42 - A água é uma substância vital para a sobrevivência humana. Médicos recomendam o consumo diário de cerca de dois litros de água, já que o corpo perde, aproximadamente, essa
quantidade por meio da respiração, urina e suor. Considerando o consumo diário de 1,8 L de água
por uma pessoa, a quantidade ingerida por ela será de:
A) 18g de moléculas.
B) 180g de moléculas.
C) 0,1 mol de moléculas.
D) 10 mols de átomos.
E) 100 VeST RQ VeSé\YS

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

What two categories of toxins were present in the air at dish,texas as a result of the gas pipelines that pass through the area