0
In chemistry, the molar mass, M, is a physical property. It is defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance.
The molar mass of atoms of an element is given by the atomic weight of the element multiplied by the molar mass constant, M
u = 1×10−3 kg/mol = 1 g/mol:M(H) = 1.007 97(7) × 1 g/mol = 1.007 97(7) g/molM(S) = 32.065(5) × 1 g/mol = 32.065(5) g/molM(Cl) = 35.453(2) × 1 g/mol = 35.453(2) g/molM(Fe) = 55.845(2) × 1 g/mol = 55.845(2) g/mol.
Multiplying by the molar mass constant ensures that the calculation is dimensionally correct: atomic weights are dimensionless quantities(i.e., pure numbers) whereas molar masses have units (in this case, grams/mole).
The molar mass of an atom is the mass of one mole of that atom. It is expressed in grams per mole (g/mol) and is numerically equal to the Atomic Mass of the atom. The molar mass is used to convert between mass and moles in chemical calculations.
Add your answer:
Earn +20 pts
How do you find the molar mass of an atom?
To find the molar mass of an atom, you need to add up the atomic masses of all the atoms in its chemical formula. This can be determined from the periodic table. The unit for molar mass is grams per mole.
Is oxygen molecular mass twice of its atomic mass?
Molar mass of it is 32gmol-1. It is twice than an atom.
What is the molar mass of OH?
The molar mass of the hydroxide ion (OH-) is approximately 17 g/mol. This includes the combined mass of one oxygen atom (16 g/mol) and one hydrogen atom (1 g/mol) that make up the hydroxide ion.
Is atomic mass and molar mass similar and mass number of particles the same?
Atomic mass and molar mass are similar concepts but not the same. Atomic mass refers to the average mass of an atom of an element, while molar mass is the mass of one mole of a substance. The mass number of particles can be the same in certain cases, such as isotopes of the same element which have the same number of protons and different numbers of neutrons.
What is atomic mass of an atom?
The atomic mass of an atom is the sum of the number of protons and neutrons in the nucleus. It is generally expressed in atomic mass units (amu). The atomic mass is important for determining the overall mass of an atom and for calculating molar masses in chemical reactions.
How do you find the molar mass of an atom?
To find the molar mass of an atom, you need to add up the atomic masses of all the atoms in its chemical formula. This can be determined from the periodic table. The unit for molar mass is grams per mole.
What does the number above the symbol represent?
The atomic number.
Is oxygen molecular mass twice of its atomic mass?
Molar mass of it is 32gmol-1. It is twice than an atom.
How many atoms of the element makes up molar mass?
The molar mass is the sum of the atomic weights of atoms contained in the molecule.
How do you find the mass of an atom with only the molar mass given?
To find the mass of an atom with only the molar mass given, you would divide the molar mass by Avogadro's number (6.022 x 10^23) to get the mass of one atom. This will give you the atomic mass in grams per mole, which can then be converted to atomic mass in atomic units by dividing by the same Avogadro's number.
What is the molar mass of ammonia sulfide?
The molar mass of ammonia sulfide (NH4)2S is calculated by adding the molar mass of two ammonia molecules (NH3) and one sulfur atom (S). The molar mass is approximately 68.2 g/mol.
What is the molar mass of OH?
The molar mass of the hydroxide ion (OH-) is approximately 17 g/mol. This includes the combined mass of one oxygen atom (16 g/mol) and one hydrogen atom (1 g/mol) that make up the hydroxide ion.
What is the Molar mass for calcium oxide?
The molar mass of calcium oxide (CaO) is 56.08 g/mol. This is calculated by adding the atomic masses of one calcium atom (40.08 g/mol) and one oxygen atom (16.00 g/mol) together.
What is the percent composition by mass of phosphorous in ammonium phosphate?
Ammonium phosphate ((NH4)3PO4) contains one phosphorus atom in the formula. To calculate the percent composition by mass of phosphorus, you need to find the molar mass of phosphorus and the molar mass of the entire compound. Then, divide the molar mass of phosphorus by the molar mass of the compound and multiply by 100 to get the percentage.
What type of alcohol has a molar mass of 4.75 grams?
A molar mass of 4.75 grams is too low for any common alcohol found in beverages. The molar mass of alcohols like ethanol, commonly found in alcoholic drinks, is around 46 grams per mole. A molar mass of 4.75 grams may refer to a smaller alcohol compound used in chemical or industrial applications.
What is the molar mass of aluminum chloride?
The molar mass of aluminum chloride (AlCl3) is 133.34 g/mol. This is calculated by adding the atomic masses of one aluminum atom and three chlorine atoms.
What is the molecular formula of the compound CH with molar mass 42.0?
The molecular formula of the compound CH with a molar mass of 42.0 g/mol is C3H3. This can be calculated by dividing the molar mass by the molar mass of a carbon atom (12 g/mol) to determine the number of carbon atoms, and then assigning the remaining mass to hydrogen atoms.
