Mafic magmas may contain up to about 75 percent SiO2 by weight. are viscous and do not flow easily. tend to inhibit passage of gas that tries to escape through it. result in less violent eruptions than felsic to intermediate magmas.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

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