Answer:
Option A.
Lower air pressure results in a lower boiling point
Explanation:
This is because in an open system, the lower the pressure the lesser the energy that will be required for boiling point. The is little or no collision of air molecules with the surface of the liquid
But if there is increase in pressure, more energy will be required to get to boiling point because there will be strong collision between air molecules and surface of the liquid.
Answer:
0.89 moles of N2 gas
Explanation:
From Avogadro's law:
V1/n1 = V2/n2
n2 = V2n1/V1
V1=11.2L
V2= 20L
n1=0.5 moles
n2 = ??
Therefore
n2= 20×0.5/11.2= 0.89 moles
Answer:
They're too small
Explanation:
Atoms are smaller than the wavelength of visible light
The biosphere and lithosphere, because paleontologist are interested in the history of the evolution of life. The lithosphere is the outer most crust and mantle, and the biosphere is where animals (such as humans) and plants mostly reside, both of which are spheres where artifacts and clues to the past are mostly found.
