Which must be the same when comparing 1 mol of oxygen gas, o2, with 1 mol of carbon monoxide gas, co?
a. the mass
b. the volume
c. the number of molecules
d. the number of oxygen atoms

Answer : Option C) The number of molecules.

Explanation : When comparing 1 mol of oxygen gas with 1 mol of carbon monoxide the number of molecules must be same. Each mole should contains in it. Irrespective of the weight or atomic number avogadro's number remains constant for every mole of atom.

It is a number which is usually given for atoms or molecules, that are contained in the amount of substance given by one mole.

It is denoted by .

The units of Avogadro's number can be expressed in terms of electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.