Wednesday
December 4, 2013

# Posts by trista

Total # Posts: 38

chemistry
is this true or false? i think its false because isnt it spontaneous if its positive When (triangle i think its called delta) H for a reaction is large and positive, the reaction is not expected to be spontaneous.

chemistry
is this right? A formation equation... it shows the change in enthalpy that comes from forming one mole of the compound in its standard state.

chemistry
k we did a lab and i dont understnad how to do this part... Determine the heat absorbed by the solution, which raises its temp.

chemistry
At 25 degrees celcius and 1.0 atm, 0.25 g of gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25 degrees celcius and 3.0 atm?

chemistry
The solubility of a gas is 0.34 g/L at STP. What is its solubility at a pressure of 0.80 atm and the same temperature?

Math
Given f(x) = x2 – 3x + 4, find f(0). If f(x) = x^2 – 3x + 4 then substitute 0 for x to get f(0).

Math
Given f(x) = –x3 + x2 – x – 5, find f(–3), f(0), and f(1) Hmmmm. Put in the value of x, and compute. Here is f(0) as an example: f(0)=-0^3 + 0^2 -0 -5 = -5

Geometry
1 How many faces does a square pyramid have? 2 How many edges does a square pyramid have? 3 How many vertices does a square pyramid have? answer? 8, 5, 10 Viualize one of the great pyramids of Egypt. It's base is a square and it has four sides. So the total number of faces...

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