Wednesday
May 22, 2013

# Posts by kristin

Total # Posts: 156

Chemistry
write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water

chemistry dilutions
you have 47 mL of a 2 M stock solution that must be diluted to .5 M how much water should you add

calculus
The function f is continuous on the closed interval [0,6] and has values that are given in the table below. x |0|2|4|6 f(x)|4|K|8|12 The trapezoidal approximation for(the integral): 6 S f(x) dx 1 found with 3 subintervals of equal length is 52. What is the value of K? How do y...

Chem 100
at 1 atm how much energy is required to heat 67 grams of H2O(s) at -22 degrees C to H2O(g) at 159 degrees C

Math
50=n/2+26

Find a rule that gives the third number from the first two numbers. Fill in the blanks.....10, 4, 5, ? 15, 7,7, ? 19,9,?

Chemistry
I don't understand how you know what state designation things are in a chemical equation. For example this is given: 2 (NH4)3PO4 (__) + 3 Ba(NO3)2 ---> Ba3(PO4)2 (__) + 6 NH4NO3 (__) How do you just know what to put for their state or phase designation?

reimbursement methodologies
does anyone have answers to test 38181803 for penn foster

Physics
A coiled Hookean spring is stretched 10 cm when a 1.5kg mass is hung from it. Suppose a 4 kg mass hangs from the spring and is set into vibration with an amplitude of 12 cm. A. Find the force constant of the spring. B. Find the Maximum restoring force acting on the vibrating b...

algebra
-9 + 36 divided by 6 times 2 -(-6) - 5 +2 = ? I'm having trouble with the order of operations.

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