Water rises in a capillary tube but mercury falls in the same tube. Why.

What are the similarities of physical and chemical change ?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?