You mix baking soda powder with citric acid in a test tube. Nothing happens. Then you add some water to the mix. Suddenly, the test tube
feels cold. The cold test tube is a change in

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

Which is the most accurate name for the covalent compound p2o3?