I think the right choice is C. Coal, as it's utilized in making a multitude of products across the globe. I trust this information is useful to you.:)
Response: Option A) The lattice energy rises as cations become smaller, as demonstrated by LiF and KF.
Clarification: It has been observed that the lattice energy is largely determined by two primary factors regarding ionic solids:
i) The ionic charges - An increase in the charge of the ions corresponds to an increase in lattice energy.
and
ii) The size or radius of the ions - As the ionic size grows, the lattice energy diminishes accordingly.
Therefore, in this context, the latter factor is evident. Thus, it can be concluded that as cation sizes decrease among ionic solids, the lattice energy increases.
The response to this inquiry involves energy release. The bonds holding molecule atoms act as energy reserves. One method of energy release occurs when these bonds are severed, allowing energy to disperse outward. This breaking leads to smaller molecules rather than the creation of a larger one.
Clarification:
To obtain the specific element, you should multiply the grams provided by the ratio of grams of that particular element within its complete compound.
Since the query did not indicate the amount of NO2 produced, we can consider its mass to be negligible, thus assigning 1 mole to Nitrogen.
The empirical formula is K₂CO₃.
This formula represents the most simplified whole-number ratio of atoms in a chemical compound.
The atom ratio aligns with the mole ratio, which means our task is to find the molar ratios for K:C:O.
I prefer to summarize these calculations in table form.
Element Moles Ratio¹ Integers²
K 0.104 2.00 2
C 0.052 1.00 1
O 0.156 3.00 3
¹ To obtain the molar ratio, each mole value is divided by the smallest mole count.
² Convert the ratio values to integers (2, 1, and 3).
The empirical formula is K₂CO₃.
