8. Which of the following is an example of a chemical element?
a. Salt
b. Water
c. Sugar
d. Sodium

An observation that requires measurement is called quantitative observable or qualitative

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

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