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Molecular Mass

Molecular mass measures the mass of a molecule. It is measured by adding together the atomic masses of atoms the molecule is made of.

617 Questions

How many moles of Na2S2O3 react with one mole of KClO3 used in the standardization?

Standardization of sodium thiosulfate uses potassium iodate with excess potassium iodide and acidified. Iodine is liberated and that is titrated with sodium thiosulfate.

KIO3 + 5KI + 3H2SO4 -----> 3K2SO4 + 3H2O + 3 I2

I2 + 2Na2S2O3 -------> 2NaI + Na2S4O6

So 1 mole of KIO3 produces 3 moles of Iodine. 1 moles of iodine reacts with 2 moles of thiosulfate. So 6 moles of sodium thiosulfate react with 1 mole of potassium iodate KIO3.

What is molecular mass of Camphor?

The molecular mass of camphor, which has the chemical formula C10H16O, is approximately 152.23 g/mol. This value is calculated by summing the atomic masses of all the atoms in the molecular formula. Camphor is a bicyclic monoterpene and is commonly used in various applications, including medicinal and aromatic uses.

Are K and Cl molecular?

No, potassium (K) and chlorine (Cl) are not molecular. Potassium is a metallic element that exists as individual atoms, while chlorine is a nonmetal that typically exists as diatomic molecules (Cl₂) in its elemental form. When potassium and chlorine react, they form the ionic compound potassium chloride (KCl), which consists of potassium ions (K⁺) and chloride ions (Cl⁻) rather than discrete molecular units.

How much energy will be received when 3.2 moles of light with a wavelength of 650nm is absorbed?

To calculate the energy absorbed by 3.2 moles of photons with a wavelength of 650 nm, we first need to determine the energy of a single photon using the formula E = hc/λ, where h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength in meters (650 nm = 6.50 x 10^-7 m). This gives the energy per photon as approximately 3.1 x 10^-19 J. Then, for 3.2 moles of photons (which is 3.2 x 6.022 x 10^23 photons), the total energy is roughly 6.0 x 10^5 J.

What is the molecular mass of alkanes?

The molecular mass of alkanes varies depending on the number of carbon atoms in the chain. Alkanes have the general formula ( C_nH_{2n+2} ), where ( n ) is the number of carbon atoms. For example, methane (1 carbon) has a molecular mass of about 16 g/mol, while octane (8 carbons) has a molecular mass of approximately 114 g/mol. As the number of carbon atoms increases, the molecular mass of the alkane increases accordingly.

How many moles of oxygen gas are there in 180 L of oxygen at STP?

If the density of oxygen atSTP is 1,429 g/L the mass of 180 L is 257,22 g.
If the mole of oxygen (O2) is 15,999 g the number of moles is 16,077.

What is the molecular mass of Klonopin?

Klonopin is a drug derived from Clonazepam, an anti-convulsant that is used to prevent seizures, such as epilepsy. The molecular weight is 315.7112. The molecular formula is C15H10ClN3O3.