In the figure above, the solid line shows the expected result of steadily decreasing the volume, thus increasing the pressure of a sample of gaseous hydrogen fluoride at a constant temperature of 100 degrees celcius. The normal boiling point of HF (g) is 19.5 degrees celcius. The dashed line shows the actual result when the experiment was carried out. Which of the following BEST accounts for the observed behavior?

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.