Problem when you go camping and have a fire to roast marshmallows, what happen to the wood at the end of the night? it burns and we call this a chemical change. however the next morning there's less material in the fire pit than the night before . what happen to all the wood???

the problem that I have is that in a chemical reaction, is the mass of the product equal to the mass of the reactants ?? what do you think??

hypothesis :

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

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