The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?

6.0 * 10-5

3.5 * 10-4

1.1 * 10-9

2.0 * 10-9

none of the above

The ionization energies in kcal for mg and ca are mg ca 1st 176 141 2nd 346 247 3rd 1847 a) indicate the reasons for the relatively high 3rd ionization energy for magnesium.

Which of the following types of energy would exist in a liquid sample, but not in a gas sample of the same molecular compound? A. Kinetic energy from vibration B. Potential energy from inter-molecular forces C. Kinetic energy from translation D.

This is when water freezes, expands, pushing the rock apart slowly over a period of time.

Use you're words to define matter

Which particle has the most energy? A) ice Eliminate B) water C) steam D) there is no difference in particle energy

What is the polyatamic ion of thiosulfate

What two spheres are being pulled by the fires of gravity

What happens to the total mass of a substance undergoing a physical change

32 g of sulfur will react with 48 g of oxygen to produce 80 g of sulfur trioxide. if 20 g of sulfur and 100 g of oxygen are placed into a sealed container and allowed to react, what is the mass of sulfur trioxide in the container after the reaction

Water exhibits high levels of cohesion due to the polarity of the molecule (positively and negatively charged sides). given this information, which type of bond is responsible for water's cohesion and which atoms interact to form this bond?