
3. 1,311 views
a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the
1. 1 answer
2. asked by yonela
3. 1,247 views
A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average
1. 1 answer
2. asked by Marty
3. 1,241 views
Emily,Zeke,Harry,& Brook each conducted surveys on the number of books people havein their homes. Then they answered the
1. 0 answers
2. asked by andrea
3. 1,229 views
Students submitted pictures for the schoolyearbook. Only 4/5 of the submitted pictures fit in the yearbook. There were 105
1. 3 answers
2. asked by andrea
3. 1,216 views
Does Pb(NO3)2 + Cu has a reaction? if so, what will it be?
1. 2 answers
2. asked by LG
3. 1,211 views
What are 4 examples of physical systems designed by people?
1. 3 answers
2. asked by kole
3. 1,204 views
Which statement is true?A. All vertical lines have a slope of zero. B. All vertical lines have a slope positive slope. C. All
1. 1 answer
2. asked by andrea
3. 1,181 views
Suppose that there is a rectengular box with a length of 8 centimeters a width of 6 centimeters and a height of 4
1. 1 answer
2. asked by Firdous
3. 1,173 views
Tonya took out a loan to help pay for her house. She borrowed $50,000 for 15 years at a yearly simple interest rate of 5%. How
1. 2 answers
2. asked by Sanya
3. 1,163 views
If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified?I am pretty sure I
1. 0 answers
2. asked by Lara
3. 1,162 views
What would be the speed of the following particles if they had the same wavelength as a photon of green light (λ = 500.0 nm)?Pr
1. 0 answers
2. asked by Anonymous
3. 1,154 views
Calculate the standard enthalpy change for the following reaction at 25 °C.MgCl2(s)+H2O(l)-->MgO(s)+2HCl
1. 1 answer
2. asked by Orton
3. 1,147 views
use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its
1. 2 answers
2. asked by james
3. 1,127 views
if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left
1. 4 answers
2. asked by Kelly
3. 1,116 views
What was the first South American nation to receive independence? (1 point)Chile Argentina Paraguay Brazil My Answer: 1)
1. 10 answers
2. asked by Gabby
3. 1,100 views
A rectangular plot measures 16 meters by 34 meters ,find the distance from one corner of plot to the corner diagnolly oppositeAn
1. 1 answer
2. asked by Firdous
3. 1,097 views
Find the domain, range and horizontal asymptotef(x)=2^-x-2
1. 1 answer
2. asked by Alley
3. 1,093 views
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach
1. 0 answers
2. asked by Brooke
3. 1,083 views
Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.
1. 1 answer
2. asked by Samson
3. 1,075 views
I am so overwhelmed. can somebody please help me?Consider a solution that is 0.022 M in Fe^2+ and 0.014 in Mg^2+ A) if K2CO3 is
1. 2 answers
2. asked by Jennifer
3. 1,068 views
2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and
1. 3 answers
2. asked by michelle
3. 1,056 views
A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak.
1. 0 answers
2. asked by stranger
3. 1,052 views
use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its
1. 1 answer
2. asked by james
3. 1,037 views
A rectangular room has an area of 120ft squared. Marge drew a scale drawing of the pool using the scale 1.5cm=2ft. What was the
1. 1 answer
2. asked by pitigoiu
3. 1,028 views
For a Chinese New Year celebration, James and Zhou are making a dragon costume similar to the one shown above.In total, the
1. 1 answer
2. asked by Sanya
3. 1,019 views
block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R =
1. 1 answer
2. asked by Ashley
3. 1,019 views
For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for
1. 0 answers
2. asked by Connor
3. 1,002 views
Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?
1. 2 answers
2. asked by Stephanie
3. 1,001 views
A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in
1. 2 answers
2. asked by please help me out!!
3. 996 views
A 182 cm tall man is digging a hole in the ground. He stops for a moment and says: "I am done with one quarter of the hole. When
1. 2 answers
2. asked by Nikee
3. 977 views
A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface
1. 0 answers
2. asked by Emily
3. 966 views
1.Angiosperms have organs such as ______________ and produce seeds. The are described as _________________plants. (1 point)
1. 6 answers
2. asked by Delilah
3. 954 views
A 23.4 mL sample of 0.300 M trimethylamine, (CH3)3N, is titrated with 0.399 M perchloric acid.After adding 6.67 mL of perchloric
1. 1 answer
2. asked by Sean
3. 953 views
Can someone check these sentences I need to prepare for tomorrow?Thank you. 1) Troy has been at the BRIT School since he was 14.
1. 0 answers
2. asked by John
3. 950 views
Show proof of deriving the Quadratic Formula from the Quadratic Equation ax^2 + bx + c = O
1. 1 answer
2. asked by Jeconiah
3. 947 views
A plane flies horizontally at constant ground speed v=720km/h. The pilot is informed by an air traffic controller that he must
1. 9 answers
2. asked by Crow
3. 945 views
The population in a town called Atown in December 1900 is a perfect square. In January 1901, 48 people moved in, and the
1. 2 answers
2. asked by please help me out!!
3. 942 views
Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?
1. 1 answer
2. asked by Cindy
3. 933 views
A jogger starting morning run accelerates from a stand still to their jogging pace of 8km/hr. They reach a speed of 8km/hr 5
1. 1 answer
2. asked by Parshu Ram
3. 931 views
The quantity demanded each month of Russo Espresso Makers is 250 when the unit price is $136. The quantity demanded each month
1. 1 answer
2. asked by rich
3. 931 views
Explain clearly which out of the following combinations of solutes would result in the formation of a buffer solution?A) NH3 and
1. 3 answers
2. asked by Jill
3. 919 views
Paula invested into two accounts; one pays 5% simple interest and the other 6% simple interest. She invested $3000 more in the
1. 1 answer
2. asked by Sandra
3. 918 views
What will be the temperature of a 3.5 gram sample of carbon dioxide gas in a 2.5 liter container at .955 atm
1. 1 answer
2. asked by Ben
3. 911 views
Please help1. 3 x (8 + 5) + 2 2. 9 x (8 / 4 x 5) By the way / means dividing
1. 3 answers
2. asked by Anonymous
3. 890 views
The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable
1. 1 answer
2. asked by Anonymous
3. 886 views
Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.
1. 0 answers
2. asked by Samson
3. 885 views
At the normal boiling point of toluene,Δ Hvap=33.2 kJ/mol and ΔSvap= 86.5J/mol•K. What is the normal boiling point of
1. 2 answers
2. asked by Viv
3. 880 views

Back to April 2013

Ask a New Question

Archives
Contact Us
Newest
Privacy Policy
Terms of Use
© 2025