0
Want this question answered?
Be notified when an answer is posted
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.
What are formulas for compounds used instead of their common names?
Formulas are used because is a more short and simple system; all peoples understand a formula - a text may be undecipherable, the tranlation may be unsure, the common names have synonyms etc.
A chemical formula is an expression used to represent?
Chemical formulas are a shorthand way to represent chemical compounds. For example, CO2 is quicker to write than carbon dioxide.
What is the chemical formula for Sodium carbonate used in the manufacture of paper?
The chemical formula is Na2CO3.
When must parentheses be used in a formula for a compound?
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.
Why are parentheses used to write the formula for AlOH3?
Al(OH)3 Indicates that there are three OH groups per Al metal
Why do you need to write brackets after such command as getName in java?
The parentheses are used in methods to specify arguments. Some methods don't use arguments; but it would in fact be more confusing, not less, to omit the parentheses in this case - because the parentheses give some kind of consistency.The parentheses also help make it clear when something written after a dot is a field, and when it is a method. For this reason, in languages that allow you to either write or not write the parentheses for methods without arguments, I would always write them, for clarity and consistency.The parentheses are used in methods to specify arguments. Some methods don't use arguments; but it would in fact be more confusing, not less, to omit the parentheses in this case - because the parentheses give some kind of consistency.The parentheses also help make it clear when something written after a dot is a field, and when it is a method. For this reason, in languages that allow you to either write or not write the parentheses for methods without arguments, I would always write them, for clarity and consistency.The parentheses are used in methods to specify arguments. Some methods don't use arguments; but it would in fact be more confusing, not less, to omit the parentheses in this case - because the parentheses give some kind of consistency.The parentheses also help make it clear when something written after a dot is a field, and when it is a method. For this reason, in languages that allow you to either write or not write the parentheses for methods without arguments, I would always write them, for clarity and consistency.The parentheses are used in methods to specify arguments. Some methods don't use arguments; but it would in fact be more confusing, not less, to omit the parentheses in this case - because the parentheses give some kind of consistency.The parentheses also help make it clear when something written after a dot is a field, and when it is a method. For this reason, in languages that allow you to either write or not write the parentheses for methods without arguments, I would always write them, for clarity and consistency.
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.
What is the plural of the parenthesis?
A parenthesis is just one ) or ( and the plural, parentheses, is almost always used.
Does the writing in parentheses have to be in complete sentences?
No, it does not. Parentheses are used to include information that is not essential to the sentence. They can also be used to de-emphasize information. Of course, you can have complete sentences in parentheses, but it is not necessary.
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 do you use the word parentheses in a sentence?
Parentheses are the little "(" and ")" marks used to denote something said in an aside. You should enclose this phrase in parentheses.
Why are parentheses used in sentences?
Parentheses are used in sentences in two different ways. They can enclose words or figures to clarify, or they can be used to enclose numbers or letters used for a list of items.
How are parentheses used in grouping factors?
It is common to group factors in pairs with parentheses surrounding each pair.
Which comes first brackets or parentheses?
Brackets tends to be an English expression, Parentheses is used in the USA and elsewhere. Technically, Parentheses are rounded brackets but this really doesn't matter in mathematics as long as different shaped brackets/parentheses are used to separate the various elements of a mathematical expression.
Why do you put parentheses around a polyatomic ion?
You use parentheses to represent that a polyatomic ion is used more than once as a whole. For example Ba(NO2)2. It is NO2 that is used twice because Ba has a 2+ charge and NO2 has a -1 charge. So you need 2 NO2 to make the formula equal 0. So you use the parentheses to represent you are using 2 NO2
Can be used to override the order of operations?
parentheses
