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Joanie
Questions and answers by visitors named
Joanie
Questions (18)
Calculate the lattice energy of potassium oxide from the following data:
Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond
5 answers
13,528 views
Solve 4sin^2x + 4(squareroot of 2)cosx -6 for all real values of x.
3 answers
779 views
I have two problemson polygonal convex sets which I do not understand.
The first: Find the minimum value of f(x,y) = 2x-y+2 for
2 answers
634 views
Given vectors u=7i + 3j and v = -4i + 3j, find 5u-4v in terms of unit vectors.
I am just beginning the study of vectors and have
5 answers
4,586 views
I am having a lot of problems with this linear programming problem. CAn someone help?
A farmer buys two varieties of animal feed.
3 answers
1,078 views
Use a metric ruler and a protractor to find 2 a (vector) - 2 b (vector). Then find the magnitude and amplitude of the resultant.
1 answer
378 views
I have to graph the following:
2 = rcos(theta-20 degrees). I put it in the form r = 2/cos(theta-20degrees). Is this correct? I am
3 answers
589 views
I have to write the equation of a hyperbola whose center is (0,0) and which has a vertical transverse axis.
The equations of the
2 answers
558 views
Problem: Identify the conic from the equation 13x^2-6(sq.rt.6)xy+7y^2-16=0
I have to choose from the following four answers:
3 answers
1,201 views
I have to solve the following inequalities:
x^2 + y^2 is less than or equal to 49 y is less than or equal to 3-x^2 I know that
4 answers
543 views
Write the equation of the conic section x^2+6^2=16 after a rotation of 45 degrees about the origin.
I don't know where to begin
1 answer
428 views
I am having trouble balancing this equation:
C6 H12 06 + O2 = C7 H8 + O2 Can you please help? Thanks
3 answers
386 views
I am having trouble balancing this equation:
C6 H12 06 + O2 = C7 H8 + O2 Can you please help? Thanks
3 answers
374 views
a gaseous mixture contains 1 mol of O2 and 2 mol of CO2, exerting a total pressure of 1.5 atm. what amount of CH4 must be added
2 answers
678 views
a gas bulb is connected to an open end manometer. the pressure in the bulb is .355 torr MORE than atmospheric pressure. If the
3 answers
1,020 views
Calculate the lattice energy of potassium oxide from the following data:
Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond
1 answer
1,189 views
In-place fossil fuel resource statistics can be misleading because
3 answers
322 views
The distance between town M and N is 58.6 km. town Q which is between two town is 39.78 km from M . How far is Q from M
1 answer
46 views
Answers (10)
Weak inductive argument
Because she had practiced her presentation so diligently, Jamie
Ok so i also was going to ask this question but I THINK i figured it out. remember that mols and pressure are proportional. if 1 mol of O2 gives 2 atm of pressure, then how many mols of a gas gives 1 atm of pressure? (because the total is three, so we just
Thanks, I thought so. I will contact my teacher, maybe I copied it down wrong in class. Thanks for your input. Joanie
Hi-- The word "are" in the sentence should be "our." Also, We should be capitalized and there should be a period after backyard.
Thank you for helping.
Hi drwls-- I have just begun the study of vectors. I am given the answer in multiple choice--The answer you gave me is 7.571. The choices I have are 8cm;41 degrees; 9cm;38degrees;6cm,36degrees, and 4cm,31 degrees. Your answer is closest to 8 cm. Is that
Dear Reiny, Thank you for helping me. Could you check an answer for me? Use a metric ruler and a protractor to find 2 a (vector) - 2 b (vector). Then find the magnitude and amplitude of the resultant. Vector a is 4 cm and the angle is 60 degrees. Vector b
Hi-- "Eight hellish months" would keep the meaning of what you are trying to say. You are putting "hell" in the form of an adjective. Hope this helps.
Thank you for helping me with this problem. Joanie
