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Molecular mass equals 2vapour density?
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
What is the atomic number and atomic mass for hydrogen?
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.
Which two particles each have a mass approximately equal to one atomic mass unit?
The proton and the neutron each have a mass approximately equal to one atomic mass unit.
What is the molecular mass of vitamin K C31H46O2?
Atomic mass for carbon,hydrogen and oxygen are 12,1 and 16 respectively.since the molecular formula of vitamin K is C31H46O2, then the respective atomic mass for each element are substituted in the molecular formula. That is,the total number of carbon present is 12 multiplied by 31 which gives 372,the total number of hydrogen present is 1 multiplied by 46 which gives 46,and finally the total number of oxygen present is 16 multiplied by 2 which gives 32.The total addition of all these gives the molecular mass 450g. answer 450.7
What is the percentage by mass of hydrogen in ammonia?
Mass of ammonia is 17. Mass of Hydrogen in it is 3. So the percentage of hydrogen by mass is 17.64%
What is the mass of two water molecules 2h20 in atomic mass units?
4 hydrogen = 4 AMU, plus 2 oxygen each with 16 total neutrons and protons would be 32, with a total of 36 AMU.
How many atoms are in the element hydrogen?
Hydrogen is a non metal element. Atomic Mass of it is 1.
What is the mass of 4 moles of hydrogen molecules (H2)?
8.086g
Molecular mass equals 2vapour density?
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
Will kilogram of hydrogen contain more atoms then kilogram of lead?
Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.
What is heavier Hydrogen gas or oxygen gas How do you know?
Oxygen is heavier as it has a mass number of 16 whereas hydrogen has a mass number of 1. Both form diatomic molecules (molecules of two atoms) making the formula masses 32 for oxygen and 2 for hydrogen.
Why hydrogen in water is heavier than pure hydrogen?
To clear up any confusion: water is not a mixture of hydrogen and oxygen; it is a compound. The hydrogen and oxygen are chemically bonded to each other to form a completely different substance. There are two reasons for the difference in density. First, molecules of elemental hydrogen are only weakly attracted to one another, so hydrogen exists as a gas with a lot of space between molecules. Water molecules are very strongly attracted to one another and so water exists as a liquid with much less space between molecules. Second, a water molecule contains two hydrogen atoms and one oxygen atom. One oxygen atom has about 16 times the mass of a hydrogen atom, so most of the mass of water is actually oxygen. One water molecule is about 9 times the mass of a hydrogen molecule.
The formula for the illegal drug cocaine is C17H21NO4 What is the percentage of hydrogen in the compound?
First and foremost, cocaine is NOT cool. To answer your question.... the "percentage of hydrogen" in this molecule pertains to the mass of hydrogen in comparison to the mass of the entire compound. First you must find the total mass, which is easily done by using your periodic table. The masses of each element in your compound are: C: 12 amu (atomic mass units) H: 1 amu N: 14 amu O: 16 amu These masses are rounded for simplicity. In entry level chemistry classes, these numbers will work fine. Now multiply each of these masses by the number of atoms of each element in your compound. (for carbon, 12*17; hydrogen, 1*21; etc.) Add these four numbers to get your compound's total mass. The percent of this mass that is hydrogen is found by dividing the hydrogen mass total by the compound's mass total. You can do this with any of the other elements in the compound to get their respective percentages. (21/303=%H)
Which element has the lowest mass on the periodic table?
The atom that has the lowest mass is hydrogen. So assuming the same numbers of atoms in each element, hydrogen would be the element with the lowest mass.
How many total hydrogen atoms are in this solution?
1 Mol of Hydrogen has a mass of 1.0078 grams (g) 1 Hydrogen molecule is 1.673 X 10-24 grams(g) Therefore, if you know how Mols of Hydrogen there are in a solution then you can calculate the number of hydrogen molecules as follows: Example: A Solution has 5 Mols of Hydrogen, How many Hydrogen molecules are there in the solution? answer: 5 X (1.0078g) / 1.673 X 10-24 grams(g) = 3.01 X 1024 atoms
Does a molecule have mass?
Yes. For example water molecules (2 hydrogen connected to 1 oxygen atom) have a bent shape.
What is the relative mass formula of hydrogen gas?
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.
