Wednesday
September 17, 2014

Posts by sandra


Total # Posts: 874

Chemistry
25g of ethanol is dissolved in 1.50 kg of whater. what will the boiling point of the solution be?
May 13, 2012

Information Literacy
#2 is wrong. just took the test
May 12, 2012

Information Literacy
2 is wrong just took the test
May 12, 2012

science-biology
can anyone help me by finding which enzymes are present in carbohydrates? is it salivary amylase(tyalin)
May 12, 2012

Chemistry
A system is represented by the following equation: 2A(aq) + B(aq) --> 3C(aq) At equilibrium, [C]=0.6 M. Calculate the value of K if initially 1 mol of A and 2 mol of B were placed in a 1 L flask.
May 11, 2012

Chemistry
A 100 mL container is filled with 0.01 mol of A2B3. At equilibrium, it also contains 0.006 mol of B. Find the value of K. A2B3(g) --> 2A(g) +3B(g)
May 11, 2012

Chemistry
5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A(g) + B(g) --> 3C(g) At equilibrium, there is 4.8 x 10-5 mol of B. Calculate the value of the equilibrium constant.
May 11, 2012

Math---helpppp
1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function
April 28, 2012

Math-Functions
1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function
April 27, 2012

Math-Funtions
1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function
April 27, 2012

Life orientations
Global warming can be a problem
April 24, 2012

life orientation
Global warming
April 20, 2012

biology
thank you maam
April 19, 2012

biology
please help me by answering these questions: 1)how many salivary glands are present in our body? 2)what are the names of those salivary glands?
April 19, 2012

Biology
thank you for helping me
April 19, 2012

Biology
can anyone help me by defining what is holophytic? please
April 19, 2012

pre-cal
thank you very much
April 18, 2012

pre-cal
find an equation for the hyperbola vertices (3,0),(3,4) asymptotes:y=2/3,y=4-2/3x
April 18, 2012

Pre-cal
thank you
April 18, 2012

Pre-cal
10.2 can someone show me this graph(x+2)^2/4+(y+2)^2/15=1
April 18, 2012

french-grammar
thank you maam for sending this questions
April 17, 2012

french-grammar
i am very glad and thanks for helping me
April 17, 2012

french-grammar
please help me by describing what do you really mean by pronom en and pronom relatifs and its uses
April 17, 2012

science-biology
thanks a lot
April 17, 2012

science-biology
thanks a lot.....
April 17, 2012

science-biology
I am in 10th grade and can you please help me by defining what is bio-catalysts?
April 17, 2012

maths
prove that any odd positive integer of 8q+1,where q is any integer?
April 17, 2012

interior decorating
the principle of color
April 8, 2012

math
solve the system of linear equations 2x+2y=1 3x-y=6 thanks
April 7, 2012

Biology
The main function of the stomach is digestion.other functions are 1)storing the food we eat. 2)breaking down of food into simpler substance into a liquidly mixture called chyme. 3)slowly empties that liquidly mixture into the small intestine ect...
March 26, 2012

math
How small tennis balls do I need to make it even on a weighing scale if all I need is only 5 kilo
March 18, 2012

chemistry
what volume (in liters)of 0.050 MNaOH can be prepared from 500.mL of 0.35 MNaOH?
March 16, 2012

business math
Manually calculate the compound interest on an investment of $8500 at 6% interest, compounded semiannually, for 18 mo.
March 9, 2012

chemistry
for each of the following equations,calculate the mass of each product formed if 25.0g of the reaction listed first reacts completely with the second.a. 2AgNO3+CaS04=Ag2S04+Ca(No3)2. b. 2AL+GHNO3=2AL(NO3)3+3H2.
March 8, 2012

algebra
factor monomial 64xcubic-27
March 5, 2012

physics
CBA
March 3, 2012

algebra
describe what the graph of interval {-4,10}
February 28, 2012

algebra
describe what the graph of interval {-4,19}
February 28, 2012

math
Explain how multiplication can help you find 7+7+7.
January 26, 2012

math
A hiker travels N 33 degrees W for 15km, then turns 90 degrees and walks 12km in the direction S 57 degrees W At that time how far is the hiker from his starting point? What is his bearing from his starting point?
January 10, 2012

chemistry
By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy 497 kJ mol-1 bond ...
December 22, 2011

chemistry
By reference to Molecular orbital Theory and giving the appropriate MO diagrams explain why the bond in N2 is very strong short (bond dissociation entalpy 945 kjmol-1,bond length 109.8 pm) while that in O2 is weaker and longer (bond dissociation entalpy 497 kJ mol bond length ...
December 21, 2011

