0
Is the molecular weight always a whole number multiple of the empirical formula weight?
Wiki User
∙ 11y ago
Whenever you're dealing with ratios that correspond with the number of atoms in a molecule, they have to be whole numbers. This is because the numbers are representing the number of atoms, and there can only be a whole number of atoms. To put it simply, you can have 3 atoms in a molecule, but you cannot have 3.21 atoms in a molecule.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoTrue.
Add your answer:
Earn +20 pts
What is the molecular formula for coal?
1 is always the answer
Would you expect an empirical formula to be the same even though different masses used?
This question refers to masses of elements as opposed to their molecular formulas. In the example of MgCl2 there will always be Mg in a 1:2 molar ratio with chlorine. Molar mass gives the relationship.
What are the di-atomic elements?
Diatomic elements consist of two atoms.The formula of these elements are always written with a subscript 2 in its symbol to indicate its molecular composition.examples: H2,O2.
Is N2O3 ionic or molecular?
molecular
What always stays the same in a compound?
a compound always has the same chemical formula
Is the number of atoms in a molecular formula always greater than a empirical?
No. A molecular formula can be the same as the empirical formula, such as CH4 (methane), because the two component atoms exist in a ratio that cannot be mathematically further broken down - one carbon to four hydrogens. In this case the molecular formula (the actual number of atoms per molecule), and the empirical formula (the simplest ratio of those numbers) is identical. On the other hand, ethane, C2H6 - two carbons to 6 hydrogens - has a molecular formula of C2H6 and a empirical formula of CH3, the ratio of 2 to 6 reduced to its simplest whole number form. Sooooooooooo, the molecular formula will always be equal to or greater than the empirical formula, and the empirical formula will always be equal to or less than the molecular formula. In other words (as if that wasn't enough), the molecular formula will never be less than the empirical formula and the empirical formula will never be greater than the molecular formula, but THE TWO CAN BE EQUAL. Whew!!! Ray
Would ionic or covalent molecules use the molecular formula or empirical formula?
What you write for an ionic compound is called the formula unit, but the formula unit is almost always the same as the empirical formula. The answer to your question could not be the molecular formula because an ionic compound is not a molecule.
Does a formula show the ratio elements in a compound?
depends, an Empirical formula will always (by definition) show the ratio in which atoms are combined within a molecule. a molecular formula on the other hand shows the number of atoms of each element in a molecule, the only exceptions being massive structures, crystal latices and where a molecular formula cannot be produced and is either given in the form n*(empirical formula) or just the empirical formula. do note however that reference to a formula of a molecule usually refer to the molecular formula except in the exceptions listed above.
What is the molecular formula for coal?
1 is always the answer
How do you find the molecular and empirical formulas?
There is no easy answer to this question. First, it depends what information you have to start with. Do you have the name? Do you know what elements are found in the substance?If you are given the name of the molecule, you can often find the molecular structure of that compound by simply using the Google search engine online and searching for the name. It is often give you the answer! There are certain compounds that you should be familiar with also. Also, there is a set of official rules that determine the name of a specific compound, so that if you have the formula, you can name it correctly, and if you have the name, you can determine the formula. Unfortunately, many chemicals also have common names that do not follow these rules, and you just have to memorize those, or look them up with Google.See the Related Questions and Web Links to the left for some information about how compounds are named and how to go from a formula to a name and vice versa.
Why some compounds have molecular and empirical formula?
The concept of empirical formulas apply to ionic compounds. You write the action first, the anion second, and use the minimal amount of atoms possible to make a neutral compound. A molecular formula would be the formula without necessarily the minimum amount of atoms.
Would you expect an empirical formula to be the same even though different masses used?
This question refers to masses of elements as opposed to their molecular formulas. In the example of MgCl2 there will always be Mg in a 1:2 molar ratio with chlorine. Molar mass gives the relationship.
What element has a chemical formula of CH2O?
This NOT an element, but an organic compound. CH2O is the empirical/molecular formula for methanal , formerly known as formaldehyde. Methanal is a member of the homologous series known as aldehydes. the chemical formula for aldehydes is ALWAYS written as XCHO. Hence for methanal it is HCHO NOT CH2O NB Note the 'A' in the name. NNB Ethanal formula is CH3CHO NNNB An element is a quantity/mass of the atom. Two or more atoms combined make a compound.
When using the quadratic formula x always has multiple correct solutions?
Not necessarily. Formula gives two values but they can be identical.
How can you prove that in carbon there is no salt?
In (chemistry) and biology, Carbon (C) is an element, and salt(s) are always molecular compounds. For example, table salt molecular formula is NaCl = sodium + chlorine.
Does empirical rules always apply to discrete probability distribution?
the empirical rules of probablility applies to the continuous probability distribution
What are the di?
Diatomic elements consist of two atoms.The formula of these elements are always written with a subscript 2 in its symbol to indicate its molecular composition.examples: H2,O2.
