chels
Most popular questions and responses by chels
Chemistry
A solution has a pH of 3.90. What is the hydroxide ion concentration? I know that I need to find H30+ first but my teacher doesn't allow calculators on the test. So how would I find the answer WITHOUT a calculator?
asked on November 15, 2012 
Physics
A 0.53kg billiard ball initially at rest is given a speed of 12 m/s during a time interval of 4.0 ms. What average force acted on the ball during this time?
asked on March 1, 2010 
Chem
Which of the following solutions would require the greatest volume of 1.0M NaOH for complete neturalization? a)10.0ml of 1.0M HCl b) " of 2.0 M H2S04 c) " of 3.0M H3P04 d) " of 4.0M H2C204 I don't understand what to do to solve it.
asked on December 15, 2010 
Algebra 2
An icecream parlor sells sundaes with 3 different types of icecream and 4 different toppings. They have 8 flavors of icecream and 10 toppings for their customers to chose from.what is the probability that a customer orders a sundae including chocolate
asked on May 24, 2012 
math
Zared plays basketball on his high school team. One of the things he needs to practice is his free throws. On his first shot, there is a probability of 0.6 that he will make the basket. If he makes a basket, his confidence grows and the probability he
asked on February 19, 2016 
science
In the following equation , 417.96 g of Bi reacts completely with 200 g of F . How many grams of BIF (to the third power) are formed?
asked on November 29, 2016 
U.S History
Why were the Vietcong so successful against the United States? A.The Vietcong held the strategically important Ho Chi Minh Trail. B.U.S. troops could not engage the Vietcong in traditional warfare. C.Vietcong forces had superior weapons and military
asked on February 25, 2013 
math
you purchase a bicycle with a retail (pretax) price of $760. the local sales tax rate is 7.6%. what is the final cost
asked on January 28, 2016 
Math
Two teams, the Exponents and the Radicals, square off in a best of 5 math hockey tournament. Once a team wins 3 games, the tournament is over. The schedule of the tournament (for home games) goes: ERERE If the Exponents are playing at home, there is a
asked on February 18, 2016 
Algebra 2
I=2V/R+2r Solve for r.
asked on April 5, 2012 
Help
dissonance : resonace :: harh : rich music : polyphony polyphony : instrument cacophony : telepragh I presume you mean "harsh" not harh. So, to do an analogy, you really need to understand the meanings of all the words involved. Do you know what dissonance
asked on January 28, 2007 
accounting
Postclosing trial balance What am I supposed to do when the balance is not equal? As in credits do not match debits. I follow the instructions in the book but no matter what it just does not match, even if i do all the debits on one side and all the
asked on February 20, 2008 
statistics
The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated by a normal distribution with a mean value of 120 sec and a standard deviation of 25 sec. The fastest 10% are to be given
asked on April 8, 2011 
Chem 219
If 48.9g of barium chloride dihydrate, BaCl2.2H20, was treated with excess silver nitrate solution. (show formula) a). how many moles of silver chloride precipitated? b). how many grams of silver chloride precipitated? thank you!
asked on February 8, 2011 
Algebra 2
half life carbon 14 is 5,730 years. If you start out 50 grams, how long will it take until it reaches 2 grams?
asked on May 20, 2012 
maths
San Jay is 2 years younger than Sara. Who is 5 years old than Sasha. San Jay age and Sasha s age total 31. How old is Sara?
asked on August 2, 2015 
Math Probability
We have looked at the probability that two nonmutually exclusive events A or B can happen in this learning experience. We will take it one step further and look at the probability that event A or B or C will happen. The formula is: P(A or B or C) = P(A) +
asked on February 20, 2016 
Algebra 2
two resistors are connected in parallel. Their resistances are 8 ohms and 17 ohms. What is the resistance (R) of the combination? R=ohms
asked on April 6, 2012 
Tx. History
What was the American experience?
asked on November 18, 2010 
Physics
Pulling the string on a bow back with a force of 28.7 lb, an archer prepares to shoot an arrow. If the archer pulls in the center of the string, and the angle between the two halves is 138*, what is the tension in the string?
asked on March 8, 2010 
Physics???
When the air temperature is below 0 C, the water at the surface of a lake freezes to form a sheet of ice. If the upper surface of an ice sheet 24.2 cm thick is at 10.7 C and the bottom surface is at 0.00 C, calculate the time it will take to add 1.80 mm
asked on December 4, 2007 
health
the ability to gather, understand, and use health information to improve your health
asked on January 28, 2010 
Algebra 2
what is the opposite of 49x^2y A. 49x^2y b. 49x^2y c. 1/49x^2y d. 49/x^2y
asked on April 9, 2012 
chemistry
What is the number of moles of NaOH in 1.91 mL of a 872.25 molar solution?
asked on October 19, 2011 
spanish
La cocina esta muy sucia. Tu padre dice estas lavando los platos lavan los platos lava los platos y saca la basura Estas sacando la basura
asked on May 20, 2008 
Advanced Math
Find the measure of the reference angle for 400 degrees. How would I do this?
asked on May 17, 2008 
Algebra 2
I=2V/R+2r Solve for r. simplify
asked on April 6, 2012 
Microbiology Please Help Anyone
You wish to study a variant [a close relative] of the Tobacco Mosaic virus. Specifically you want to characterize the capsid and genetic component as well as determine the viral load required to cause a disease state. a. What methodologies might you use to
asked on November 7, 2010 
Accounting
A deposit of $1,250 that was incorrectly in the checkbook as 1,200 should be a. added to the checkbook b. deducted from the cheeckbook c. added to the bank statement balance d. deducted from the bank statement balance ok so I know for sure its not c or d
asked on February 13, 2008 
Trigonometry
Which Triangle has 2 solutions? a. A=130 degrees, a=19, b=11 b. A=45 degrees, a= 4(sqrt 2) b=8 c. A=32 degrees, a=16, b= 21 d. A=90 degrees, a=25, b=15 I really don't know how to do this one so I can't put what my answer is.