Pre-Calc-Please check answer
Thank you-I see where I made the mistake Funny!! I like that!
December 15, 2011

Pre-Calc-Please check answer
Should be sigma sign not signma sign
December 15, 2011

Pre-Calc-Please check answer
1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...
December 15, 2011

Pre-Calc-Please check answer
1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...
December 15, 2011

Pre-Calc-Please check
1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9 = -1/5*1/2621444 = -1/1310702
December 15, 2011

chemistry
Suppose that the following solution is diluted by adding the indicated amount of water. Calculate the new concentration of 225 mL of 3.02 M HCl; 375 mL water added
December 4, 2011

math
Would you use mental math to solve 2984+1997+406? Explain?
November 22, 2011

Math
Explain how you can estimate to tell whether 433-147=286 is reasonable.
November 17, 2011

Math
Explain how you can estimate to tell whether 433-147=286 is reasonable.
November 17, 2011

math
Patricia estimated that 439 - 186 would be close to 300. Do you agree? Explain and solve the problem.
November 17, 2011

Math
thank you
November 14, 2011

Math
Heidi says 381= 2 hundreds, 7 tens, 11 ones. Do you agree? Explain.
November 14, 2011

Economics
If a firm temporarily suspends production due to matters of financial loss, is a shutdown of business, if a firm opts to “go out-of-business” primarily due to continual financial losses the business is inoperable and no longer conducting transactions. My firm ...
November 9, 2011

math
If you estimate to the nearest 5 or 10 it is easier to add.
November 7, 2011

Chemistry
What is the molecular weight of 30% aqueous nitric acid?
November 7, 2011

CHEMESTRY
Which of the following solutions would have the lowest boiling point? A.1.0 M NaCl B.2.0 M NaCl C.3.0 M NaCl D.4.0 M NaCl
November 3, 2011

psychology
The testing company has hired qualified people in the field to administer the new test bank to subjects of different ages and ethnic backgrounds.They need a sizeable number of scores from inner city,urban,and country/small town subjects.Their goal is to gather suffiecient data...
November 2, 2011

Math
Explain why one column in a hundredths grid is equal to one column in a tenths grid?
November 1, 2011

math
THANK YOU
October 27, 2011

math
hector music teacher requires 450 min of practice each month. Hector practiced 239 min the first three weeks this month. Estimate how many minutes he has left to practice.
October 27, 2011

IT
What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users? I need this for my college paper. Thanks
October 25, 2011

IT
What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users?
October 25, 2011

math
Is it reasonable to say the sum of 146 and 149 is less than 300? Explain.
October 24, 2011

physics
no, that's all he posted.
October 22, 2011

physics
A car is connected to a tree by a length of rope tied tightly. A 115 pound woman steps in the middle of the rope causing it to deflect by 15 degrees.
October 22, 2011

math
Jonah wants to add 43+19. He added 43+20. What step should he take next?
October 19, 2011

Math
Thank you
October 19, 2011

Math
Miles says 47+36 is the same as 50+33. Is this reasonable? Explain.
October 19, 2011

statistics
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how would you use these three levels in relationship to risk to patients in implementing the decisions of your research?
October 18, 2011

Math 3 grade
40+3
October 17, 2011

HRM/498
One paragraph identifying and describing the diversity consideration and the impact it is having on one or more aspects of a company's strategic HR planning process.
October 16, 2011

HRM/498
One paragraph identifying and describing the ethical consideration and the impact it is having on one or more aspects of a company's strategic HR planning process.
October 16, 2011

