Tuesday

April 28, 2015

April 28, 2015

Number of results: 49,781

**chemistry**

Precipitation Reactions Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NO REACTION. Express your answer as a chemical equation. Identify all of the phases in your answer. ...
*February 9, 2009 by Jake*

**algebra**

1 A + (B + C)= (A + B) + C associative scalar quantity dot product 2 2 2 3 Two systems of linear equations involving the same variables are said to be _______ if they have the same solution set. set associative equivalent parallel 4 Compute the determinant of : 8 4 3 -2 5 ...
*January 14, 2013 by Mandung*

**Enthalypy Reaction**

What is the standard enthalpy of reaction for the following chemical reaction? CO2(g) + 2KOH(s) --> H2O(g) + K2CO3 (s) Express your answers numerically in kJ.
*September 23, 2008 by Sarah*

**Chem**

Use the reaction that occurs when magnesium burns in oxygen to show how a reaction might be included in more than one category of reaction.
*November 25, 2008 by Bubba*

**chem due soon**

The ΔH of the reaction below is -575.13 kJ. Is this reaction spontaneous? 2ZnS + 3O2 + C → 2SO2 + 2Zn + CO2 A. It is not because the ΔH of the reaction is negative. B. It is because the ΔH of the reaction is negative. C. It depends on the temperature ...
*December 1, 2014 by Daniel*

**Chemistry **

The ΔH of the reaction below is -575.13 kJ. Is this reaction spontaneous? 2ZnS + 3O2 + C → 2SO2 + 2Zn + CO2 A. It is not because the ΔH of the reaction is negative. B. It is because the ΔH of the reaction is negative. C. It depends on the temperature ...
*December 5, 2014 by Morgan *

**STATISTICS**

1. What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? 2. Why is the Central Limit Theorem used? 3. Consider situations in your work or home that could be addressed through a continuous probability ...
*February 2, 2012 by B*

**7th grade health**

Where could i find the correct order of how sound waves or sent to the brain ? thanks
*March 22, 2008 by Kathy*

**Math**

Write the numbers in order of increasing size: 2.25, 2 5/8,2,52,2 4/9 Here is how I answered this question: 2.25, 2 4/9, 2.52, 2 5/8. Is this correct?
*July 16, 2009 by B.B.*

**Math**

Place each of the following sets in ascending order. (smallest to largest) 3/7, -6/7, 1/7, -1/2, 2/7. A) -6/7, -1/2, 1/7, 2/7, 3/7 B) 3/7, 2/7, 1/7, -1/2, -6/7 C) -1/2, -6/7, 1/7, 2/7, 3/7 Is the correct answer A?
*December 2, 2009 by Anonymous*

**information literacy**

which of the following sets of dewey decimal call numbers is in correct order
*December 29, 2011 by Anonymous*

**please help me**

#1. 7 + 3^2 (-5 + 1) ÷ 2. #2. -3x^3 - 4x for x = -1. #3. What is the fractional equivalent of 0.2323...? #4. Which of the following shows the correct order of the given numbers? 1, 1, 1.6
*August 15, 2012 by Morgan*

**Math**

31.4+3x2-5 Using the order of operations, simplify the expression above. Which of the following is correct? A. -21 B. -5 C. 5 D. 9
*July 22, 2014 by J*

**independent clauses**

Select the correct statement a. an independent clause always contains a subject and verb b. an independent clause can be a complete sentence c.an independent clause can be as short as two words: a subject and a verb d. all are correct Answer d select the correct statement a. ...
*June 12, 2013 by Jim Collum*

**math, correction,plz**

can someone correct these for me plz.... Problem#36 Use Property 2 to simplify each of the following radical expressions. Radical (10)/(49) My answer: (radical(2 times 5))/(7) Use the properties for radicals to simplify each of the following expressions. Assume that all ...
*March 10, 2007 by jas20*

**Health economics**

Suppose you are to specify a short-run total variable cost function for a nursing home. Explain the variables you would include in the function. What is the expected relation between a change in each of these variables and short-run total variable costs?
*September 3, 2012 by Mike*

**Statistics**

When ordering vinyl replacement windows, the following variables are specified for each window. Which of these variables is quantitative? A) window style- double hung, casement, or awning B) window style- single pane or double pane C) area of the window opening in square inches
*January 18, 2015 by Macy*

