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December 20, 2014

Posts by Michelle


Total # Posts: 1,670

Chemistry- DrBob222
0.2g of an organic sample W, analysed by combustion analysis results in 0.48g of CO2 and 0.1636g of H2O. We had a second sample 0.2g of W again producing 0.0618g of ammonia. Show that only C, H and N exist in W and find its emperical formula.
November 30, 2013

Chemistry- DrBob222 Urgent Please help
Name these: a) CH2=CH-CH=CH2 b) CH3-CH=CH-C(TRIPLE BOND)CH c) CH3-CH2-CH2-CH(Cl)-CH(Br)-CH3
November 26, 2013

math
31divided by 5,087
November 14, 2013

Chemistry- DrBob222
Can you please write the isomer name though? I will draw it from that. Write an isomer of structure for a), b) and c) and name them. a) 3,3-dimethylpentane b)3-methyl-4-ethyl-1-hexyne c)3,3,4-trimethyl-1-pentene
November 13, 2013

CHEMISTRY PLEASE HELP
Write an isomer of structure for a), b) and c) and name them. a) 3,3-dimethylpentane b)3-methyl-4-ethyl-1-hexyne c)3,3,4-trimethyl-1-pentene
November 13, 2013

CHEMISTRY PLEASE HELP
disregard this question. I posted it in a better form further up.
November 13, 2013

CHEMISTRY PLEASE HELP
Write an isomer of structure for a), b) and c) and name them. *(N.B- ! rep. a bond) a) CH3 ! CH3-CH2-C-CH2-CH3 ! CH3 CH3 ! b) CH3-CH2-CH-CH-C(TRIPLE BOND)CH ! CH2 ! CH3 c) 3,3,4-trimethyl-1-pentene
November 13, 2013

chemistry
How do you draw the structure of the reaction of 1-hexene with h2o in the presence of acid
November 13, 2013

Finance
A 10-year bond has a coupon rate of 7% annually and a principal payment of $1,000.0. Other similar bonds are paying 9% annually. To determine the value of the bond you must find the interest factors, IF. at: A. 9% for 10 periods B. 9% for 20 periods C. 4.5% for 20 periods D. 4...
November 10, 2013

CHEMISTRY
Why is the atomic emission spectrum of hydrogen composed of lines? What does each line indicate? Why do the lines become closer together from left to right in a typical diagram?
November 5, 2013

math
Solve a. log a = 3 b. log 1,000 =a c. loga = –2
November 4, 2013

finance
Which of the following is true with regards to rising interest rates. A. Use long-term loans to take advantage of current low rates. B. The term of the loan is ot impacted by rising interst rates. C. Use short term loans to take advantage of low iterest rates. D. Select long-...
November 3, 2013

Finance
which of the following is true with regards to rising interest rates? A. Use Long-term loans to take advantage of current low rates. B. The term of the loan option is not impacted by rising interest rates. c. Use Short-term to take advantage of low interst rates. D. Select ...
October 31, 2013

Finane
C. Interst rate risk
October 31, 2013

Finane
The possibility that the fed may raise the discount rate is an example of A. Political Risk B. Exchange rate risk c. interest rate risk d. liquid risk
October 31, 2013

Fianace
A 10-year bond has a coupon rate of 7% anually and a principal payment of $1,000.00. Other similar bonds are paying 9% annually. To determine the value of this bond you must find the interest factors, IF. at: A. 9% for 10 periods B. 9% for 20 periods C. 4.5% for 20 periods d. ...
October 30, 2013

Chemistry
Having some difficulty with this question. Can anyone help me please? Thank you in advance for your time. 85 microliters of acetophenone (120.15 g/mol, 1.03 g/ml) was reacted with 3.0mL of aq NaOCl (5% available chlorine) to give 72mg of benzoic acid (122.12 g/mol) as a white ...
October 28, 2013

CHEMISTRY URGENT
Does anyone have a "Chemistry in Context 6th edition" by mcgraw and hill book? I don't have one and my homework is in there. Page 30, questions 5,6 & 7. If you could, type out the questions for me that would be a HUGE help.
October 25, 2013

Chemistry
Calculate the mass of AgCl that will dissolve in 100ml of 2 M NH3 ksp AgCl = 1.7x10^-10 and Kf of Ag(NH3)2 = 1.6x10^7
October 25, 2013

Personal finance
Josh has decided to take a course at the local community college that could help him get a promotion at work. The course begins at 5pm and goes until 9pm on monday nights. Josh normally works until 5pm each day, but because of the drive time he will leave work at 3pm on class ...
October 24, 2013

personal finance
which of the following is a credit management decision? a. Purchasing a used car. b. investing your savings in a stock market c. obtaining a student loan to attend college d. putting money into your retirement account
October 24, 2013

