Davis
Popular questions and responses by Davis
Chem
Bromine has two natural occurring isotopes (Br79 and Br81) and has an atomic mass of 79.904 amu. The mass of Br81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br79.
asked on August 28, 2011 
Chemistry
Samples of three different compounds were analyzed and the masses of each element were determined. Compound Mass Mass N(g) O(g) A 5.6 3.2 B 3.5 8.0 C 1.4 4.0 If you were John Dalton and had never heard of a mole, which of the following would you think were
asked on August 29, 2011 
Physics
A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him
asked on October 30, 2014 
math
A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?
asked on June 25, 2013 
Chem!!!:/
Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.
asked on March 12, 2012 
basic chem
1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?
asked on August 28, 2011 
Chemistry II
How long would it take for 1.50mols of water at 100.0deg C to be converted completely into steam if heat were added at a constant rate of 16.0j/s
asked on February 4, 2010 
math
The ã61 (square root of 61) is between what two whole numbers?I am a little bit losed when coming up with the answer can I trouble you for some help.
asked on September 27, 2010 
maths
two angles of a triangle are m° and (m+20)°.their sum is greater than the third angle.find the range value of m
asked on August 30, 2019 
math
a movng company wants to buy a new type of truck and needs to know the volume of the storage compartent before they can decide if they should purchase the truck. What is the volume of the storage compartment? 10ft, 18ft, 8ft, 2ft, 15ft.
asked on December 27, 2012 
Math algebr
Desire which property is illustrated by the given statement Which property is illustrated by the equation 3/7 (17) =  17 ( 3/7) A. Commutative property of multiplication B. Associative property of addition C. Distributive property D. Associative property
asked on August 18, 2015 
math
Simplify 4 to the 7th over 5 squared all raised to the 3rd power. 4 to the 10th over 5 to the 5th 4 to the 4th over 5 4 to the 21st over 5 to the 6th 12 to the 7th over 15 squared
asked on August 24, 2017 
chemistry
How many grams of NaCl should be added to 250 grams of water to make a 0.40 m solution? I got 19 grams. this is how I got it. first I found the mass of water = 18g then I converted that to mols 18/250 = .0072. I subtracted 0.072  0.40 = 0.328 I found the
asked on March 24, 2007 
IT/Proj Mgmt
Innovative Systems is ready to get started using the PMI standard. BPP is advising IS on a new project bid. The project involves setting up an automated tracking system for a library. Radio frequency (RF) tags would be attached to each book, and a
asked on June 21, 2009 
trig
Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.
asked on August 26, 2011 
math
I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She then drove to the beach which took her 4 hours and 25 minutes. It only took
asked on September 27, 2010 
math
Sally's $1,800 savings is in two accounts. One account earns 6% annual interest and the other earns 3%. Her total interest for the year is $93. How much does she have in each account?
asked on November 19, 2019 
math
Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61
asked on September 24, 2010 
Trig
Find the angle of the measure formed by the clock. 2:15
asked on August 29, 2011 
trig
Suppose that 0degrees
asked on August 26, 2011 
math
find the median and mean of this numbers 95,75,86,96,70,68,76,81,95,76,69,83,93,88,94 Is the median 83and the mean 83 if i arrange the numbers in ascending order
asked on September 24, 2010 
math
(6)^24^2 How wouLD I WORK THIS PROBLEM OUT
asked on September 22, 2010 
HCA/220
◦Scenario 2: You are an allied health professional working with an orthopedist. You have been working with the patient and need to update the doctor on the reason for the patient’s visit. Begin describing the patient’s concerns. Your classmates may
asked on January 10, 2010 
PSY HELP!!! Please
Match the psychological theories with the appropriate statement(s): Psychodynamic Theory Trait Theory Learning Theory Sociocultural Humanistic Theory Popular theorist Eysenck initiated the fivefactor model. The healthy personality is found in balancing
asked on October 24, 2008 
AP Chemistry
Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)
asked on April 9, 2012 
Math
If you have a line intersecting at (3,6). What equation would represent both lines?