**MATH**

What type of coorelation does this haved) a middle school student's weight and height from birth to present--- NO COORELATION A correlation indicates the degree of linear relationship between two variables. A positive (+) correlation indicates that both variable increase (or ...
*May 24, 2007 by Erin*

**algebra 2**

1. Create a catapult that will be able to launch a bird (tennis ball) into the air. 2. Once built, create a real life situation where you would have to knock down a tower filled with pigs 30 feet away (jenga blocks or toilet paper rolls piled up). a. Launch your bird into the ...
*October 22, 2014 by nikki*

**chemistry**

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH_4NO_3(s) rightarrow NH_4...
*December 19, 2012 by savannah*

**stastics- correlation and regression**

for the table that follows: answer the following questions: x y 1 -1/4 2 -1/2 3 -3/4 4 ? * would the correlation between x and y in the table show above be positive or negative? i think that it would be negative, i am not sure that is correct? * find the value of y in the ...
*October 19, 2010 by mary-please help figure out this problem.*

**science**

An experiment was performed how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount a type of water, the same perking time, and the same electrical source were used. Identifying variables Independent, ...
*September 22, 2014 by Mia*

**chemistry**

33) A first-order reaction has a rate constant of 0.33 min-1. It takes __________ min for the reactant concentration to decrease from 0.13 M to 0.088 M. A) 1.4 B) 0.13 C) 1.2 D) 0.85 E) 0.51 how can i set this up?
*November 1, 2010 by JES*

**Chemistry**

The reaction: 2 HI==> H2 + I2, is second order and the rate constant at 800 K is 9.70 x 10-2 M-1 s-1. How long will it take for 8.00 x 10-2 mol/L of HI to decrease to one-fourth of its initial concentration? can someone please show me how to set this up?
*March 3, 2010 by Bababab*

**Chemistry 12**

given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum
*December 6, 2012 by Patrick*

**Chemistry 12**

given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum
*December 6, 2012 by Patrick*

**PLEASE HELP CHEM!**

2 HgCl2 (aq) + SnCl2 (aq) --> SnCl4 (aq) + Hg2Cl2 (s) Hg2Cl2 (aq) + SnCl2 (aq) --> 2Hg (s) + SnCl4 (aq) For each reaction, write the two half-reactions that make it up and calculate the overall reaction potential by adding the two half-reactions. Each overall potential ...
*April 8, 2012 by Betsy *

**math help needed**

the bookholder company maunfactures two types of bookcases out of oak and walnut. model 01 requires 5 board feet of oak and 2 board feet of walnut. model 02 requires 4 board feet of oak and 3 board feet of walnut. a profit of $75 is made on each model 01 bookcase and a profit ...
*June 6, 2007 by michael*

**English**

What kinds of toppings can people choose for Brussels waffles? 1. People can choose chocolate, ice cream, and fruit. 2. They can choose chocolate, ice cream, and fruit. ------- Are both answers grammatical? Then, which one is a common answer.
*May 21, 2014 by rfvv*

**Chemistry**

Atom-Particle that cannont be divided in half becasue it is in its smallest form. Reactants-Substances that exist before the reaction begins. Endothermic Reaction-take in, or absorb heat energy. Exothermic Reaction- Release Heat energy Inhibitor-makes a reaction slower. Rate ...
*October 8, 2007 by Tom*

**largest possible area**

Again from applications of derivatives.. what is the largest possible area for a right triangle whose hypotneus is 5cm long, and what are its dimensions. Thanks a^2 + b^2 = c^2 3^2 + 4^2 = 5^2 Area of a triangle 1/2 base times altitude hint: base is 3 altitude is 4 The formula...
*November 18, 2006 by Jen*

**math**

Which label describes the following? 3x +6 =10 A). Expression B). Linear equation C). Equation which is not linear
*October 7, 2007 by kayla*

**Algebra**

Is this relationship linear? Tell how you decided. Write the equation for each linear relationship. X 1, 2, 5, 8, 10, 11 Y 1.5, 2.5, 5.5, 8.5, 10.5, 11.5
*January 11, 2010 by Kate*

**Math- Linear Equations**

Do linear equations need to have negative numbers???
*October 19, 2011 by Alice*

**math linear equation**

Solve the linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9.solve for a:b:c
*February 7, 2014 by femi*

