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Excited lithium atoms emit radiation at 670.8nm.a. calculate the frequency of this radiation. b. calculate the energy (in eV) of
1. 1 answer
2. 696 views
simplify by removing factors of 1n^2-9/(n+3)^2
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2. 399 views
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur
1. 1 answer
2. 651 views
Ammonia gas can be prepared by the reaction CaO(s) + 2NH4Cl(s) -> 2NH3(g) + H2O(g) + CaCl2(s)If 112 g CaO reacts with 224 g
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2. 1,061 views
Copper reacts with sulfuric acid according to the following equation:2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur
1. 0 answers
2. 718 views
Ammonia gas can be prepared by the reaction CaO(s) + 2NH4Cl(s) -> 2NH3(g) + H2O(g) + CaCl2(s)If 112 g CaO reacts with 224 g
1. 2 answers
2. 1,244 views
determine the value of x for the following reaction: 4C + S8-> 4CS23.2 mol S8 yield x mol CS2
1. 1 answer
2. 2,201 views
How many moles of oxygen can be obtained by the decomposition of 7.5 mol of reactant in the following reaction?2KClO3 -> 2KCl +
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2. 3,241 views
The solubility of NaCl in water is 35.7 g NaCl/100 g H2O. Suppose that you have 500.0 g of NaCl. What is the minimum volume of
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2. 3,181 views
An explosive whose chemical formula is C3H6N6O6 produces water, carbon dioxide, and nitrogen gas when detonated in oxygen. write
1. 2 answers
2. 2,977 views
which is the symbol for the following monatomic ion?8 protons and 10 electrons
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2. 1,069 views
On average, earth's crust contains about 8.1% aluminum by mass. If a standard 12-ounce soft drink can contains approximately
1. 7 answers
2. 6,852 views
Titanium is used in airplane bodies because it is strong and light. It has a density of 4.55 g/cm^3. If a cylinder of titanium
1. 2 answers
2. 2,507 views
Mercury has a density of 13.6 g/mL. What is the mass of 4.72 L of mercury?
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2. 778 views
Mercury has a density of 13.6 g/mL. What is the mas of 4.72 L of mercury?
1. 4 answers
2. 836 views
A sample of crude oil has a density of 0.87g/mL. What volume in liters does a 3.6-kg sample of this oil occupy?
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2. 1,200 views
balance the chemical equation:Al(OH)2-- Al^2+ +OH^-
1. 3 answers
2. 460 views
show that 1mg/L = 1g/m3
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2. 710 views
you made up a standard solution of calcium sulfate (CaSO4). the temperature is 25C. you then add 5.00*10^-3 odium sulfate
1. 2 answers
2. 964 views
the concentration of a chemical degrades in water according to order kinetics. the degradation constant is 0.2 day^-1. if the
1. 7 answers
2. 1,476 views
if 200mg of HCl is added to water to achieve a final volume of 1.00 L, what is the final pH?
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2. 1,310 views
A solution of sodium bicarbonate is prepared by adding 45.00g of sodium bicarbonate to a 1.00-L volumetric flask and adding
1. 5 answers
2. 2,741 views
A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression
1. 1 answer
2. 830 views
If faucet is dripping at a rate of one drop per second and each drop contains 0.150 milliliters. Calculate how much water will
1. 3 answers
2. 2,290 views
How was the grenade developed to help the war effort?
1. 1 answer
2. 381 views
what fallacy is this? I don't know what colleges are teaching these days! I have just received a letter of application from a
1. 2 answers
2. 649 views
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for
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2. 564 views
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for
1. 0 answers
2. 447 views
if a triangle has a perimeter of 50cm one side is double the length of the base and the second side is four less than three
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2. 402 views
3u-ux/x=6y/x
1. 1 answer
2. 283 views
(y-1)/2u+x=m what does "u" equal?
1. 2 answers
2. 307 views
(x-u)/3=5-ywhat does "u" equal?
1. 1 answer
2. 316 views
I don't get page 50 of algebra with pizzazz!Please help? 7) Kathy is 6 years younger than bill. 12 years ago bill was twice as
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2. 1,150 views
Suppose you must maintain a balance of least $500 in your checking account in order to have free checking. The current balance
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2. 676 views
How do I find the value of x such that the data set has the given mean.Example: 11,12,5,3,x; Mean=7.4
1. 2 answers
2. 744 views
Personal finance classes can help you if you have difficulties making budgets.Looking for verb and verb tense
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2. 400 views
why do isomers have different properties? please give examples.