asked on February 8, 2017 
chemistry
calculate the molar concentration of 0.1 " AgNO3
asked on October 2, 2015 
trig
Suppose that 0degrees
asked on August 28, 2011 
trig
Use the appropriate identity to find tan(theta) given that cot theta =0.05.
asked on August 26, 2011 
english
John gave Samuel his hockey stick. In this sentence, Samuel is the ____.
asked on May 19, 2011 
Math 8th grade
How would I set up this problem to solve it: Gene offers 30 mins. and 60 mins. driving lessons. He gave 8 lessons that lasted 7 hours. How many 60 minute lessons did he give?
asked on February 8, 2017 
math
can I trouble any one with this que stion. I got jello brain right now. 7(1)/3(2)9/(3)
asked on September 27, 2010 
math
(8)2 – 8(2 )= I need help with this problem i have wrecked my brain and havnt came up with the answer
asked on September 27, 2010 
math
how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful
asked on September 14, 2010 
Math
you lave a line intersecting at (3,6) what would represent the two lines?
asked on February 8, 2017 
Government
I think it is ( C ) but not sure, can someone verify correct answer Which part of Congress was designed to be more responsive to the citizens? A) Senate B) House C) Both Senate and House D) Neither Senate nor House
asked on November 19, 2015 
PRECALCULUS
solve: tantheta = sintheta
asked on January 23, 2012 
trig
5sin^2 270degrees 3cos180degreestan(180degrees) i got 2 but I'm not sure if i did it right?
asked on August 28, 2011 
english
What is the compound subject of the following? Tamara and Janet served soup and salad at the luncheon.
asked on May 19, 2011 
english
What is the subject of the following sentence? Please help me figure this out! a. Please b. help c. me d. You (implied)
asked on May 18, 2011 
english
Identify the indirect object in the following sentence: Fernando read Miguel a bedtime story.
asked on May 18, 2011 
math
Can any one help me with this problem am having trouble with coming up with the answer. 7(1)/3(2)9/(3)
asked on September 28, 2010 
math
11. Place the following set of numbers in ascending order. 20, –7, 5, –5, 12, 4, 15
asked on September 24, 2010 
math
(9)(5)/3
asked on September 22, 2010 
math
How would you use the concepts from Chapter 8 in a reallife situation?
asked on September 12, 2010 
math
. Which pair of fractions is proportional?0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4 or 0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4
asked on September 11, 2010 
math
Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?
asked on September 11, 2010 
HCA/220
◦Scenario 3: You have just started your career as a physical therapist and have been assigned to a mentor. Begin a discussion with your mentor that mentions specifically how you have helped your patients improve their mobility and aided in their
asked on January 10, 2010 
Gov
Can state elections go into runoff?
asked on October 21, 2015 
english
Research skills are primarily valued for which of the following reasons
asked on February 8, 2015 
english
Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in
asked on May 21, 2011 
math
26
asked on April 2, 2011 
math
Can some one please help me I had developed jello brain today. Can some one explain to me why the line x =  2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = 2 . what would the slope be for y = 2. Please I am
asked on October 25, 2010 
math
4(3)+1/22/(2)
asked on September 22, 2010 
math
16?(2)+(4)/2^3+4 How would i work out this problem to get to the soultion
asked on September 22, 2010 
HCA/220
Scenario 1: You are attending a wellness conference and one of the exhibitors is a chiropractor in your local area. You are unfamiliar with chiropractic care and want to learn more. Since you are at the conference, the doctor assumes that you have
asked on January 10, 2010 
Physics
A spring with a spring constant k=450.0 N/m is attached to a mass of m=8 kg and stretched 0.5 m from its equilibrium position and released. What is the speed of the block when it is at the equilibrium position?
asked on October 24, 2012 
physics
what is nature of a graph of period against angle
asked on November 24, 2011 
english
Which of the following pronouns shows possession? they  them  her  its
asked on May 18, 2011 
math
(4)(5)=
asked on April 2, 2011 
math
I need to see if i worked this problem right. 8  7 =15 8+7=15 do i add this together aredo i subtract and get 1
asked on September 28, 2010 
math
 2.3 – ( 8.9) does it equal 6.6 or x= 2/3=4/6=6/9 x=8/96/9=2/9
asked on September 24, 2010 
math
1/2(5/8)
asked on September 22, 2010 
math
3.4(7.6)
asked on September 22, 2010 
math
94
asked on September 21, 2010 
math
What is the population of Europe in 2000? (b) What is the total area of Europe?