Business English
It is the case that good communicators advance more quickly in the company. Which of the following would be the best revision of this sentence?
October 17, 2013

maths
a flagpole cast a shadow 18m long when the altitude of the sun is 54 degrees.what is the height of the flagpole
October 10, 2013

Human and Social Biology
Describe how social biologist may help to solve the the problems of lack of houses a nd problem ooof sanitation
October 8, 2013

Chemistry
How many years will it take for 88g tritium to decay to an 11g sample?
October 6, 2013

Physics
A rocket of 500 kg accelerates away from earth with an engine thrust of 13,500 N. a) what is the weight of the rocket? 4900 N b) how fast did the rocket accelerate? (I know the answer is 17.2 m/s^2 but how did they get that?)
October 5, 2013

Math
When they dial 3 and turn the oven on, it is like pushing the old button 3 times. That means if they start with one pizza in the oven, dial 3, and turn the oven on, they will get 27 pizzas. (33 = 27) Then if they dial -3 and turn the oven on it is like flicking the old switch ...
September 30, 2013

Math
Chen’s father was 25 when Chen was born. In 5 years Chen will be exactly half his father’s age. a. Try to figure out how old Chen is now. Describe how you got your answer. b. Now solve the problem using equations.
September 30, 2013

Algebra
The Big Screamer Coaster carries 92 people altogether. Some of its cars carry 4 passengers, and the rest carry 6 passengers. There are three less 6-passenger cars than 4-passenger cars. How many 4-passenger cars are there? Please help!
September 26, 2013

physics
A car exciting the highway moving at 27 m/s slows down at the rate of 3.5 m/s^2 to a final velocity of 18 m/s. Calculate the distance the car travels while braking?
September 26, 2013

Math
Steve has the correct solution, but the method used in the Common Core lesson involves proportions. The current ratio of maple to oak trees is 3:11 and there are now 132 oak trees. 3 maple trees X maple trees ------------- = --------------- 11 oak trees 132 oak trees using ...
September 19, 2013

Finance
Chip’s Home Brew Whiskey management forecasts that if the firm sells each bottle of Snake-Bite for $20, then the demand for the product will be 15,000 bottles per year, whereas sales will be 91 percent as high if the price is raised 18 percent. Chip’s variable cost ...
September 13, 2013

Chemistry
Calculate the volume of 5.6 kg of ethanol that has the density 0.785 g/cm3
September 10, 2013

human physiology
Please help, with the following question: "When an enzyme reaches its saturation point,..." A) the amount of substrate for the enzyme to act upon is very high B) the amount of substrate for the enzyme to act upon is very low C) the amount of product produced ...
August 27, 2013

algebra
A customer is buying a $100 drill and two $15 drill bit sets. The customer uses a gift card worth $50 to pay for a portion of their bill. How much cash will the customer pay (before taxes)?
August 20, 2013

Trig hep, please? Thank you!
I will try the others soon.
August 17, 2013

Trig hep, please? Thank you!
thanks! what do the question marks stand for. and also CAST?
August 17, 2013

Trig hep, please? Thank you!
1. Find the exact value of sin(195(degrees)) 2. If cot2(delta)=5/12 with 0(<or =)2(delta)pi, find cos(delta), sin(delta) , tan(delta). 3.find the exact value of sin2(x) if cos(x)= 4/5. (X is in quadrant 1) 4. Find the exact value of tan2(x) if sin(x)=5/13. ((X) in quadrant ...
August 17, 2013

Finite math
$5.491921.88
July 28, 2013

Science
A thin plastic blanket, with a shiny metallic surface, is wrapped a walker who has collapsed after a steep climb. Which type of heat loss is the shiny surface intended to reduce?
July 20, 2013

Chemistry
Which statement about resonance structures is TRUE: 1) There can never be more than two resonance structures for any molecule. 2) Only ionic compounds use resonance structures 3) The real structure of a molecule is an average or hybrid of the resonance structures 4) Resonance ...
July 19, 2013

finance
Tangshan Mining is considering issuing long-term debt. The debt would have a 30 year maturity and a 12 percent coupon rate and make semiannual coupon payments. In order to sell the issue, the bonds must be underpriced at a discount of 2.5 percent of face value. In addition, ...
July 15, 2013

leadership
Prior to the industrial revolution the study of leadership relied on a scientific studies b. intuition and description c. case analyses d. the trait approach to understand leaders
July 13, 2013

chemistry
In my experiments I mixed different ratios of CuSO4 and NaS. The ratio in which I had the greatest amount of precipitate was when I mixed 3mL CuSO4 : 3mL NaS. Now my question: What is indicated by the maximum amount of precipitate...? Thanks in advance.
July 10, 2013

