mema
Popular questions and responses by mema
chemistry
What is the mass number of an atom of potassium that has 20 neutrons?
asked on June 20, 2011 
chemistry
consider a neutral atom with 30 protons and 34 neutrons. What is the mass number for the atom?
asked on June 20, 2011 
chemistry
consider a neutral atom with 30 protons and 34 neutrons. What is the mass number for the atom?
asked on June 21, 2011 
chemistry
The carbon tetrachloride molecule,CCi4 is what kind of molecule and bond?
asked on June 20, 2011 
chemistry
what is the element with the electron arrangement 2 8 7
asked on June 20, 2011 
algebra
solve using the subsitution method 4x+4y=36 4x+4y=12 If the system has no solution or an infinite number of solutions, please help me understand it.
asked on June 9, 2011 
chemistry
In beta decay, why does the atomic number increase by 1?
asked on July 13, 2011 
chemistry
A 55yearold woman visits a popular eatery for lunch. She orders a cheese and bacon pizza with extra cheese and has about 3 large glasses of cola (ph value 3). On the way back home, she experiences heartburn and abdominal pain, and has difficulty
asked on June 25, 2011 
chemistry
What is the mass difference between sodium ion vs. sodium atom?
asked on June 20, 2011 
chemistry
Every measurement has a measurement uncertainty. Discuss how precise and accurate measurement can be achieved in spite of the inherent measurement uncertainty. You could use either of the two options given below. • Take a ruler and measure the height of
asked on June 15, 2011 
Chemistry
convert 39C fever to fahrenheit
asked on June 15, 2011 
math
n (level 0) = 1 n (level 1) = 4 n (level 2) = 13 n (level 3) = 27 what is the n level ? it means n of any level .. I need an equation, pls ?
asked on November 12, 2012 
Python  Tkinter
how can I make my program to freeze in certain conditions .. unless I click "r" it will continue to work ?
asked on October 27, 2012 
math
find complex zeros of the polynomial function. put f in factored form. f(x)=x^36x^2+21x26
asked on August 24, 2012 
chemistry
Serine exists in its zwitterion form at a pH of 5.7. Draw the structural formula for the same. Explain the manner in which the structural formula of polar and nonpolar amino acids would vary.
asked on July 28, 2011 
Chemistry
Serine exists in its zwitterion form at a pH of 5.7. Draw the structural formula for the same. Explain the manner in which the structural formula of polar and nonpolar amino acids would vary
asked on July 27, 2011 
Chemistry
A girl is celebrating her seventh birthday. Each guest is served one large slice of chocolate cake, a hamburger, French fries, and some oranges. Identify the food groups mentioned above. If one slice of chocolate cake contains 35g of carbohydrate, 15g of
asked on July 23, 2011 
Chemistry
What kind of molecule is NADH dehydrogenase? Where and how does it typically function?
asked on July 19, 2011 
Chemistry
The Managing Director of a wellknown company on Wall Street thrives on a diet of fruit jam, bread, pasta, and coffee. She exercises intermittently. One day she decides to go to her primary healthcare provider for a routine checkup. The healthcare provider
asked on July 17, 2011 
chemistry
Identify a haloalkane and describe the manner in which it functions as an anesthetic.
asked on July 16, 2011 
chemistry
State three examples each of acids, bases, and salts commonly used in therapeutic processes. From the examples you state, select one acid, one base, and one salt and describe how and where they are used in therapeutic processes. Please note that your
asked on June 25, 2011 
chemistry
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals? Why? In which situations are these chemical reactions useful to healthcare professionals?
asked on June 25, 2011 
chemistry
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate
asked on June 25, 2011 
chemistry
The body consist of elements, 65% oxygen is in the blood and 18% carbon. Anything in the body tends to be a compound. Is blood always 65 % oxygen and 18% carbon?
asked on June 21, 2011 
chemistry
Elements in group 2A(2) 0f the periodic table from ions with a change of, How would I find this out. 1+ 1 2+ 3+ 0
asked on June 19, 2011 
Chemistry
A freshman is currently enjoying the Arts Studio program she is pursuing at a wellknown university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely
asked on June 19, 2011 
Chemistry
A freshman is currently enjoying the Arts Studio program she is pursuing at a wellknown university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely
asked on June 16, 2011 
Chemistry
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?
asked on June 16, 2011 
chemistry
A robust first grader goes for swimming lessons three times a week, and he enjoys it thoroughly. During the first week of December, he develops an upper respiratory infection, starts coughing continuously, and has a high fever of 39°C. His condition
asked on June 15, 2011 
algebra
Multiply 5x+4 by 4x^2+x
asked on June 9, 2011 
algebra
Use polynominal long division to divide 4x^3+24x^224x+4 by x^25x+1
asked on June 9, 2011 
algebra
Joe has a collection of nickles and dimes that is worth $7.65.If the number of dimes was doubled and the number of nickles was increased by 35, the value of the coins would be $14.30. How many nickles and dimes does he have?
