1) Leia as frases a seguir, algumas vezes encontradas em estabelecimentos comerciais ou propagandas. Em seguida, aponte o equívoco dessas expressões. Perucas feitas de cabelo 100% natural, sem química. Piscina com água mineral corrente, sem química. Escova progressiva à base de queratina e proteínas do mel, sem químicos.

Listen base your answer to the question on the information below.propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below.c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol.what is the correct structural formula for a molecule of methanethiol

What does the symbol (–hfus) indicate in a phase change?

Light waves can move through , but they travel fastest when they move through a(n) .