Math
9 days x 1/2 hour = 9/2 Now divide 9/2 = 4 1/2 Answer: 4 1/2 (improper fraction) 9/2 ( mixed fraction)
October 13, 2011

math stats
four times the difference of -19 and 3 amounts to -88
October 3, 2011

physics
a 10kg wood ball hangs from a 1.1 m long wire. The maximum tension the wire can withstand without breaking is 600N. a .9 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed the the projectile can have before the cable breaks
October 2, 2011

algebra
jopfjqopegfjq
October 1, 2011

Anatomy
I have a question: The process that traps solids in the cell membrane and brings them into the cell is which of the following:I'm almost positive it i pinocytosis, correct? pinocytoais phagocytosis ion pumps
September 28, 2011

Chemistry
Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation: Al2O3(s) + NaOH(l) + HF(g) -> Na3AlF6 + H2O(g) If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react ...
September 18, 2011

STATS
The top selling Red and Voss tire is rated 70,000 miles means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles and a standard deviation of 6,400. a. What is the probability that a tire ...
September 16, 2011

science
The making of the nuclear reactor was an advance in
September 16, 2011

Biochem
Desribe the preparation of 2.00 L of 0.100M pH 9.00 glycine starting with the sodium chloride salt of zwitterionic glycinhe and 1.00M NaOh. If a reaction that generated 2.00 mmoles of base were carried out in 100 mL of the above buffer, what would be the final solution pH? ( ...
September 13, 2011

algebra
Find the length of each kind of shark. The white Shark is 18ft long. The oceanic whitetip shark is 2/3 the length of the tiger shark.
September 11, 2011

Spanish
Thank you for answering
September 8, 2011

Spanish
So I didn't mean to put Te llamo Isabel as the usual way, I meant to say Me llamo Isable is the way I think we put it because that wouldn't involve reflexive in this case, I don't think.
September 8, 2011

Spanish
Hi we just relexive verbs and I'm already stuck Please check this answer ¿Cómo te llamas? 1. Me llamas Isabel 2.Te llamas Isabel 3.Te llamo Isabel 4.Me llamo Isabel Would it be "Me llamo Isabel?" because Te llamo Isabel is the usual way Also Te ...
September 8, 2011

Pre-Calculus
I can answer my own question-NO yours makes more sense. Its the first day of these so I'm still alittle confused. Thank you for helping
September 1, 2011

Pre-Calculus
I came up with (x+5)(x+6) = 0 x^2 - 11x + 30 = 0 Would that also be correct? Thank you for helping
September 1, 2011

Pre-Calculus
I need to write a polynomial of the smallest degree with roots 5 and 6 and the answer can't have parentheses. Can someone point me in the right direction. I have several of these to do.
September 1, 2011

physics
You are driving south on a highway. Then, without changing speed, you round a curve and drive west. Do you accelerate?
August 31, 2011

physics
You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change?
August 31, 2011

maths
the diameter of a wheel is 84cm? How far it travels in one turn?
August 30, 2011

ETH125
what changes has the US made to certain polices concerning the treatment of Muslims and Arabs?
August 25, 2011

geology
How do oceans regulate climate?
August 2, 2011

Math
Suppose the interest rate is 8% APR with monthly compounding. What is the present value o an annuity that pays $90 every 6 months for 5 years?
July 14, 2011

Med terms
I find nine(9)words, but I need ten (10) I do not know what I am missing. But I am missing a word and place my finger on it. Dob chronic obstructive pulmonary disease (COPD) aphonia sputum apnea days dyspnea paroxysm ventilator So what is I missing here?!
July 12, 2011

educational statics
how often does the university admit an exception student with a SAT score of x =700 or above Asample of 36 students (N)- 36 were randomly selected with mean (=11,and standard deviation (x=12. the sample mean score X=9.
July 10, 2011

educational statics
the average SAT score at a local university is (=60, and standard is (x=50. Assume that the university SAT score has a normal distribution convert a student score x=700 into z score
July 10, 2011

algebra 2
1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation? 2) Which terms in a general second-degree equation (Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0) are used to find the ...
July 10, 2011

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