Why are the following procedures invalid? (a) to minimize the time required for an analysis, the temperature of a gc 13.1 instrument is increased above the boiling points of the components in the mixture (b) to increase the retention times and thus maximize the separation betweern peaks, the gas flow is adjusted to a very low value

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.