iron(III) hydroxide---FeH3
ammonium bromide----NH4Br
copper(I) sulfate---Cu2SO4
tin(II) oxide-----Sn2O2
It makes it tougher to answer questions when you change screen names. Also it takes longer for you to get an answer.
You wrote iron(III) hydride. Iron(III) hydroxide is Fe(OH)3
Copper(I) sulfate is correct.
I would write SnO for tin(II) oxide. Unless we know the compound forms a dimer or a trimer, we write the empirical formula. For example, HO is the empirical formula for hydrogen peroxide but we know it forms a dimer; therefore, we write hydrogen peroxide as H2O2.Mercury(I) chloride long as been known to dimerize; therefore, we write Hg2Cl2 and not HgCl. NaCl and other salts actually are NaxClx but we write the empirical formula for it and other like it. Many texts use formula mass for NaCl instead of molar mass for that reason. I know this contains some extra information but it's free so be happy. :-).
Is ammonium bromide correct?
Yes, I'm sorry I missed that.
To determine the chemical formulas of the given compounds, you need to understand the charges of the atoms and how they combine to form compounds.
1. Iron(III) hydroxide - FeH3:
In this compound, the iron atom has a +3 charge (III) while the hydroxide ion (OH-) has a -1 charge. To form a neutral compound, the charges must balance out. Since the hydroxide ion has a -1 charge, the iron atom must have a +3 charge to balance it. Therefore, the chemical formula for iron(III) hydroxide is Fe(OH)3.
2. Ammonium bromide - NH4Br:
Ammonium is a polyatomic ion with the formula NH4+, which means it consists of one nitrogen atom and four hydrogen atoms. Bromide is a simple monatomic ion with the symbol Br-. To form a neutral compound, the charges must balance out. Since the ammonium ion has a +1 charge, the bromide ion must have a -1 charge to balance it. Therefore, the chemical formula for ammonium bromide is NH4Br.
3. Copper(I) sulfate - Cu2SO4:
In this compound, the copper atom has a +1 charge (I) while the sulfate ion (SO42-) has a -2 charge. To form a neutral compound, the charges must balance out. Since the sulfate ion has a -2 charge, two copper atoms with a +1 charge are required to balance it. Therefore, the chemical formula for copper(I) sulfate is Cu2SO4.
4. Tin(II) oxide - Sn2O2:
In this compound, the tin atom has a +2 charge (II) while the oxide ion (O2-) has a -2 charge. To form a neutral compound, the charges must balance out. Since the oxide ion has a -2 charge, two tin atoms with a +2 charge are required to balance it. Therefore, the chemical formula for tin(II) oxide is Sn2O2. However, it is common practice to simplify the formula by dividing the subscripts by their greatest common divisor (2) to give SnO.
Remember that determining chemical formulas involves understanding the charges of the atoms and how they combine to form compounds. The charges of the elements can be determined from the periodic table or by knowing common ionic charges for specific elements.