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2. 374 views
I have to write a paragraph which sustains an ironic tone. I have two thesis that I want to write about.(1)Being organized shows
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2. 629 views
what is the process of ice fishing in the colonial times
1. 0 answers
2. 309 views
Define Socialism. George Orwell doesnt think Socialism can work. WHY? How does he prove that it doesnt work by the way Animal
1. 1 answer
2. 486 views
We just got done reading Animal Farm, by George Orwell. I cant come up with enough facts for the following questions.How does
1. 2 answers
2. 699 views
A bakery is making whole-wheat bread and apple bran muffins. For each batch of bread they make $35 profit. For each batch of
1. 5 answers
2. 2,716 views
An appliance store manager is ordering chest and upright freezers. One chest freezer costs $250 and delivers a $40 profit. One
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2. 698 views
James has an assigned seat for his flight to Denver.The seats on the plane are numbered 1-49.James's seat number is an odd
1. 1 answer
2. 541 views
can you help me through this?A boat moves through a river at 7.0 m/s relative to the water, regardless of the boat's direction.
1. 1 answer
2. 1,666 views
Can someone help me please. I am having a hard time answering this question.Do you think Great Britain was justified in imposing
1. 6 answers
2. 774 views
A 23.0 kg block is initially at rest on a horizontal surface. A horizontal force of 80.0 N is required to set the block in
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2. 595 views
One can think of "a out of b" without actually removing the pieces. For example, one might think of the fraction of Xs in the
1. 0 answers
2. 800 views
A runner’s velocity along a straight track is 3.2 m/s at time 5.0 s and 2.2 m/s at time 13 s. Find the runner’s average
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2. 420 views
A car accelerates from rest at 1.70 m/s2 along a 220-m stretch of road. Find the car’s velocity at the end of the stretch.
1. 2 answers
2. 473 views
On a planet that has no atmosphere, a rocket 14.2 m tall is resting on its launch pad. Freefall acceleration on the planet is
1. 2 answers
2. 2,896 views
The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball,
1. 0 answers
2. 747 views
A particle's initial velocity is −24.0 m/s. Its final velocity, 3.00 seconds later, is −14.0 m/s. What was its average
1. 1 answer
2. 444 views
A student needed to standardize a solution of NaOH which was approximately 0.125 M. The student carefully prepared the titration
1. 3 answers
2. 1,055 views
In the triangle ABC, angle a=46 degrees and angle B=83 degrees. How large is the exterior angle at C?
1. 1 answer
2. 962 views
A water balloon is dropped from the top of a building. Assume the balloon does not break when it strikes the ground. If the
1. 0 answers
2. 993 views
A 26 foot step ladder is leaned up against a 30 foot building to reach a window near the top. The ladder is being pushed toward
1. 0 answers
2. 729 views
Predict how many electrons will most likely be gained or lost by each of the following elements.how do i know if they will lose
1. 1 answer
2. 799 views
d is the midpoint of line CE, AE=49, AC=3x-46, BC=5, and BD=x. Find AD
1. 1 answer
2. 476 views
If the wind is blowing from the west at 17 knots, what is its speed in miles per hour? In kilometers per hour?
1. 1 answer
2. 523 views
How do I simplify this: 16c-10d+3d-5c?
1. 4 answers
2. 718 views
28.66ml(.7857 g/cm cubed)= meters
1. 0 answers
2. 327 views
A new penny has a mass of 2.54 g and a volume of 0.354 cm3. Is the penny made of pure copper? what is its density?thanks:)
1. 4 answers
2. 816 views
Find the designated term of the binomial expansion.5th term of (4a+2b)^3 This is done without using Pascal's Triangle.
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2. 1,434 views
4.00 grams of NaOH have been added to 2.0 liters of water. The molarity of this solution is ____M. the concentration of this
1. 1 answer
2. 535 views
Please check the questions about the tragedy Romeo and Juliet below.1.Friar Laurence could best be described as: A. a very mean
1. 2 answers
2. 597 views
In Romeo and Juliet, who was the alst person to see Juliet alive?A. Romeo B. Friar Laurence C. the Nurse D. Lord Montague E.
