A technique once used by geologists to measure the density of a mineral is to mix twodense liquids in such proportions that the mineral grains just float. When a sample of the mixture in which the mineral calcite just floats is put in a special density bottle, the weight is 15.4448 g. When empty, the bottle weighs 12.4631 g, and when filled with water, it weighs 13.5441 g. What is the densityof the calcite sample? (All measurements were carried out at 25 °C, and the density of water at 25 °C is 0.9970 g/mL. ) At the left, grans of the mineral calcite float the surface of the liquidbromoform ( d = 2.890 g / m L ) . At the right, the grains sink to thebottom of chloroform ( d = 1.444 g / m L ) . By mixing bromoform and chloroform in just the proportions required so that the grains barely float, the density of the calcite be determined (Exercise 62).
A technique once used by geologists to measure the density of a mineral is to mix twodense liquids in such proportions that the mineral grains just float. When a sample of the mixture in which the mineral calcite just floats is put in a special density bottle, the weight is 15.4448 g. When empty, the bottle weighs 12.4631 g, and when filled with water, it weighs 13.5441 g. What is the densityof the calcite sample? (All measurements were carried out at 25 °C, and the density of water at 25 °C is 0.9970 g/mL. ) At the left, grans of the mineral calcite float the surface of the liquidbromoform ( d = 2.890 g / m L ) . At the right, the grains sink to thebottom of chloroform ( d = 1.444 g / m L ) . By mixing bromoform and chloroform in just the proportions required so that the grains barely float, the density of the calcite be determined (Exercise 62).
A technique once used by geologists to measure the density of a mineral is to mix twodense liquids in such proportions that the mineral grains just float. When a sample of the mixture in which the mineral calcite just floats is put in a special density bottle, the weight is 15.4448 g. When empty, the bottle weighs 12.4631 g, and when filled with water, it weighs 13.5441 g. What is the densityof the calcite sample? (All measurements were carried out at 25 °C, and the density of water at 25 °C is 0.9970 g/mL. )
At the left, grans of the mineral calcite float the surface of the liquidbromoform
(
d
=
2.890
g
/
m
L
)
. At the right, the grains sink to thebottom of chloroform
(
d
=
1.444
g
/
m
L
)
. By mixing bromoform and chloroform in just the proportions required so that the grains barely float, the density of the calcite be determined (Exercise 62).
A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid?
2. The picture in the introduction shows that the mass of a crucible and lid was
determined to be 22.1504 g. The hydrate was placed into the crucible, and now
the crucible with lid and hydrate weighed 24.2901 g. The hydrate in the crucible
was then heated and all water was removed. Once cooled, the crucible with lid
and dried hydrate weighed 23.0063 g.
a) Calculate the mass of the hydrate.
b) Calculated the mass of water lost.
c) Calculate the mass percentage of water in the hydrate.
percent (%)
composition =
of water
mass of water lost
х 100
mass of entire hydrate
Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant materials to be 35g. The reaction resulted in the production of salt and water. He reported that his products weighed 32g.
Which best describes the results of Franklin’s experiment?
No error occurred, some of the products are always lost as heat.
An error occurred, the mass of the reactants should equal the mass of the products.
An error occurred, the products should weigh more than the reactants.
No error occurred, water is not weighed when determining the weight of the products.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3; Author: Crash Course;https://www.youtube.com/watch?v=QiiyvzZBKT8;License: Standard YouTube License, CC-BY