Au3+
The cation Mn2S3 contains a manganese ion (Mn) with a charge of +2. Therefore, the ion symbol for this cation is written as Mn^2+.
Lithium bromide (LiBr) is a compound, not a cation. The cation is Li+.
The symbol of the cation of FeCl2 is Fe2+. A cation is a positively charged ion and to find the formula of any compound you must balance the cations with the anions.
The chemical formula (not symbol) of potassium bicarbonate is KHCO3.
The symbol for the cation formed when a potassium atom loses one electron is K+, and is named the potassium ion.
The cation of chromium is Cr3+.
The cation Mn2S3 contains a manganese ion (Mn) with a charge of +2. Therefore, the ion symbol for this cation is written as Mn^2+.
Lithium bromide (LiBr) is a compound, not a cation. The cation is Li+.
The symbol of the cation of FeCl2 is Fe2+. A cation is a positively charged ion and to find the formula of any compound you must balance the cations with the anions.
The symbol of calcium is Ca.
The chemical formula (not symbol) of potassium bicarbonate is KHCO3.
The symbol for the cation formed when a potassium atom loses one electron is K+, and is named the potassium ion.
Gold and silver are elements. The symbol for gold is Au, and the symbol for silver is Ag.
The symbol for the cation in CuO is Cu^2+. This means that the copper atom has lost two electrons, resulting in a positive charge.
Gold(III) chloride has the chemical formula AuCl3.
Atoms are isoelectronic when they have the same electron configuration. Therefore, an anion isoelectronic to krypton is bromide. A cation isoelectronic to krypton is rubidium.
The molar mass of chlorine is 35.45 g/mol. From the equation, 3 moles of chlorine are needed to form 1 mole of AuCl3. Therefore, 100.0 grams of chlorine corresponds to 100.0 g / 35.45 g/mol = 2.82 moles of Cl2. This would allow the formation of 2.82 / 3 = 0.94 moles of AuCl3. Finally, the molar mass of AuCl3 is 303.33 g/mol, which means 0.94 moles of AuCl3 would be equivalent to 0.94 mol * 303.33 g/mol = 285.53 grams of AuCl3.