1. 2 answers
2. 881 views
In Romeo and Juliet, what is the relationship between Juliet and the Nurse best described asA. like mother and daughter B. like
1. 1 answer
2. 527 views
"...for every piece of candy American children eat, their British cohorts eat two.."Where could I get a copy of the above
1. 3 answers
2. 383 views
I am trying to find a research article that examines the prevalence of obesity amoungst elementary school children. However, I
1. 2 answers
2. 673 views
Carlos Martin received a statement from his bank showinga balance of $56.75 as of March 15. His checkbook shows a balance of
1. 1 answer
2. 688 views
The deltaS for a reaction is 3.0 J/(mol*K) at 25 degrees C. Caluculate the deltaG for the reaction when DeltaH = -394 kL and
1. 3 answers
2. 922 views
Hi I need help with Geography of World Commerce. Is there anyone who can help me?also do you assist with essays?
1. 1 answer
2. 394 views
Which cities are the major trading centers for each of the major continents, and what led to their development?
1. 2 answers
2. 514 views
solve one ninth = 27^3x-5.
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2. 348 views
what are the disavantages of job analysis?
1. 0 answers
2. 357 views
What lyrics would you reference to indicate author Simon & Garfinkel's bias in the song the sounds of silence
1. 2 answers
2. 499 views
How are health care administrators involved in determining the quality of care provided to patients?
1. 0 answers
2. 419 views
Which statements are FALSE about selecting a solvent for recrystallization?(Select all correct answers.) Any solvent can be used
1. 1 answer
2. 750 views
Assuming you have a mixture of 2-nitrophenol and 4-nitrophenol, which solvent would be most suitable for recrystallization if
1. 0 answers
2. 1,098 views
Which purpose does recrystallization serve?(Select all correct answers.) It is used to purify liquids. To separate unreacted
1. 0 answers
2. 564 views
Compound A is recrystallized from n-propanol. Given are the following solubilities (in 100 mL of solvent): 160 g/100 °C, 100
1. 1 answer
2. 509 views
(p-7)(p+8)
1. 1 answer
2. 369 views
Origen was the first Bishop of ______in what year. Studying for midterm and this is one of the questions I can't find an answer
1. 3 answers
2. 530 views
In Customer Relationship Management (CRM)what is lifetime value of customer? The definition states...The potential profit
1. 1 answer
2. 594 views
What was Eusebius branded as for his unorthodox beliefs prior to the council of Nicea?
1. 1 answer
2. 398 views
how can you fill a flask with pure oxygen without mixing it with air
1. 1 answer
2. 1,434 views
1. Write the balanced chemical equation for the reactionNaOH + HCI --> NaCI + H20 2. Extract the relevant information from the
1. 5 answers
2. 2,068 views
On january 1st, NetSolutions had a debit balance of $1,250.00 in the Office Supplies account. During the month, Netsolutions
1. 0 answers
2. 668 views
I need help with propose new hiring practices for the company to follow. In your proposal address the legal and ethical issues
1. 4 answers
2. 510 views
How do you journalize on Feb 10: Paid for goods purchased on Feb 3?for feb 3 I put down Inventory and Accounts payable for
1. 1 answer
2. 492 views
A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. What is the volume of the gas at STP? Please show the work.
1. 1 answer
2. 871 views
Does anyone know how to say immiscible in spanish?
1. 1 answer
2. 354 views
Why does the inequality sign change when both sides aremultiplied or divided by a negative number? Does this happen with
1. 1 answer
2. 447 views
If 3 people are asked what day of the week they were born, find the probability thati) 2 or 3 are the same. ii) only 2 people
1. 2 answers
2. 945 views
There is exactly the same number of lollies in 10 different colours in a jar. (There are thousands of each lolly)If one lolly is
1. 1 answer
2. 491 views
There is exactly the same number of lollies in 10 different colours in a jar. (If one lolly is picked out , the probability of
1. 1 answer
2. 364 views
A 0.972g sample of a CaCl2*2H2O/K2C2O4*H2O solid salt mixture is dissolved in ~ 150ml of deionized water, previously adjusted to
1. 1 answer
2. 1,732 views
A line parallel to 4x=3y-13?I came up with m=4/3 y-3=4/3 + 16/3 after working problem got ans y= 4/3x+25/3 confused???
1. 0 answers
2. 354 views
finding a equation in slope-intercept form. Through (-9, 2.5) and (-5, 4.5)
1. 3 answers
2. 379 views

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