# What is the gram molecular weight of Sodium hydroxide if its molecular mass is 40 a.m.u?

The a.m.u. is defined as the fraction of 1/12 of an atom of the carbon-12 isotope. The value is pretty nearer to the mass of a hydrogen atom. Therefore, in every compound, the gram molecular weight is numerically equal to the molecular mass in atomic mass units. Therefore the gram molecular weight of NaOH is 40 g/mol.

### How many grams does 2 moles of NaOH weighs?

This problem requires the molecular weight of the molecule (sodium hydroxide). The molecular weight can be determined by adding all the atomic masses together. Sodium's atomic mass is 23.0, oxygen is 16.0, and hydrogen is 1.0, for a total of 40.0 grams. For mole to gram conversions, take the number of moles and multiply it by the molecular mass. 2.00 moles NaOH

### How do I get one mole of something?

One mole of something is 6.02 x 1023 (602,000,000,000,000,000,000,000) molicules (or atoms, if appropriate) of that substance. A gram molecular weight of anything will have one mole of molecules in it. Find out what substance you need a mole of, then find it's gram molecular weight. Take that much of the material (the gram molecular weight) and you've got your mole of that stuff.

### How many atoms are in a sodium molecule?

The element sodium does not form molecules unless it has reacted with some other element. Every continuous piece of pure sodium contains delocalized electrons and thus has some of the characteristics of a more conventional molecule. For stoichiometric calculations, each sodium atom is regarded as a molecule compared with the smallest unit of a genuinely molecular substance such as methane, but the numerical value is more properly called a gram atomic mass or gram formula…

### Equivalent weight of sodium thiosulphate is equal to its molecular weight why?

The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; e.g., potassium permanganate (KMnO4) in acid solution, 158.038/5 g; potassium dichromate (K2Cr2O7), 294.192/6 g; and sodium thiosulfate (Na2S2O3·5H2O), 248.1828/1 g. In case of Sodium Thiosulfate the reation proceeds as under: I2 + 2 Na2S2O3 → Na2S4O6 + 2 NaI 2 Na2S2O3 ≡ I2 ≡ Cl2 ≡ 2 e Hence Na2S2O3 ≡ 1 e Thus Molecular…

### How do you find the number of moles in a compound?

First, weigh the compound. Get the chemical formula, so that you can determine how many atoms of each element are present in the molecule. Look up the gram molecular weight of each element in that compound, using the periodic table of elements. You can then put that information together to get the gram molecular weight of the molecule in question. Then divide the weight of the compound that you have, by the gram molecular weight…

### What is the difference between molecular weight in amu and molecular weight in grams?

The only difference is the name of the unit; the numerical values are the same. However, the value in amu is the mass of a single molecule, while the molecular weight in grams is the mass of Avogadro's number of molecules. The mass of Avogadro's number of molecules is called a Gram-mole. The molecular weight of , say, Hydrogen H2 is 2 amu. A gram mole of this would be 2 grams. The molecular weight…

### How many gram are in 10 mole of sodium chloride?

1 mole of Sodium Chloride weighs 58.5 grams (1 mole is the same as the molecular weight of a compound. The molecular mass of Sodium Chloride- NaCl is 23 [Na atomic mass] + 35.5 [Cl atomic mass] which is equal to 58.5 grams). Thus 10 moles would weigh 10x58.5 grams = 585 grams. The answer is 585 grams.

