What is the name of the compound with the formula FeBr2? Iron(II) bromide What is the name of the compound with the formula P4010? Phosphorus pentoxide Q What is the formula for sulfur hexafluoride? SF6 What is the formula for calcium carbonate ? CaCO3
The Correct Answer and Explanation is :
Here are the correct answers:
- The name of the compound with the formula FeBr₂: Iron(II) bromide
- The name of the compound with the formula P₄O₁₀: Tetraphosphorus decoxide
- The formula for sulfur hexafluoride: SF₆
- The formula for calcium carbonate: CaCO₃
Explanation (300 words):
Chemical nomenclature and formula writing follow systematic rules established by the International Union of Pure and Applied Chemistry (IUPAC). Let’s break down the reasoning behind each answer:
- Iron(II) bromide (FeBr₂):
Iron is a transition metal and can exhibit multiple oxidation states. The “(II)” in Iron(II) bromide indicates that iron has a +2 oxidation state. Bromine is a halogen, forming a -1 charge as the bromide ion (Br⁻). To balance the charges, two bromide ions pair with one Fe²⁺ ion, resulting in the formula FeBr₂. - Tetraphosphorus decoxide (P₄O₁₀):
The name reflects molecular compounds’ naming conventions. “Tetra-” indicates four phosphorus atoms, and “deca-” signifies ten oxygen atoms. Although the empirical formula is P₂O₅, the molecular formula is P₄O₁₀, reflecting the actual structure of the compound. - Sulfur hexafluoride (SF₆):
This is a molecular compound. “Hexa-” means six, and “fluoride” indicates the presence of six fluorine atoms bonded to one sulfur atom. The formula SF₆ reflects sulfur’s valence of six. - Calcium carbonate (CaCO₃):
Calcium carbonate is an ionic compound. Calcium (Ca²⁺) is an alkaline earth metal with a +2 charge, while the carbonate ion (CO₃²⁻) carries a -2 charge. Their charges balance perfectly in a 1:1 ratio, forming the formula CaCO₃.
Understanding these rules ensures accurate naming and formula writing for compounds, crucial for communication in chemistry.