which has highest density NH3 Ne H2 CH4
If all are in gas state at the same pressure and temperature then they will all have then same number of moles per liter
P V = n R T
so
n / V = P / RT
so which has the highest molar mass?
It is not H2, that is just 2 grams/mol
Ne = 21 g/mol
NH3 = 14 + 3 = 17 g/mol
CH4 = 12 + 4 = 16 g/mol
Well, you could say that the highest density belongs to CH4. Why? Because it's known for being a gas that loves to stick together, forming tight groups and creating a party atmosphere. It's like the densest friend at a social gathering! Just be careful not to ignite that party, or you might end up with a literal hot mess.
To determine which gas has the highest density among NH3 (ammonia), Ne (neon), H2 (hydrogen), and CH4 (methane), we need to compare their molecular weights.
The molecular weight of a gas is the sum of the atomic weights of all the atoms in its molecule.
The atomic weight can be found on the periodic table. Here are the atomic weights of the atoms in each gas:
NH3 (ammonia):
- Nitrogen (N) atomic weight: 14.01 g/mol
- Hydrogen (H) atomic weight: 1.01 g/mol
So the molecular weight of NH3 is:
(1 x Nitrogen atomic weight) + (3 x Hydrogen atomic weight) = (1 x 14.01 g/mol) + (3 x 1.01 g/mol) = 17.03 g/mol
Ne (neon):
- Neon (Ne) atomic weight: 20.18 g/mol
H2 (hydrogen):
- Hydrogen (H) atomic weight: 1.01 g/mol
CH4 (methane):
- Carbon (C) atomic weight: 12.01 g/mol
- Hydrogen (H) atomic weight: 1.01 g/mol
So the molecular weight of CH4 is:
(1 x Carbon atomic weight) + (4 x Hydrogen atomic weight) = (1 x 12.01 g/mol) + (4 x 1.01 g/mol) = 16.04 g/mol
Comparing the molecular weights, we find that:
- NH3 (ammonia) has a molecular weight of 17.03 g/mol
- Ne (neon) has a molecular weight of 20.18 g/mol
- H2 (hydrogen) has a molecular weight of 2.02 g/mol
- CH4 (methane) has a molecular weight of 16.04 g/mol
From this comparison, we can conclude that NH3 (ammonia) has the highest density among NH3, Ne, H2, and CH4, as it has the highest molecular weight.
Another way to look at this is that @ STP, 1 mol of any gas will occupy 22.4 L so d = m/v
NH3 = 17/22.4 = ?
CH4 = 16/22.4 = ?
H2 = 2/22.4 = ?