A,D,and E I hope this helps
<u>Answer:</u> The change in entropy for the system is 140.3 J/K
<u>Explanation:</u>
The chemical equation follows:
To calculate the entropy change for vaporization of methanol, we use the equation:
where,
= entropy change of the reaction
n = number of moles = 1.00 mole
= heat of vaporization = 35.21 kJ/mol = 35210 J/mol (Conversion factor: 1 kJ = 1000 J)
T = temperature of the system =
Putting values in above equation, we get:
Hence, the change in entropy for the system is 140.3 J/K
Answer:
Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu²O.
Explanation:
To find average atomic mass, multiply each isotope's atomic mass with its relative abundance and add it all up.
15.012*0.1423 + 16.988*0.3348 + 19.177*0.5229 = 17.851 (5 s.f.)
Answer:
see below
Explanation:
1. 1 mol Mg = 24.31 g = 6.02 *10^23 atoms
calculate the number of atomsin 80.45g Mg
Numberof atoms = 6.02*10^23 Mg atoms / 24.31 g * 80.45 g
= 1.99*10^24 atoms
2.1 mol C-12 = 12.01g = 6.02 * 10^23 atoms
calculate the mass using
= 12.01 g C / 6.02*10^23 atoms * 100 atoms
= 1.99 * 10^-21 g