asked on June 9, 2011 
algebra
Given the quadratic function f(x)=9x^236x+36 find a value of x such that f(x)=9
asked on June 9, 2011 
algebra
Subtract (4x+17xy9y)(5x8xy)
asked on June 9, 2011 
algebra
express in terms of i 3/104
asked on June 9, 2011 
algebra
write with postive exponents. Assume that even roots are nonnegative quantities and the demoninators are non zero (2x/y^2)^4
asked on June 9, 2011 
algebra
Solve using the elinination method 2x+2y=20 2x2y=4
asked on June 9, 2011 
algebra
Use the discriminant to determine the following equations have that are two different rational solutions:two different irrational solutions or exactly one rational solution or two different imaginary solution. x^2=5x+6
asked on June 9, 2011 
algebra
If a stone is thossed from the top of a 230 meter building, the height of the ston as a function of time is given by h(t)=9.8t^210t+230 t is seconds and h in meters. How many seconds will the stone hit the ground?Round to the nearest hundredreths place
asked on June 9, 2011 
algebra
solving the equation (x+4)(x4)=9 Eric stated that the solution would be x+4=9>x=5 or (x4)=9=>x=13 However one of these solution fails to work when subsituted back to the original equation. Why?olve and explain the reasoning. Can someone please help me?
asked on June 9, 2011 
Algebra
Wk 6 Sec 12.7 #24 World population growth In 2008 the world population was 6.7 billion and the exponential growth rate was 1.14% per year. A.Find the exponential growth function B.Predict the world’s population in 2014 C.When will the world’s
asked on June 8, 2011 
algebra
express as an equivalant expression that is a single logarithmic and simplfy if poissible loga(2x+10)loga(x^225)
asked on June 3, 2011 
algebra
rewrite as an equivalent loganthmic e^2=0.1353
asked on June 3, 2011 
algebra
find the quotient 9a^2b^2/3ab
asked on June 1, 2011 
algebra
find the quotient y^4+3y1/y^23
asked on June 1, 2011 
algebra
the area of a rectangular swimming pool is given by 4x^2+9x+2ft^2.One side length of the pool by 4x+1feet. What is an algebraic expression for the other side lengeth of the pool and simplify and include correct units as a part oy your answer. please help
asked on June 1, 2011 
algebra
find the quotient 6x^35x^213x+13/2x+3
asked on June 1, 2011 
algebra
find the vertex and the axis of symmetry andf(x)=x^210x+21` graph the function
asked on May 26, 2011 
algebra
determine what type of number the solutions are and how many solutions exist 5x^2=48x
asked on May 26, 2011 
algebra
Replace each equation with constants to complete the square and form a true equation x^2+2x+=(x+)^2
asked on May 26, 2011 
algebra
find the product (1/7x^22/5)1/2x+1/2 Can someone show me how to find the product?
asked on May 26, 2011 
algebra
Add the following polynimal (1/10x^21/2x3/10)+(1/2x^2+1/4x1/5 Show me how to do this please?
asked on May 26, 2011 
algebra
Consider that the age x of a unicorn in human equivlant years can be given by the formula f(x)=0.097326x^31.3367^2+12.46+3.914. When a unicorn is 2.5 years old, what is its age in human equilvant years. 12years old
asked on May 26, 2011 
algebra
Bob barber shop estimates their gross revenue for the second quarter to be given by the polynimal 3x^3+6x^2+3x+3. The shop estimates their cost for the quarter to be given by 9x^26x+5. Find and simplify the polyminal that will represent their profit. Will
asked on May 26, 2011 
algebra
4x^36x^2+7what is the polynomial is it a trinomial can be evaluated at x=.1/3 coeffcient of 6 is it a quadratic
asked on May 26, 2011 
algebra
x^23x+6 7x0 find and simplisy
asked on May 23, 2011 
algebra
Find the product 7x(2x^2+x4)
asked on May 22, 2011 
algebra
Find the difference (x^2+8x7)(9x^25x7)
asked on May 22, 2011 
algebra
add tyhe following (8x^22x+4)+(x^29x+7)
asked on May 22, 2011 
algebra
add the following (8.1x^25.9x7.1)+9.8x^28.1x4.8)
asked on May 22, 2011 
algebra
list the coefficients of the given polynomial 2x^3+4x^2+8x5
asked on May 22, 2011 
algebra
add the following (8x^22x+4)+(x^29x+7)
asked on May 22, 2011 
algebra
state the degree of the given polynomial 3x^44x^2+7x1
asked on May 22, 2011

Chemistry
thanks
posted on June 17, 2011 
chemistry
thank you
posted on June 16, 2011