# Recent content by Flip

1. ### Chemistry- two point Arrhenius Equation (miscalculation?)

Chemistry- two point Arrhenius Equation (miscalculation??) Homework Statement At 25 degrees celsius, the first-order rate constant for a reaction is 2.0 x 10^3 s^-1. The activation energy is 15.0 kJ/mol. what is the value of the rate constant at 75 degrees celsius. T1= 298.15 K T2=...
2. ### Chemistry, colligative properties-freezing point

The Van't Hoff Factor isn't given, which is why I thought that I had to find it myself. But if it does dissociate completely then doesn't that mean that the Van't Hoff Factor would just be 1?
3. ### Chemistry, colligative properties-freezing point

Homework Statement A solution is made by dissolving 250.0 g of solid potassium chromate in 1.00 kg of water. What will be the freezing point of the new solution? molal freezing point-depression constant of water = 1.86 degrees Celsius/molality molality = mol/kg Relevant equations...
4. ### Chemistry, mL required to Concentration of HNO3

Ok ok, so since it says 50 percent by mass HNO3 I assumed that it was part of a 100 percent solution. Meaning 100 grams. So I did the whole process again with the new calculations and got 63.0 mL. Here is my work: (50 g solution)(1 mL/2.00 g)(0.001 L/1 mL) = 0.05 L (50 g HNO3)(1 mol...
5. ### Chemistry, mL required to Concentration of HNO3

Thanks for the reply. Ok so the volume I obtained is right, but the label is wrong? And the answer is around 31.6 mL?
6. ### Chemistry, mL required to Concentration of HNO3

Homework Statement How many mL of 50.0% by mass HNO3 solution, with a density of 2.00 g/mL is required to make a 500 mL of a 2.00 M HNO3? Homework Equations initial Molarity X initial Volume = final Molarity X final Volume The Attempt at a Solution (50 g HNO3)(1 mL/2.00 g)(0.001 L/1 mL)...
7. ### Chemistry Chemistry-Physical Changes and Intermolecular Forces

Oxygen is more electronegative.
8. ### Chemistry Chemistry-Physical Changes and Intermolecular Forces

Hi everyone. I have recently just started studying chemistry for my Junior year in High School. So you could say that I am a newbie at this. :smile: I have small knowledge on the relationship between Intermolecular Forces and Physical changes. (Example: Boiling Point.) So if the IMF of a...