the student then emptied the flask and dried it once again. to the empty flask she added pieces of a metal until the flask was about three-fourths full. she weighed the stoppered flask and its metal contents and found that the mass was 144.076 g. she then filled the flask with water, stoppered it, and obtained a total mass of 162.292 g for the flask, stopper, metal, and water. find the density of the metal. a. to find the density of the metal we need to know its mass and volume. we can easily obtain its mass by the method of differences: mass of metal = g − g =

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?