Solutions of hydrogen in palladium may be formed by exposing Pd metal to H 2 gas. The concentration of hydrogen in the palladium depends on the pressure of H 2 gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 g of palladium metal (solution density = 10.8 g cm 3 ). (a) Determine the molarity of this solution. (b) Determine the molality of this solution. (c) Determine the percent by mass of hydrogen atoms in this solution.
Solutions of hydrogen in palladium may be formed by exposing Pd metal to H 2 gas. The concentration of hydrogen in the palladium depends on the pressure of H 2 gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 g of palladium metal (solution density = 10.8 g cm 3 ). (a) Determine the molarity of this solution. (b) Determine the molality of this solution. (c) Determine the percent by mass of hydrogen atoms in this solution.
Solutions of hydrogen in palladium may be formed by exposing Pd metal to H2 gas. The concentration of hydrogen in the palladium depends on the pressure of H2 gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 g of palladium metal (solution density = 10.8 g cm3).
(a) Determine the molarity of this solution.
(b) Determine the molality of this solution.
(c) Determine the percent by mass of hydrogen atoms in this solution.
Which of the following molecules are NOT typical carbohydrates? For the molecules that are
carbohydrates, label them as an aldose or ketose.
HO
Он
ОН ОН
Он
ОН
но
ΤΗ
HO
ОН
HO
eve
Он он
ОН
ОН
ОН
If polyethylene has an average molecular weight of 25,000 g/mol, how many repeat units
are present?
Draw the a-anomer cyclized pyranose Haworth projection of the below hexose. Circle the
anomeric carbons. Number the carbons on the Fischer and Haworth projections. Assign R
and S for each chiral center.
HO
CHO
-H
HO
-H
H-
-OH
H
-OH
CH₂OH
Draw the ẞ-anomer cyclized furanose Haworth projection for the below hexose. Circle the
anomeric carbons. Number the carbons on the Fischer and Haworth projections.
HO
CHO
-H
H
-OH
HO
-H
H
-OH
CH₂OH
Name the below disaccharide. Circle any hemiacetals. Identify the numbering of glycosidic
linkage, and identify it as a or ẞ.
OH
HO
HO
OH
HO
HO
HO
OH
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