Every time materials undergo physical or chemical changes..a. a new substance is always formed. b. the total amount of matter always increases. c. the total amount of matter always decreases. d. the total amount of matter always remains the same.

How are the terms group and period used on the periodic table

Which of the following is not true about the atomic model of substances?

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization. a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution. part bcalculate the percent ionization of ha in a 0.010 m solution