**math**

How to write three linear system that are equivalent to the linear system shown? 5x-4y= -3 2x + 7y= 5
*April 9, 2015 by Lyn*

**Intermediate Algebra**

A gardner wants to create a rectangular garden with length of 8x-4y ft. and and width of 5x+9y ft. What is the area of the garden? Be sure to multiply this out, express in simplest correct mathematical form and include units.
*June 6, 2012 by ladybug*

**science experiment**

See the question from earlier regarding how many variables are in the experiment. I think speed of stirring is a variable. So, my answer would be 3 variables. One for water temp., speed of stirring, and the calcium carbonate solubility. Is this right? I don't think speed of ...
*February 13, 2007 by Hailey*

**Math**

Jared drew a scatter plot comparing the number of hours worked and the amount of money earned over the course of a week. He graphed the ordered pairs(number of hours, amount paid)for each day worked. Which of the three scatter plots below most likely represents the data? What ...
*May 6, 2014 by Gwen*

**science**

2Al+3H2SO4--> Al2(SO4)3+3H2 a.)determine the oxidation number of each element in both the reaction and products of this oxidation-reduction reaction of aluminum and sulfuric acid. b.) what element is oxidized in this reaction? c.) what element reduces in the reaction?
*May 3, 2011 by michael *

**Math... Stuck... A little help?**

x cube plus kx plus 9=0 I took it as: x^3+kx+9=0 I answered: If so......... x^3+kx+9=0 Subtract 9 from both sides (Somenoe correct me if I'm wrong, please) which looks like: x^3+kx+9-9=0-9 Now the best part.... finding variables x^3+kx=9 x^3+(k•x)=9 Hmmm... x^3= (x•x•x) x•x•x•...
*November 25, 2014 by Anonymous :D*

**English**

Hello. Please help me to choose the correct (or a better word): The president "offered, proposed, suggested" his program. The verbs look like synonyms. Are all of them possible in this context? Thank you for your help.
*February 3, 2011 by Ilma*

**Grammar (Writeacher)(or Ms. Sue)**

For each of the following sentences, choose the correct verb in parentheses, and write it on your paper. 1. Marines and paratroopers from the United States (was, were) landing in France on D-Day in 1994.
*May 15, 2013 by Anonymous*

**english**

Choose the answer that displays the correct spelling of the plural form of the words in parentheses. Ancient (Roman) used (goose) as (guard) to warn of (enemy) approaching the camp.
*July 5, 2013 by alex*

**Chemistry**

Choose from the list the correct electron configurations for the following ions. A B C D E F G H I J K+ A B C D E F G H I J In+ A B C D E F G H I J Li+ A B C D E F G H I J Na+ A. 1s22s22p63s23p6 B. 1s22s22p63s23p64s23d104p64d105s25p1 C. 1s22s22p63s23p63d104s2 D. ...
*October 20, 2013 by sara*

**chemistry**

"Ag(s) reacts with none of the 4 (solutions of Ag^+2, Pb^+2, Cu^+2, Zn^+2}. So Ag(s) goes at the bottom of the table for now although there may be some metals below silver when you finish with the entire table. Cu(s) reacts with (Ag^+ solution) so Cu goes above Ag ion. It is ...
*April 14, 2008 by Joseph*

**MAth**

Ok so basically we have to choose a topic of interest and then survey it... one that you can obtain numerical data from that has the potential to have responses with a significant amount of variation. and then create a question to ask/investigate. Be sure this question is a ...
*October 7, 2013 by Lululu*

**programming**

create the logic for a program that calculates and displays the amount of money you would have if you invested $5000 at 2 percent simple interest for one year. create a separate method to do the calculation and return the result to be displayed.
*October 28, 2014 by Brian*

**math**

18. Exponential growth follows the formula y= a(1+r)^x and exponential decay follows the formula y= a (1-r)^x. False? 23. In controlled experiments, the researcher is able to find a casual relationship between the variables- True 27. The explanatory and response variables in ...
*June 19, 2013 by mysterychicken*

**w.g**

ship breakers wreck old ships in order to: A)create a light industry B)provide work gor unemployed city residents C)**assist cottage industries D)recycle iron and steel i think thats it but i really think is for them to know whose ship is whose but thats not any of the chooses
*September 24, 2009 by henry*

