You begin with a 50 g chunk of ice. Calculate the amount of heat needed to change this ice into50 g of steam.

The phase of a sample of a molecular substance at STP is not determined by its (1) arrangement of molecules (2) intermolecular forces (3) number of molecules (4) molecular structure

He henry's law constant of oxygen in water at 25 °c is 773 atm mol-1kg h2o. calculate the molality of oxygen in water under a partial pressure of 0.20 at

Which of the following is the minimum energy required for a reaction to occur? A activation energy B orientation energy C ionization energy D collision energy

What does a salt bridge do

A 6.0 M HCl solution is available. What volume is needed to make 6.00 L of 1.00 M solution?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.