A solution in which 50 grams of solute is dissolved in 250 grams of solution has a concentration of what percent?

Given the electronegativities below, which covalent single bond is most polar? element: h c n o electronegativity: 2.1 2.5 3.0 3.5

A certain amount of H2S was added to a 2.0 L flask and allowed to come to equilibrium. At equilibrium, 0.072 mol of H2 was found. How many moles of H2S were originally added to the flask?

The movement of Earth's tectonic plates is related to

What does the atomic number of an element specify? what does the atomic number of an element specify?

The concentration of H3O+ andOH - in pure water are each 1 x 10-7mol/dm3. What is the ion product constant forwater?

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.

Which of the following measures the radiation given off by atoms per second?

What is the name of the outermost layer that forms a boundary around the outside of each cell

What does an ionic compound form?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?