Com200
One reason language is so powerful is that it is the means by which you construct your reality. T or F I believe the answer is true.
July 10, 2013

Chemistry
Calculate the ph of a buffer made from 0.25 m NH4Cl and 0.42 M NH3. Kb= 1.8 x 10^-5
July 10, 2013

science
give the value of acceleration due to gravity
July 9, 2013

chemistry
What are the spectator ions in the following complete ionic equation: Ba2+(aq)+2I−(aq)+2Na+(aq)+SO2−4(aq)→BaSO4(s)+2I−(aq)+2Na+(aq). Thank you so much!!!
July 8, 2013

chemistry
Ba2+(aq)+2I−(aq)+2Na+(aq)+SO2−4(aq)→BaSO4(s)+2I−(aq)+2Na+(aq)
July 8, 2013

math
how do you factor this: 5p + 15q
June 28, 2013

Math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 7x^3 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

Math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 4 − 6x + 7x2 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 2x/x-7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = x/x+6 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

MAth
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 2/x+5 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

Math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 17 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

math
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = x^2+7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

mah
Find f(a), f(a + h), and the difference quotient f(a + h) − f(a) ------------------ h , where h ≠ 0. f(x) = 6x + 7 f(a)= f(a + h) = f(a + h) − f(a) ----------------- = h
June 13, 2013

Physics
If an object on Pluto has a mass of 10 kg and a weight of 6.6 N, what is the acceleration due to gravity at its location?
June 11, 2013

Algebra
The work and solution to: Stefan is bicycling on a bike trail at an average of 10 miles per hour. Erik starts bicycling on the same trail 30 minutes later at 16 miles per hour. How long will it take Erik to pass Stefan?
May 29, 2013

language (sentence fluency)
D, read them aloud to make it easier
May 28, 2013

Math
(1/2)2+1/2* 2 4/5
May 28, 2013

physics
A 156-kg coil of sheet steel is 0.80 mm thick and 50 cm wide. How long is the steel in the coil?
May 26, 2013

world geography
commercial areas
May 19, 2013

Algebra 2
I need help trying to solve trigonometric identity problems I just need help if someone could break it down step by step how to solve for: if cos of theta is -3/5 find csc of theta
May 9, 2013

CHEM
How many liters of O2 will react with 100 liters of H2 according to the gas phase reaction: O2 + 2H2 ------2H2O
May 3, 2013

Algebra 2
2. The lengths of boats in a harbor, in feet, are listed below. 17, 16, 56, 50, 14, 30 12, 33, 82, 16, 10, 52 25, 25, 19, 75, 24, 12 30, 12, 20, 38, 26, 36 33, 24, 18, 26, 40, 40 a. Make a frequency table for the data set. Use 5–14 as the first class interval. b. Use the ...
May 3, 2013

pre calculus
use the rational zeros theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers: f(x)=x^4+2x^3-7x^2-8x+12 I am totally lost, please help?
April 29, 2013

Chemistry
The second one you had described turned out to be the answer.
April 21, 2013

Chemistry
Write an equation that represents how dihydrogen phosphate ion (H2PO4-) behaves as an Arrhenius acid. ( Be sure to include the correct charges for ions.)
April 21, 2013

Chemistry
Write an equation showing that calcium hydroxide acts as an Arrhenius base in water. **(I'm not sure where to start or how to go about this question)
April 21, 2013

Chemistry
I have come up with a product of HCl_2O^+ + )H^- But that wasn't correct neither was HClO^+ + OH^-
April 21, 2013

Chemistry
Write the product for the reaction when dichlorine oxide (Cl_2O) reacts with water (the product will have only one equivalent of chlorine in it).
April 21, 2013

Chemistry
A 19.9mL volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate, producing 183mL of CO2 that is collected over water at 24.0 degrees C and 738 torr total pressure. The vapor pressure for water at 24.0 degrees C is 22.39 mmHg. What ...
April 18, 2013

english
Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. Writing a research paper sounds difficult.
April 18, 2013

social studies
john cabot laid claim to the newfoundland region of canada for______ in 1497.
April 7, 2013

Earth science
Waste produced by people along the East Coast of the United States has been dumped into the Atlantic Ocean where it is distributed by surface ocean currents. Which coastal area is most likely to become polluted by this waste?
April 2, 2013

Statistics
Two cards are drawn from an ordinary deck of cards, and the first is not replaced before the second is drawn. What is the probability that one card is an ace and the other is a king
April 2, 2013

