PLS help with this!!?? A cracking reaction produces pentane (C5H12) and ethene (C2H4). Predict the formula of the starting material.

Compared with the freezing-point depression of a 0.01 m c6h12o6 solution, the freezing-point depression of a 0.01 m nacl solution is

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?