Answer:
Explanation:
a) Iron has the tendency to undergo rusting -- this is a chemical property as it involves a reaction with water and air.
b) Precipitation in industrialized areas often has an acidic nature -- this is also a chemical property due to its interaction with bases or metals.
c) Hemoglobin is red in color -- this is a physical property since it doesn't entail any chemical reactions.
d) When water is left out in sunlight, it evaporates gradually -- this is a physical property because the process can easily be reversed, classifying it as a physical change.
e) During photosynthesis, plants convert carbon dioxide into more complex molecules -- this demonstrates a chemical property since it involves chemical reactions.
To determine the quantity of moles of gas in the sample of chlorine gas, we utilize the ideal gas equation
which is PV=nRT
n=number of moles
R= gas constant (62.36367 l.torr/k.mol)
P=pressure
V=volume
From the ideal gas equation, we can derive n= PV/RT
n= (328 x5.0)/ (62.36367 x310)= 0.085 moles
Response:
a. The return of the process fluid after it has been cooled, condensed, or heated in a distillation column or packing.
b. should remain stable at elevated temperatures
should not generate additional by-products
should be chemically inert
c. expressed as a range
d. determined by conducting a series of measurements
e. impurities cause substances to melt at lower temperatures.
Explanation:
a. In a reflux system, the condensate is returned to the initial flask or boiler. This keeps the process fluid at a constant temperature without needing more fuel while increasing the molar fraction of the distillate (which enhances product purity).
b. A solvent needs to be stable and should not participate in side reactions that produce unwanted by-products, ideally remaining inert at elevated temperatures.
c. It is advisable to report melting points as a range since various factors influence the melting point in experimental setups.
d. Melting points can be ascertained through a series of graphical measurements.
e. Impurities reduce the melting point of substances.
Explanation:
Nuclear forces arise from the close proximity of particles within the nucleus; the tritium atom comprises one proton, two neutrons, and one electron. How many isotopes of hydrogen are documented? Three. The hydrogen isotope with the least mass is designated as protium.
Cr2(SO4)3 + 6RbOH --> 2Cr(OH)3 + 3Rb2SO4
1 + 6 + 2 + 3 equals 12 (b)