**stats **

I am having a bit of trouble with the top half of the questions. I have an answer below for questions 5-10, is there anyway you can check those answers and help me with the rest I am having trouble with. Thank you. 1. The area to the right of 1.93 under Student's t-curve with ...
*July 22, 2013 by sandra*

**chemistry**

The formation of nitroanalyine (an important intermediate in dyes, called ‘fast orange’) is formed from the reaction of ortho-nitrochlorobenzene (ONCB) and aqueous ammonia. (See Table 3-1 and Example 9-2.) The liquid-phase reaction is first-order in both ONCB and ammonia with ...
*February 24, 2011 by john *

**Calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...
*April 21, 2010 by Megan*

**calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...
*April 22, 2010 by Megan*

**calculus**

Consider the infinite series of the form: (+/-)3(+/-)1(+/-)(1/3)(+/-)(1/9)(+/-)(1/27)(+/-)...(+/-)(1/3^n)(+/-)... (A) Find x and y from: x(</=)(+/-)3(+/-)1(+/-)(1/3)(+/-)...(</=)y. (B) Can you choose the signs to make the series diverge? (C) Can you choose the signs to ...
*April 22, 2010 by Megan*

**Economics**

I picked C as the answer to this question but I am not sure? The difference between production possibilities frontiers that are vowed out and those that are linear is that: A)bowed out production possibilities frontiers illustrate tradeoffs, whereas linear production ...
*May 6, 2008 by G*

**caculator**

how do you do "choose" on ti-83 calculators? like 5 choose 4
*January 31, 2008 by chris*

**chemistry**

iron+sulphur together are a mixture of small grains yellow and dark grey.Its chemical symbol is 'Fe + S'.When it reacts with oxygen they create a new chemical substance; Iron Sulphide. What do you put for 'explain the reaction using the Big Idea of Energy? :S HELP xxx
*April 10, 2011 by jess*

**Math**

Determine the linear velocity of an object with an angular velocity of 8.1 radians per second at a distance of 10 centimeters from the center. Use pi. Round the answer to the nearest tenth. I got 47, is this correct?
*November 24, 2014 by Anonymous*

**english**

Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. I am in receipt of your order of February 10. B. This letter is to make you cognizant of our receipt of your order. C. Your order of February 10 arrived in our ...
*February 28, 2009 by dj*

**O.Chemistry *****PLEASE CHECK*****!!!!**

Please check these out for me, if I am correct: Match the following statements with SN1 or SN2 reactions: 1) The order of reactivity in alkyl halides is methyl>primary>secondary>tertiary 2) There is an intermediate carbocation 3) The rate-limiting step involves the ...
*March 14, 2008 by K*

**math**

Given the equation - 3x +2y =4. Write another linear equation that will form a linear system with exactly one solution? I usually try to answer b4 i ask question But this time i'm really stuck. plz help ?
*April 15, 2015 by Jay*

**keybording and word processing**

4. If you find a web site that you wish to visit frequently, you should?? a. assign it a web address, b. create a book mark, c. create a hyperlink., d. set up a special folder for it
*June 9, 2008 by Raksha*

**Computer science**

THIS IS C PROGRAMMING I NEED TO CREATE A METHOD! Create a method areaOfaTrapeziod when given a, b, and h (all doubles), will return the area (double) of a trapezoid. Use the equation pictured below. THANKS IN ADVANCE :)
*November 2, 2011 by Nan*

**chemistry**

a certain a digestive reaction, performed at optimum temperature and pH takes 10 minutes to reach completion when performed in the absence of the associated catalyst. How many minutes would the same reaction require if an enzyme that increase the reaction rate one million ...
*April 5, 2013 by meghan*

**Chemistry 30**

Consider the following reaction at equilibrium: 4NH3(g) + 5O2(g) ↔ 4NO(g) + 6H2O(g) In what direction will the following changes force the reaction? a) Addition of O2 b) Reduction of the amount of water vapour c) Increase in the pressure d) Decrease in the volume e) If ...
*September 30, 2014 by Ade*

**algebra**

Identify the vertices of the solution region of the system of linear inequalities. (Order your answers from smallest to largest x, then from smallest to largest y.) x ≥ −2 x ≤ 3 y ≤ 5 y ≥ x (x, y) = (x, y) = (x, y) = (x, y) = Tried several times, ...
*December 4, 2014 by Abby*

