Why is a pencil used to mark the chromatogram instead of pen?

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

The table below shows the freezing points of four substances. substance freezing point (°c) benzene 5.5 water 0 butane –138 nitrogen –210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0°c? benzene water butane nitrogen

Sulfonic acids react like carboxylic acids when treated with thionyl chloride. draw the product of the reaction of para-toluene sulfonic acid with thionyl chloride. the name of the product will give you a hint.