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Answered 2010-03-28 03:45:56

Molecular mass of heavy hydrogen(deuterium) is 4 a.m.u. it's atomic mass = 2 a.m.u.

Alternatively it can be stated that 1 mole of molecular hydrogen weighs 4 grams.

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The relative molecular mass of hydrogen gas is 2.


Hydrogen has a molecular mass of 1 where as an oxygen atom has a molecular mass of 16 so oxygen is heavier than hydrogen


The gram molecular mass of H2 is 2g.


vapor density =density of gas/density of hydrogen gas=mass of a certain vol. of gas/mass of same vol. of hydrogen gas=mass of n molecules of gas/mass of n molecules of hydrogen gas=mass of 1 molecule of gas/mass of 1 molecule of hydrogen gas=molecular mass of gas/molecular mass of hydrogen gas=molecular mass/22 x vapor density=molecular mass


16. Carbon has a molecular mass of 12, and hydrogen has a molecular mass of 1. 12 + 4(1) = 16.


On the periodic table it says that one mole of hydrogen atoms weighs 1.008 grams. However, Hydrogen is a diatomic molecule (it is composed of two hydrogen atoms in its molecular state). Hence, the molecular mass of hydrogen is 1.008 multiplied by 2 = 2.016g this is the mass of one mole of hydrogen. Hope this helps!


Deuterium a heavy isotope of hydrogen also known as heavy hydrogen.


The molecular mass of hydrogen gas is 2. A molecule of hydrogen gas contains two hydrogen atoms covalently bonded. Since each hydrogen atom has an atomic mass of 1 (as we can derive from the Periodic Table of Elements), the molecular mass of hydrogen gas as a molecule is 1 + 1 = 2.


Because there are three isotopes of hydrogen. These are normal hydrogen, heavy hydrogen, and heavy heavy hydrogen. Each has an atomic mass that is a whole number but the amounts of these isotopes with one or more neutrons are relatively small and the atomic mass of hydrogen in general is the average of all three.


The atomic mass of hydrogen is 1u. Atomic mass of bromine is 80u. Therefore, the molar mass of hydrogen bromide is 1+80=81u.


Since each water molecular contains two hydrogen atoms, the atomic mass of oxygen is 18 - 2 = 16.


The density of a gas is proportional to its molecular or atomic weight. Hydrogen has a molecular mass of about 2, while helium has an atomic mass of about 4. Therefore, helium is about twice as dense as hydrogen.


Type your answer here... The hydrogen atoms in heavy water have a neutron in the nucleus, doubling the mass.


The formula of hydrogen is H2. The atomic mass of 1 hydrogen atom is 1, so the molecular mass of 2 hydrogen atoms is 2. The formula of carbon dioxide is CO2, 1 carbon atom combined with 2 atoms of oxygen. 1 carbon atom has the atomic mass of 12. 1 oxygen atom has the atomic mass of 16. 2 oxygen atoms have the molecular mass of 32. Thus. the molecular mass of carbon dioxide is 32 + 12 = 44. Since the molecular mass of a gas determines its rate of diffusion, hydrogen will diffuse faster than carbon dioxide as it has a lower molecular mass of 2 as compared to 44. The rate of hydrogen is also 22times faster than the rate of diffusion of carbon dioxide,


Each isotope of each element has an atomic mass number. The atomic mass numbers for hydrogen are 1, 2 and 3. That's because hydrogen has three isotopes. "Regular" hydrogen has a single proton in its nucleus. It's atomic mass is 1. There is also heavy hydrogen, which has a neutron bound to the proton in its nucleus. It's atomic mass is 2. Heavy heavy hydrogen has two neutrons bound together with the proton. It's atomic mass is 3. A link is provided to the Wikipedia article on hydrogen.


You need to be a bit more specific with your question. I presume you mean the molecular mass of water? This can be worked out from your periodic table. We know the atomic mass of hydrogen is ~1, and oxygen is ~ 16. The molecular formula for water is H2O, therefore we have (2*1) for the Hydrogen, + (1 * 16) for the oxygen. Therefore the molecular mass of water is ~ 18. Note: I rounded the molecular values off to 1 and 16 for the purposes of a simple example. The real molecular mass of hydrogen is 1.00794 and for oxygen is 15.9949. If you have to use more significant figures, use these numbers.


The chemical formula of sodium hydrogen carbonate is NH4HCO3.The molecular mass is 84,0066 g.


Hydrogen chloride = HCl (hydrochloric acid) The molecular weight is the same thing as the molar mass so the molar mass of HCl is about 35.5 grams.


Helium is denser than hydrogen because as the molecular or atomic mass of a gas increases, density increases as well. Hydrogen has a molecular gas of about 2 g/mol while helium has an atomic mass of about 4 g/mol.


Hydrogen has by far the smaller molecular mass (and atomic number) making it the smallest element


Since carbon has an atomic mass of 12 and hydrogen has an atomic mass of 1, the mass of the empirical formula is 12 + 3 = 15. 60/15 = 4; therefore, the molecular formula is C4H12.


Water molecules are composed from hydrogen and oxygen. Their atomic masses are 1 and 16 respectively. The molecular mass of water is 2x1+16=18u.


This is not a correct term; probably you think to compounds with a big molecular mass.


Hydrogen gas is molecular.


Normal hydrogen has one proton and no neutrons in its nucleus, so it has a mass of one. Heavy hydrogen often called deuterium has one proton and one neutron, so it has a mass of two instead of one. There is also tritium which has one proton and two neutrons, so a mass of three.



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