Which of the following is the best definition of a hypothesis? a. it is a scientific question that guides the direction of an experiment. b. it is a prediction about the formation of a scientific theory. c. it is a testable, possible answer to a scientific question. d. it is a way of answering a scientific question using the scientific method.

How manyatoms of mercury are in 1.4214e+1 ml sample

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.