### How do you neutralize sodium hypochlorite?

one sodium hypochlorite molecule (molecular weight of 74.44) reacts with one molecule of sodium metabisulfite (molecular weight of 190.1), you'll need two and a half grams of metabisulfite for every gram of hypochlorite. not knowing what surface or material you are trying to apply this to (IF any) cannot give directions on use. It is important to note that the fumes produced by sodium metabisulfite include sulfur dioxide, a very irritating gas that can cause…

### What does it mean to say two solutions are isotonic?

Osmolarity of a solution depends on concentration of the osmotically active particles in a solution. if 2 solutions have equal concentrations of such solvents these solutions are said to be isotonic to each other. If one molecule of any solvent dissociates into 2 particles in a solution, like sodium chloride, then half of its gram molecular weight/L will have same osmotic effect as one gram molecular weight of glucose/L, which provides one particle/molecule in a…

### What is the equivalent weight of Na2S2O3?

The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; e.g., potassium permanganate (KMnO4) in acid solution, 158.038/5 g; potassium dichromate (K2Cr2O7), 294.192/6 g; and sodium thiosulfate (Na2S2O3·5H2O), 248.1828/1 g. In case of Sodium Thiosulfate the reation proceeds as under: I2 + 2 Na2S2O3 → Na2S4O6 + 2 NaI 2 Na2S2O3 ≡ I2 ≡ Cl2 ≡ 2 e Hence Na2S2O3 ≡ 1 e Thus Molecular…

### Specific gravity of oxygen is?

Start with the molecular weight of oxygen, twice the atomic weight because it's O2. So the molecular weight is 32. Now at school you learn that a gram-mole of any gas occupies 22.4 litres. A gram-mole of oxygen weighs 32 grams (1 gram times the molecular weight). Therefore 32 grams of oxygen occupies 22.4 litres (at normal temperature and pressure). 22.4 litres of water (specific gravity = 1) weighs 22400 grams. Therefore the specific gravity…

### How many grams of NaF form when 0.589 mol of HF react with excess Na2SiO3?

The gram molecular mass of HF is 20.01. Therefore, 0.589 mole has a mass of 11.79 grams and is sufficient to form 0.589 mole of sodium fluoride* when sodium is present in excess. The gram molecular mass of sodium fluoride is 41.99, so that 0.589 grams of it has a mass of 24.7 grams, to the justified number of significant digits. __________________________ The formula unit of both hydrogen and sodium fluorides contains a single fluorine…

### How would you determine how many grams are in a mole of any chemical element or compound?

The periodic table of elements gives a gram molecular weight for each element, which tells you the number of grams that a mole of that element weighs. So, for an element you can look up that answer immediately; for a compound, you just determine the gram molecular weight of each element that is present in that compound, and multiply by the number of atoms of that element per molecule. Note that the weight of an…

### A sample of ether has a mass of 8.12 g and occupies a volume of 3.96 L at STP. What is the molecular weight of ether?

I will assume the ether behaves as an ideal gas. In that case, a mole (gram molecular weight) of the gas occupies 22.4 liters at STP. If 3.96 liters weigh 8.12 grams, then 22.4 liters weighs x where: 8.12/3.96 = x/22.4 Turn the crank, and 22.4 liters of ether weigh 45.9 grams, the gram molecular weight of ether.

### How many grams of calcium hydroxide can be produced from 312 g of CaO?

CaO has a gram molecular mass of 40.08 + 16.00 = 56.08. The reaction between CaO and water to produce calcium hydroxide, Ca(OH)2, occurs according to the equation CaO + H2O = Ca(OH)2. Therefore, the same number of moles of calcium hydroxide can be produced as the moles of CaO supplied. The gram molecular mass of Ca(OH)2 is 40.08 + 2 (16.00 + 1.008) = 74.10. Therefore, the mass of calcium hydroxide produced with have…

### When you have 46 grams of sodium react with 160 grams of oxygen how many moles of sodium oxide are obtained?

The equation for the reaction is 4 Na + O2 -> 2 Na2O. This shows that, for complete reaction, one mole of oxygen is required for each four gram atomic masses of sodium. The gram atomic mass of sodium is 22.9898; therefore, 46 grams of sodium constitutes 2.00 moles of sodium, to more than the justified number of significant digits. The gram molecular mass of diatomic oxygen is 31.9988; therefore 160 grams of oxygen constitutes…