It makes sense that an inner shell electron would be tougher to remove than a valence electron because the inner shell electron is closer to the positive nucleus of the atom. Seeing as an electron caries a negative charge it would be too attracted to the positive core to leave readily. Also, the inner shell electrons are constantly repelling electrons outside of it's energy level (however the reason these electrons outside innershell energy levels don't simply fly away is the charge of the positive core overcomes the smaller charges of the comparably negligible inner shell electrons, but that repulsion is still there.
Answer : Option B) A Comet
Explanation : A comet is mainly composed of rock, dust, ice and frozen gases like carbon monoxide, carbon dioxide, methane, and ammonia. It is sometimes called as dirty snowballs, recent studies on comets have revealed that the ice of a comet is covered by a crust. Comets also contain many variety of organic compounds as well as the gases.
Comets when comes near the sun while revolving around it loses some of the ice from its crust which gets vaporized by sun's heat.
Molecular weight of vanillin = 152 g/mol
Futher molecular formula of vanillin is C8H8O3
Atomic weight of oxygen = 16 g/mol
Thus, 152 g of vanillin contains 16 g of oxygen
∴ 0.045 g (45 mg) of vanillin contains
= 0.00473 g
Also, number of moles of vanillin in 0.045 g sample =
Now, 1 mole = 6.023 X 10^23 molecules
∴ 2.96 X 10^-4 mole = 1.78 X 10^20 molecules
From molecular formula, it can be seen that 1 molecule of vanallin contain 3 atoms of oxygen
∴1.78 X 10^20 molecules contain 3 X 1.78 X 10^20 = 5.34 X 10^20 oxygen atoms
Answer: the mass of the object
Explanation: To find density, the equation d= m/v is needed where m= mass and v= volume