Convert 55.0g Ca(OH)2 to moles.
The calculation shows that 55.0g of Ca(OH)2 corresponds to 0.742 moles.
To find the volume, divide 0.742 mol of Ca(OH)2 by its molarity of 0.680M, yielding approximately 1.09L of Ca(OH)2.
If you disregard the negligible volume of the Ca(OH)2 itself, the resulting total volume of a 0.680M solution created by dissolving 55.0g of Ca(OH)2 in an appropriate amount of water would be 1.09L.
Response:
D. Maximum internal cooking temperature
Clarification:
Per the Storage Ladder Protocol, proper rules must be followed when storing food in the refrigerator. Prepared dishes belong on the highest shelf; fruits and vegetables are positioned on the next; fish and seafood go on the third; beef and pork are kept on the fourth; ground meat is stored on the fifth; and poultry items sit on the bottom shelf. This illustrates that ground beef should be placed above chicken. A diagram is included below for optimal storage order explanation.
The correct answer is option (D): CO₂, BCl₃, and Fe³⁺.
Lewis theory defines an acid as a substance that can accept electron pairs, while a base donates electron pairs.
a. It’s a Lewis acid as it accepts electron pairs.
b. It isn't a Lewis acid since it does not accept electron pairs, but serves as a base by donating and accepting hydrogen ions.
c. This qualifies as a Lewis acid as it accepts electron pairs due to having an incomplete octet and empty 2p orbitals.
d. This is categorized as a Lewis acid as it accepts electron pairs.
Therefore, the ions recognized as Lewis acids include CO₂, BCl₃, and Fe³⁺.
To determine the number of moles of gas within the container, we use the ideal gas law formula
PV = nRT
where;
P - pressure: 2.87 atm x 101 325 Pa/atm = 290 802.75 Pa
V - volume: 5.29 x 10⁻³ m³
n - number of moles
R - universal gas constant: 8.314 Jmol⁻¹K⁻¹
T - temperature: 230 K
By substituting in the values
290 802.75 Pa x 5.29 x 10⁻³ m³ = n x 8.314 Jmol⁻¹K⁻¹ x 230 K
This solves to n = 0.804 mol
To find the molar mass, use the equation: mass present / number of moles
Molar mass = 56.75 g / 0.804 mol
Hence, the molar mass is 70.6 g/mol.