**Chemistry**

Time, (min): 0 10 20 30 Moles,(trans): 1.00 0.90 0.81 0.73 Given the following data, what is the order of the reaction? How long will it take for the half of the trans compound to decompose?
*March 24, 2010 by Jamie*

**Science**

N2O5 gives 2NO2 plus 0.5 O2. Rate for first order reaction. K = 5 * 10/10000 R = 0.30 mol/liter after 40 min. What is the [C] of N2O5 and NO2 ?
*December 28, 2012 by JAY*

**managerial economicsQ3**

Suppose the inverse market demand equation is P = 80 ˇV 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal cost of $4 (fixed costs are zero). (a)Write down the profit equations for firms A and B. (b)Write down the...
*September 7, 2008 by jenny*

**WRITING SKILLS **

Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. I am in receipt of your order of February 10. B. This letter is to make you cognizant of our receipt of your order. C. Your order of February 10 arrived in our...
*February 13, 2010 by alia*

**writing skills**

14. Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. Your order of February 10 arrived in our office today. [B. This letter is to make you cognizant of our receipt of your order.] C. I am in receipt of your ...
*July 2, 2012 by jake*

**Grammar-Ms. Sue(:**

12. Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. Please be advised that I've just received your order. B. Your order of February 10 arrived in our office today. C. I am in receipt of your order of February...
*May 9, 2013 by Anonymous*

**Grammar-Ms. Sue(:**

12. Which of the following is the best opening sentence for a business letter that you want to sound fairly informal? A. Please be advised that I've just received your order. B. Your order of February 10 arrived in our office today. C. I am in receipt of your order of February...
*May 10, 2013 by Anonymous*

**Civics**

Why did the framers of the constitution include the system of checks and balances? To ensure the powers of each branch of government are limited and checked by another branch To create a process for the American people to choose their representatives for government branches To...
*January 6, 2015 by jeje*

**math, algebra**

Problem: A formula for a football player's rushing average r with a total of y yards rushed in n carries of the ball is r=y/n. Solve for n. I have no other information this is how its in the book how do i even solve for n if theres no numbers. You don't use numbers. It asks to...
*December 12, 2006 by jasmine20*

**chemistry**

Consider a light-sensitive reaction. What energy, in joules per photon, is needed to drive the reaction if delta H of the reaction is equal to 307kJ/mol?
*October 18, 2008 by kelsie*

**biochemistry**

You have a 100 mMoles of A in the 10 ml reaction mixture which contains buffer and enzyme. The reaction is allowed to reach equilibrium at 25 o C and you measure the concentration of B as 10 mM. What is the delta Go' for the reaction in KJ.
*July 25, 2012 by Sarah*

**chemistry**

Welders often use acetylene torches heat up the metal. The reaction is: C2H2(g) + 2.5O2(g) = 2CO2(g) + H2O(g) Calculate the ΔH of reaction for this reaction.
*January 31, 2015 by danny 16*

**Chem Check Please!!!**

1) As bound ligands, which of the following causes the largest splitting of d-orbitals? a. phen b. H2O c. I– d. CN– e. C2O4^2– Answer D 2) The spectrochemical series a. lists ligands in order from monodentate to hexadentate. b. lists ligands in the order of their ...
*May 6, 2014 by Anonymous*

**The Odyssey and Orestia**

Hi. I need some help with a few questions regarding The Odyssey and Orestia. (I have eliminated some of the possible choices because I know they are incorrect) 1.How are the endings of both the Odyssey and the Orestia similar? A.In both cases, the goddess Athene steps in to ...
*November 22, 2014 by Dennis*

**college statistics**

I am having a bit of trouble with the top half of the questions. I have an answer below for questions 5-10, is there anyway you can check those answers and help me with the rest I am having trouble with. Thank you. 1. The area to the right of 1.93 under Student's t-curve with ...
*July 18, 2013 by penelope*

**Biology**

Arrange the following in correct order in food chain- Fish,Plankton,Shark,Crab
*March 3, 2012 by Zoopy*

**thank u writeacher**

correct sentence: arent these all questions: A)whom needs a ride to the concert? b}for who this letter is? C)whom are we following? D)to who does that dog belong? i choose a.
*July 17, 2009 by henry*

**maths**

Choose the option that gives (correct to two decimal places) the area of the region which is bounded by the x-axis and by the graph of y =(20(7 − x)(x − 3))/x^2 . Options A 0.47 B 1.31 C 2.09 D 3.76 E 5.12 F 6.55 G 8.20 H 9.46
*May 11, 2011 by albert*

