What is a polyatomic ion? Also, how do I identify that sulphate is a polyatomic ion?

When chromium chloride crcl2 is dissolved in water the temperature of the water decreases answers?

For a particle to escape the liquid phase, which of the following must occur? Its kinetic energy must be equal to the average kinetic energy to the liquid particles. It must be moving toward the interior of the liquid.

Describe how adding and removing solute affects the concentration of a solution. Describe how adding and removing solvent affects the concentration of a solution. How does water dissolve salt easily, but not sugar?

Calculate the number of moles of NaCl contained in 0.500L of a 1.5M solution

Which compounds has the lowest vapor pressure at 50 c

How is measuring the volume of liquids different than measuring the volume of regular-shaped solids?

Which of the following best describes the motion of the particles in a piece of steel?

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?