.1) A fictitious element X is composed of 20 percent of the isotope X-50, 15 percent of the isotope X-51, and 65 percent of the isotope X-52. Calculate the relative atomic mass of element X. * 2)Calculate the relative atomic mass of silicon if the three silicon isotopes have mass and relative abundances of 27.9769 (92.2297%), 28.9765 (4.6832%) and 29.9738 (3.0872%). *

Which is a characteristic of mixtures?

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

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