Answer:
easy
Explanation:
c.
the pressure of the air above the substance.
Answer:
N₂
Explanation:
Using ideal gas law, you can find moles of the gas:
PV = nRT
PV / RT = n
<em>Where P is pressure (2.00atm); V is volume (4.0L), n are moles of gas; R is gas constant (0.082atmL/molK); and T is absolute temperature (30.0°C +273.15 = 303.15K)</em>
Replacing:
2.00atm×4.0L / 0.082atmL/molK×303.15K = n
<em>0.322 moles of gas = n</em>
The difference in mass is equal to mass of the gas. Knowing both moles and mass of the gas, molecular mass of the gas is:
9.1g / 0.322mol = <em>28.3g/mol</em>
As the gass is a diatomic gas, each atom weights 28.3/ 2 = <em>14.1g/mol </em>and this is the mass of nitrogen atom. Thus, the diatomic gas is<em> N₂</em>
In the nucleus of each cell, The DNA molecule is packaged in to thread like structures called chromosomes.