asked on November 26, 2007 
math
I have fewer ones than tens. The value of my tens is 20. What two numbers can I be?
asked on August 27, 2013 
Algebra 2
Use the associative property of multiplication to write an expression equivalent to 8x*(4y*7z)
asked on April 9, 2012 
Economics
A buyer is usually not willing to spend a lot of time and energy researching the market when: c. savings to be made are small or d. prices vary but quality is still the same I read the text but I couldn't really find this exactly, both answers seem like
asked on January 23, 2008 
Radicals
How do you graph y>= sqrt(3x+12) Show how to get certain points.
asked on November 6, 2007 
Algebra 2(graphing)
Solve 2x^2=3x+2 by graphing. If exact roots can't be found, state the consecutive integers between which the roots are located. Can you show how to do this step by step?
asked on November 6, 2007 
Algebra 2(quadratic)
Use the value of the discriminant to determine the number and type of roots for the equation: (x^2+20=12x16) 1 real, irrational 2 real, rational no real 1 real, rational
asked on November 3, 2007 
algebra 1
v(v3)= v^2+6 Does any one know if this is in the quadratic form or not The v^2 means v second power No it is not. Please read: http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut20_quadform.htm
asked on November 13, 2006 
Algebra 2
A company can produce Tshirts for $0.99 each. They spent $1,000,000 on their building and machines. What is the horizontal asymptotes of the graph that models the average cost of each t shirt, including the start up cost?
asked on May 22, 2012 
Algebra 2
I=nE/R+nr Solve for R. Simplify
asked on April 5, 2012 
chemistry
What is the number of grams of KCIO3 to make 750 mL of 0.227 M?
asked on October 1, 2011 
Math
My qestion is how do you find out how many degrees of latitude separtae each other. For example How many degrees of latitude separate (45N, 65W) and (32S, 65W)? Thanks for your help
asked on April 20, 2011 
Microbiolgy Please Help!
You wish to study a variant [a close relative] of the Tobacco Mosaic virus. Specifically you want to characterize the capsid and genetic component as well as determine the viral load required to cause a disease state. a. What methodologies might you use to
asked on November 6, 2010 
chemistry
what happens when you place sodium hydroxide and water into a calorimeter?
asked on March 21, 2010 
science
what are all of the formulas for physical science?
asked on January 25, 2010 
Precalc
Simplify i^51 Im really not sure what they are saying. i to the 51ith power? Wouldnt it already be simplfied or what. It doesnt make sense to me.
asked on May 25, 2008 
Physics
Doubling the amplitude of a wave will double the amount of energy the wave can transfer. true or false Is it true? That's what I think but I am not that good at this sort of thing.
asked on May 6, 2008 
philosophy
Beautiful harmony comes from things that are in opposition to one another [Heraclitus ok i need to write my personal philosophy and i cant think of any examples of this quote for my body pargraphs...except velcrow..i don't think that a good one thought
asked on December 13, 2007

L.A help please
D, D, B. Got a 100%
posted on December 19, 2018 
algebra graphing
Itâ€™s for halving fun
posted on April 13, 2018 
math
A ) 10*6 = 60 10*6= 60 60+60 = 120 20 heaps
posted on November 29, 2016 
Chem
A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 mL. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000
posted on August 31, 2016 
math
No, for the tree I start with a branch of 0.6 and 0.4 and from there branch off to .35,.45,.55, and .65?
posted on February 20, 2016 
Chemistry
37.5ml 1L .152 mol NaCr 1 mol AgNO3  10^3ml 1L 1 mol Na2cr 1 L 25ml  1 mole AgNo3 10^3ml
posted on November 15, 2012 
Algebra 2
I tried that already, it didn't work.
posted on May 24, 2012 
chemistry
Ni with +2 electron
posted on February 9, 2011 
Chem 219
thank you for your response, I think I can solve the stoichiometry, the main issue for me is trying to set up the formula. do you think could help me try to set up the formula? the components confuse me.
posted on February 9, 2011 
Chemistry
Molar Mass of KCLO3 (potassium chlorate)= 39.10+35.45+3(16.00)=122.55 First use what you are given, then use the mole to mole ratio to cancel out moles KClO3 and multiply keeping mol O2. (12.00 moles KClO3)x(3 mol O2/2 mol KClO3) =18 moles O2 :D
posted on February 9, 2011 
Chem
So would the answer be c because it has 3 times the H+?
posted on December 15, 2010 
Tx. History
I know like the Americas/us wanted to take over the Mexians territory which was Texas or something like rhat.
posted on November 18, 2010 
Tx. History
For the Mexicans and The us. Around early 1800s in Texas
posted on November 18, 2010 
spanish
No I know what it says but the first is the question and the others are the answer choices. They didn't seem to make sense to me, like none of them were right
posted on May 20, 2008 
Accounting
Yeah I know that's why Im confused.....I know how to use and balance a checkbook but these are the only choices they gave me.
posted on February 13, 2008 
accounting
This is what my book says The first step in closing is to transfer the balance of the revenue account to Income summary, the balance is found in the Income Statement section of the work sheet Then to record into the general journal 1. Enter "closing
posted on February 13, 2008 
Physics???
if anyone checks thisplease help!!!! please!!
posted on December 5, 2007 
Algebra 2(check pt 4)
I am so stuck on these same exact problems on my Algebra 2 test.
posted on October 18, 2007