asked on September 16, 2010 
math
Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?
asked on September 12, 2010 
Government
Need help What is the difference between a member of the President’s cabinet and a czar? A)There is no difference. B)Czars are confirmed by the Senate but not cabinet members. C)The President appoints cabinet members but Congress appoints czars. D) Both
asked on November 19, 2015 
math
2+3x+4 input x=3 and output y=6
asked on January 31, 2011 
math
Find the fivenumber summary of the following set of numbers: 349, 243, 119, 363, 246, 505, 263, 221, 324
asked on September 24, 2010 
math
(6)2 (4)2
asked on September 21, 2010 
math
soltion for 3( 6)+(4)(2)
asked on September 21, 2010 
math
1/3+(5/6)+1/2=
asked on September 19, 2010 
math
3/76/7,1/7,1/2,2/7
asked on September 19, 2010 
math
help! what ia 1/4(sin4x)? just to jump start this proof
asked on May 21, 2012

french language
Yes please.
posted on June 7, 2019 
math
I SWEAR THIS TEACHER OR WHOEVER IS SOOOOO COMPLICATED. JUST GIVE HIM THE ANSWER. AINT NOBODY GOT TIME FO THAT.
posted on June 8, 2018 
Math 8th grade
Corrected the question from earlier If you have a line intersecting at (3,6). what equation would represent both lines?
posted on February 8, 2017 
Math 8th grade
What is the equation for this problem
posted on February 8, 2017 
Chemistry
=1/2 [0.2x2x1*2 + 0.2x1x(2)*2] =1/2 [0.4 + 0.8] =1/2 [1.2] = 0.6
posted on August 6, 2016 
Science
Connections here!
posted on April 20, 2016 
Government
so correct answer is house
posted on November 19, 2015 
Government
so is the correct answer ( D )
posted on November 19, 2015 
health
people need to reread the question on the test they have because the answers may not be in the same order
posted on September 24, 2015 
Chemistry
Your answer is correct.
posted on June 30, 2013 
math
there are 4 cows and 8 ducks
posted on March 25, 2013 
AP Chemistry
Thanks Dr. Bob!
posted on April 9, 2012 
AP Chemistry
How do I figure out the Pka value?
posted on April 9, 2012 
AP Chemistry
DrBobHow do I determine the Pka value?
posted on April 9, 2012 
psychology
1.Who came up with the psychosexual stages? *Sigmund Freud Skinner Gardner Lada Gaga 2.Which psychologist tested classical conditioning with dogs? B. F. Skinner *Ivan Pavlov Igor Pavlov Sigmund Freud 3. Explain the difference between operant conditioning
posted on February 6, 2012 
SCIENCE!!!!!!!!!!!!!!111111
A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
posted on August 29, 2011 
algebra
I believe you get .0030864. solve what's in the parenthesis first then ^2. turn fractions into decimal format then add them and ^2.
posted on August 29, 2011 
Algebra
As time passes, the ticket sales get higher. Each time you plug in different values of X, the day tickets go on sale, your Y value increases.
posted on August 29, 2011 
Algebra
For D)..... Your parabola should be negative because of the 2X^2. SO the parabola when you graph it is a backwards U. The middle of the backwards "U" has a high maximum so your tickets should be at a peak during the middle of the sale.
posted on August 29, 2011 
math
third one is true
posted on August 29, 2011 
science
1meter=1X10^9 nanometers 1meter=1X10^6 micrometers 1meter=1X10^10 Angstrom 1meter=1X10^6 MegaMeter
posted on August 29, 2011 
chemistry
Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add
posted on August 29, 2011 
Chem
oh okay i get it now, thank you! Why did you subtract 1.00 from the abundance though? how do you know?
posted on August 28, 2011 
Chem
(79.904)=(80.9163)(0.4931) + x(0.4931) 79.904=39.90 + 0.4931x 40.004=0.4931x x=81.13amu
posted on August 28, 2011