**English**

11. Choose the plural noun that's spelled correctly. A. Fathers-in-law B. Editor in chiefs C. Phenomenons D. Pianoes I selected (A) for the answer, is this the correct answer?
*December 19, 2011 by Sis*

**math help**

An engineer is required to survey a nonrectangluar plot of land but is unable to measure side UT directly. The followng data are taken; RU=130 meters, RS=12m ST=90m, angle RST=115, and angle RUT=100. Calculate the length of side UT and the area of the plot. The picture is a ...
*January 12, 2008 by julie*

**Chemistry**

Delta H is 20.1 kJ/mol and Delta S is 45.9 J/(mol-k). Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction? Is the reaction spontaneous for temperatures less than or greater than the solved ...
*March 9, 2012 by Katherine*

**math**

A rectangular plot is bounded at the back by a river. No fencing is needed along the river and there is to be an opening in front of about 24 meters. If the cost of fencing in front is $1500 per meter and the cost of fencing the sides is $1000 per meter, find the dimensions of...
*April 25, 2013 by natasha*

**Math**

Gray bought two plots of land for a total of 120000 on the first plot she made a profit of 15% on the second plot she made 10% profit her total profit 5500, how much did she pay for each piece of land? (And please show the full procedure of the math even the rough work as well...
*October 18, 2013 by URGENT Help Need by 22.10.13*

**Physics**

With your equations, I solved for the two unknown variables and got the correct answers for the forces. Thanks! Unfortunately, I don't really understand how you came up with those two equations in the first place. I set up a diagram and selected a pivot point force the forces...
*March 10, 2008 by Jessica*

**chemistry (please check/help)**

How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. Volume variables (x) mL 0 1 3 1 10 30 100 We starting out with 100mM of X which would be considered its concentration. In order to describe how to do ...
*January 28, 2007 by tatiana*

**Algebra**

There are 15 people to choose from for a nine-person batting order in a baseball team. In how many ways can the people be arranged in the lineup? Is it 1,816,214,400? 2. A basketball team consists of 12 people. How many lineups of 5 people can be selected? Is it 792?
*May 13, 2014 by Anonymous*

**Chemistry**

In solution, hypochlorite ion is known to decompose with a second-order rate law. If [ClO-]0 = 0.0570 M and k = 2.06x10-4 M-1·min-1, calculate the half-life for this reaction 2ClO- 2Cl- + O2.
*September 6, 2012 by Amber*

**Math**

Can in a Cone Find the volume of the largest can that can fit entirely under a cone with volume 900 cubic cm. 1.draw pictures of at least THREE different cases (including the endpoints if any). 2. define all variables CLEARLY (with words) and then use those variables ...
*March 11, 2013 by jonh*

**Math**

Can in a Cone Find the volume of the largest can that can fit entirely under a cone with volume 900 cubic cm. 1.draw pictures of at least THREE different cases (including the endpoints if any). 2. define all variables CLEARLY (with words) and then use those variables ...
*March 14, 2013 by jonh*

**chemistry**

I need to find out which structure is more correct: Reaction of the compound C3H8O with CrO3 (oxidizing agent) yields acetone. Which of the three structures is more correct? (My three structures are as follows: 1-propanol, 2-propanol, and methylethyl ether.)
*January 18, 2011 by ella*

**Math**

A state lottery requires you to choose 4 cards from an ordinary deck: I heart, 1 club, 1 diamond, and 1 spade in that order from the 13 cards in each suit. If all four choices are selected by the lottery, yo win $5,000. It costs $1 to play. Find the expected payback.
*April 2, 2013 by Devin*

**Math**

1) An aerobics class is being offered at the ABC body gym. Nonmembers pay $4 per class while member pay a monthly fee of $10 plus $2 per class. a. Create a linear system to represent the two options. b. At how many classes will the cost be the same? What is that cost? c. When ...
*October 13, 2014 by Kevin*

**linear programming**

Exeter Mines produces iron ore at four different mines; however, the ores extracted at each mine are different in their iron content. Mine 1 produces magnetite ore, which has a 70% iron content; mine 2 produces limonite ore, which has a 60% iron content; mine 3 produces pyrite...
*May 20, 2012 by alia*