(a) Interpretation: The element having the smaller molar mass needs to be determined. Concept introduction: The number of moles of an atom of element is related to mass and molar mass as follows: n = m M Here, m is mass of atom of element in grams and M is molar mass in grams/mol. In 1 mol of an element the number of atoms is 6.023 × 10 23 and mass of 1 mol of an element is molar mass thus, mass of 6.023 × 10 23 of element is molar mass.
(a) Interpretation: The element having the smaller molar mass needs to be determined. Concept introduction: The number of moles of an atom of element is related to mass and molar mass as follows: n = m M Here, m is mass of atom of element in grams and M is molar mass in grams/mol. In 1 mol of an element the number of atoms is 6.023 × 10 23 and mass of 1 mol of an element is molar mass thus, mass of 6.023 × 10 23 of element is molar mass.
Solution Summary: The author explains that the number of moles of an atom of element is related to mass and molar mass as follows:
The element having the smaller molar mass needs to be determined.
Concept introduction:
The number of moles of an atom of element is related to mass and molar mass as follows:
n=mM
Here, m is mass of atom of element in grams and M is molar mass in grams/mol.
In 1 mol of an element the number of atoms is 6.023×1023 and mass of 1 mol of an element is molar mass thus, mass of 6.023×1023 of element is molar mass.
Interpretation Introduction
(b)
Interpretation:
The element with more atoms per gram needs to be determined.
Concept introduction:
The number of moles of an atom of element is related to mass and molar mass as follows:
n=mM
Here, m is mass of atom of element in grams and M is molar mass in grams/mol.
In 1 mol of an element the number of atoms is 6.023×1023 and mass of 1 mol of an element is molar mass thus, mass of 6.023×1023 of element is molar mass.
Interpretation Introduction
(c)
Interpretation:
The element with more atoms/gram needs to be calculated.
Concept introduction:
The number of moles of an atom of element is related to mass and molar mass as follows:
n=mM
Here, m is mass of atom of element in grams and M is molar mass in grams/mol.
In 1 mol of an element the number of atoms is 6.023×1023 and mass of 1 mol of an element is molar mass thus, mass of 6.023×1023 of element is molar mass.
Interpretation Introduction
(d)
Interpretation:
The element with more atoms per mole needs to be determined.
Concept introduction:
The number of moles of an atom of element is related to mass and molar mass as follows:
n=mM
Here, m is mass of atom of element in grams and M is molar mass in grams/mol.
In 1 mol of an element the number of atoms is 6.023×1023 and mass of 1 mol of an element is molar mass thus, mass of 6.023×1023 of element is molar mass.
Rank the labeled protons (Ha-Hd) in order of increasing acidity, starting with the least acidic.
НОН НЬ
OHd
Онс
Can the target compound at right be efficiently synthesized in good yield from the unsubstituted benzene at left?
?
starting
material
target
If so, draw a synthesis below. If no synthesis using reagents ALEKS recognizes is possible, check the box under the drawing area.
Be sure you follow the standard ALEKS rules for submitting syntheses.
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Note for advanced students: you may assume that you are using a large excess of benzene as your starting material.
C
:0
T
Add/Remove step
G
The following equations represent the formation of compound MX. What is the AH for the
electron affinity of X (g)?
X₂ (g) → 2X (g)
M (s) → M (g)
M (g)
M (g) + e-
AH = 60 kJ/mol
AH = 22 kJ/mol
X (g) + e-X (g)
M* (g) +X (g) → MX (s)
AH = 118 kJ/mol
AH = ?
AH = -190 kJ/mol
AH = -100 kJ/mol
a)
-80 kJ
b)
-30 kJ
c)
-20 kJ
d)
20 kJ
e)
156 kJ