Is color change a physical or chemical change?

How do you know how many an atom contains and how many electrons the entire ion has either lost or gained?

A solution is made by dissolvinh 26.42g of (NH4) 2so4 in enough h2o to make 50.00ml of solution what is the molarity of this solution?

How many termination code words are there?

35000 kJ / 0.250 s kJ is kilojoules

What will the concentration of PCl5 be when equilibrium is reestablished after addition of 1.31 g Cl2? PCl5 (g) ⇆ PCl3 (g) + Cl2 (g) Original Equilibrium Mixture: 3.42 g PCl5 4.86 g PCl3 3.59 g Cl2 in a 1.00-L flask.

Consider the statement, In the following process, the number of particles increases, so ΔS for this process must be positive. MgS (s) ⇄ Mg2 + (aq) + S2 - (aq) Is this statement true?

How do you read a data table?

In the manufacturing process of sulfuric acid, sulfur dioxide is reacted with oxygen to produce sulfur trioxide.

What is the pH of a solution with hydrogen ion concentration of 1 x 10^-6 M?

What fraction can be used in conversion of 32 m3 to mm3