Answer:
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Explanation:
Answer:
Approximately
grams.
Explanation:
Let
represent the number of grams of aluminum iodide required to yield that 73.75 grams of aluminum.
In most cases, the charge on each aluminum ion would be +3 while the charge on each iodide ion would be -1. For the charges to balance, there needs to be three iodide ions for every aluminum ion. Hence, the empirical formula for aluminum iodide would be
.
How many moles of formula units in that
grams of
? Start by calculating its formula mass
. Look up the relative atomic mass of aluminum and iodine on a modern periodic table:
.
.
Since there's one aluminum ion in every formula unit,
.
How many grams of aluminum would that be?
.
However, since according to the question, the percentage yield (of aluminum) is only
. Hence, the actual yield of aluminum would be:
.
Given that the actual yield is 73.75 grams,
.
.
- more individuals fighting over the same resources
- the loss of the environment in which an organism's needs are met
- the introduction of new predators into an area
Explanation:
Extinction is the complete elimination or termination of a species from the environment. Many factors can result in the extinction of a species. One of them is a sudden catastrophic event like the meteor strike that eliminated the dinosaurs. Other factors include habitat loss, a higher death rate than birth rate in the population, and etcetera. There have been several extinction events in earth’s history; the Ordovician Mass Extinction, Devonian Mass Extinction, Permian Mass Extinction, Triassic-Jurassic Mass Extinction, and Cretaceous-Tertiary (or the K-T) Mass Extinctions.
6 molls
As a result, if two moles of dinitrogen gas are specified, six moles of dihydrogen gas are needed.
Ionic compound is a chemical compound composed of ionsheld together by electrostatic forces termed ionic bonding. The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions. These can be simple ions such as the sodium (Na+) and chloride (Cl−) in sodium chloride, or polyatomic species such as the ammonium (NH+
4) and carbonate (CO2−
3) ions in ammonium carbonate. Individual ions within an ionic compound usually have multiple nearest neighbours, so are not considered to be part of molecules, but instead part of a continuous three-dimensional network, usually in a crystalline structure.
Ionic compounds containing hydrogen ions (H+) are classified as acids, and those containing basic ions hydroxide (OH−) or oxide (O2−) are classified as bases. Ionic compounds without these ions are also known as salts and can be formed by acid–base reactions. Ionic compounds can also be produced from their constituent ions by evaporation of their solvent, precipitation, freezing, a solid-state reaction, or the electron transfer reaction of reactivemetals with reactive non-metals, such as halogen gases.
Ionic compounds typically have high melting and boiling points, and are hardand brittle. As solids they are almost always electrically insulating, but when melted or dissolved they become highly conductive, because the ions are mobilized.
This is answer
high melting point
malleable