0
Parentheses are used when you have more than 1 of a certain polyatomic ion.
For example, the chemical compound Magnesium nitrate.
It's chemical formula is Mg(NO3)2
A Nitrate ion (NO3) has a -1 charge and Magnesium(Mg) has a +2 charge. So when they form a chemical compound together, you drop the charges down to the other ion (nitrate is minus 1 so you need 1 magnesium. Magnesium is +2, so you need 2 nitrates), so there must be two nitrate ions to make Magnesium Nitrate.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoI have reduced the answer to 4 possible answers.
They are used to show atoms that are not part of the molecule.
They are used to show which atoms are positively charged.
They are used to show which atoms are most easily removed.
They are used to show how atoms are grouped in the molecule.
If i learn more, i will post it up! Hope this helps. Its better than "turtle"
Wiki User
∙ 12y agoParenthesis are used when using more than one polyatomic ion
Wiki User
∙ 11y agoTo show that more than one group of atoms (usually called a polyatomic ion) is present in one formula unit or molecule.
Wiki User
∙ 14y agoStructural Information
Wiki User
∙ 12y agoIf more than one polyatomic ion is needed
Wiki User
∙ 12y agofrancium
Add your answer:
Earn +20 pts
How should more than one polyatomic ion be indicated in a chemical formula?
One reason is that the composition of a polyatomic ion is fixed, just as that of a compound is fixed. If more than one polyatomic ion is present in an ionic compound, the use of parentheses allows a subscript to be used after the right parenthesis to designate the number of ions just as such subscript is used to designate the number of atoms in a compound.
An organic compound A is widely used as a preservative in pickles and has a molecular formula C2H2O2 This compound reacts with ethanol to form a sweet smelling compound B?
An organic compound A is widely used as a preservative in pickles and has a molecular formula C2H2O2 This compound reacts with ethanol to form a sweet smelling compound B known as acetic acid.
What is oxybenzone?
The chemical formula for Oxybenzone is C14H12O3.
Is NI3 a formula unit?
A formula unit is the chemical formula for a compound that can be used in balancing a stoichiometric equation. As this is the lowest possible combination of atomic combination, it is a formula unit.
What is the compound name for the compound with the formula NaF?
The chemical name for NaF is sodium fluoride. It is an ionic compound made up of the elements sodium and fluorine. Sodium fluoride is widely used in toothpastes.
When must parentheses be used in a formula?
In mathematics parenthesis must be used when the procedures do not follow the normal order of operations.
When is it appropriate to use parentheses in the naming of an ionic compound?
When the compound contains an ion with more than one atom in each ion, and the number of such units in a formula unit of the ionic compound is at least 2, parentheses are needed in the formula of the compound. In more conventional naming, parentheses containing a Roman number are often used after the name of a cation to denote its oxidation state, particular for atoms that form more than one stable cation.
How should more than one polyatomic ion be indicated in a chemical formula?
One reason is that the composition of a polyatomic ion is fixed, just as that of a compound is fixed. If more than one polyatomic ion is present in an ionic compound, the use of parentheses allows a subscript to be used after the right parenthesis to designate the number of ions just as such subscript is used to designate the number of atoms in a compound.
What can be used to represent an ionic compound?
formula mass can be used for ionic compounds.
Why are parentheses used to write the formula for AlOH3?
Al(OH)3 Indicates that there are three OH groups per Al metal
An organic compound A is widely used as a preservative in pickles and has a molecular formula C2H2O2 This compound reacts with ethanol to form a sweet smelling compound B?
An organic compound A is widely used as a preservative in pickles and has a molecular formula C2H2O2 This compound reacts with ethanol to form a sweet smelling compound B known as acetic acid.
What does Parenteses mean in a mathematical term?
Parentheses, or brackets, are often used as a way of indicating that the operation within the parentheses must be evaluated before other operations. Parentheses take top priority in the order in which operations are carried out (PEMDAS in US, BIDMAS in UK).
What is the plural of the parenthesis?
A parenthesis is just one ) or ( and the plural, parentheses, is almost always used.
What is oxybenzone?
The chemical formula for Oxybenzone is C14H12O3.
What is the formula for sodium and oxygen from a stable ionic compound?
Na2O, Sodium Oxide, is a stable compound used in glass and ceramics.
What is formula is H2O?
water, H2OBut in chemistry the symbols must be upper case unless the symbol consists of two letters (Magnesium, Mg) and then the first letter must be upper case.
What is a structrual formula?
A structural formula is a type of chemical formula used in chemistry and other similar sciences. This formula shows the molecule's atom arrangement within a compound.