Biology
I'm doing a lab for gel electrophoresis and we added the digests in the wells of the agarose gel Lane 2 – λ Hind III (a standard) Lane 4 – Tube 1 Lane 5 – Tube 2 Lane 6 – Tube 3 Lane 7 – Tube 4 Now will DNA in tube 1 which only has dh20, 10x ...
April 2, 2013

pre calculus
steve....that site isn't working for me! Nicole....what do I do once I evaluate 1/121x?
April 2, 2013

pre calculus
2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and range. y= -2 lxl +2 For example, if you were asked to graph y= x^2 + 1 using transformations, you would show the graph of y= x^2 and the graph shifted ...
April 2, 2013

Chemistry
which molar mass do you use? pb(OH)2 or pb2+?
April 1, 2013

Physics
Question 2. 3 Consider a box that explodes into two pieces while moving with Fig. 9-24 a constant positive velocity along an x axis. If one piece, with mass : m1, ends up with positive velocity v1, then the second piece, with : mass m2, could end up with (a) a positive ...
April 1, 2013

Science Physics
So weight is mass times gravity On earth, w(12N) = m*10m/s2. Solve for mass. Mass= 1.2N Use that to find mars' gravity. 4.8= (1.2)*g Solve for g. G= 4m/s2
April 1, 2013

Math
1mile * $2.25= $2.25 Remaining miles are 4.2 which is 42 tenths of miles. 42*.15= $6.30 Total for ride is 6.30 + 2.25= $8.55 He paid $10, so 10-8.55=$ 1.45 which is the change or can be called the tip. 2trillion = 2,000,000,000,000 750 billion= 750,000,000,000 Subtract 2,000,...
April 1, 2013

Math: Finding m<A
ABC~DEF m<B = 25', m<D = 45', m<E = 25' How do find m<A?
March 29, 2013

Geoometry Help: Find EF
Thank you so much. Saved me from a big mistake :)
March 29, 2013

Geoometry Help: Find EF
ABC~DEF AB = 36, BC = 24, DE = 48 m<B = 110', m<E = 110' EF = ? I think it's 68. Yes? Or is something else?
March 29, 2013

chemistry
What will be the fastest reaction if a strong base, such as sodamide, reacts with a secondary alcohol, such as (2S)-butanol? a) deprotonation of the alcohol b) substitution with racemization of stereochemistry c) elimination to form the more substituted alkene d) substitution ...
March 29, 2013

achieving academic execellence
Becoming a discerning consumer of research is something you can achieve be practicing good research skills and using your A. critical thinking B. education C. resources D. college library
March 26, 2013

chemistry
provide the appropriate IUPAC name for the following alcohol. designate e or z 8 carbon chain double bonds between 4 and 5 and 6 and 7 methyl group on 6 OH on the second carbon [the only hint i got from this homework is to begin my answer with octadien-2-ol. can someone help ...
March 25, 2013

chemistry quick question
i just realized after entering my question my structure did not stay the way I wanted it to. the CH2 and OH are supposed to be over the 4th carbon in the chain and the CH3 is supposed to be under the 3rd.
March 25, 2013

chemistry quick question
I need help with something and can't find this anywhere online. my structure looks like this OH CH2 CH3CH2CH2CHCHCH2CH3 CH3 So that OH looks like it is on a ethyl group. I need to write the IUPAC name and I wrote 3-methyl-4-heptanol but realized my mistake as that would ...
March 25, 2013

organic chemistry
thank you for helping me, but since this question totally confuses me how did you get to this answer?
March 21, 2013

organic chemistry
can anyone help me please?
March 21, 2013

organic chemistry
which of the following represents the best strategy for synthesizing 2-butanol, CH3CH2CH(OH)CH3 a) CH3CH=CHCH3 + [H30]+ b) CH3CH2C (triple bond) CH + [H3O]+ c) CH3CH=CH2+ [CH3OH2]+ d) CH3C (triple bond)CCH3 + [H3O]+
March 21, 2013

Speed'Distance'Time
Determine the time taken when, distance is 7150 km and speed is 780 km/hr.
March 19, 2013

Speed'Distance'Time
Find out the distance covered when, speed is 960 km/hour and time is 1 hour 50 minutes.
March 19, 2013

Physics
A 500 kg elevator starts from rest. It moves upward for 4.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this power compare with the motor power when the ...
March 16, 2013

Physics
Sewage at a certain pumping station is raised vertically by 5.57 m at the rate of 1 860 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter. (a) Find the output mechanical power of the ...
March 16, 2013

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