Photodecomposition is any photochemical reaction that results in the decomposition of a substance. Therefore, if silver chloride undergoes extensive photodecomposition, weighing it will produce low results.

Simply reduce the amount of light in the lab.

In Latin, the ablative absolute is usually found at the beginning of a sentence. It consists of a noun and a participle in the ablative case.

The ablative of accompaniment requires the appropriate case endings on the affected noun, and the preposition 'cum', which means 'with'. But the ablatives of instrument and of means require only the appropriate case endings on the affected noun. Neither one needs any preposition.

An ablative absolute refers to a construction in Latin that consists of a noun and participle or adjective in the ablative case, which is syntactically independent of the rest of the sentence. One can go to the library or search the internet to find an ablative absolute.