Answer:
0.369 moles of H₂O.
Explanation:
The molar mass of the hydrate salt is equal to the molar mass of the anhydrous salt plus the molar mass of water times the moles of water.
M(MgSO₄·7H₂O) = M(MgSO₄) + 7 × M(H₂O)
M(MgSO₄·7H₂O) = 168 g/mol + 7 × 18 g/mol
M(MgSO₄·7H₂O) = 294 g/mol
Every 294 g of MgSO₄·7H₂O there are 126 g of H₂O. So, for 15.5 g of MgSO₄·7H₂O,
Answer:The bigger the atom the lesser the ability of the atom to hold on to its valence electrons.
Explanation:
The larger the atom, the lesser the tendency for the atom to withhold its valence electrons.
The size of an atom is usually estimated in terms of its atomic radius. Across the period in the periodic table, the atomic radius decreases progressively from left to right. This is due to the progressive increase in the nuclear charge (i.e., the number of protons in the nucleus) without an attendant increase in the number of electron shells.
Similarly, down the group, the atomic radius increases progressively from top to bottom due to the successive number of electrons' shells.
Thus, the larger the atom's radius, the smaller the Ionization energy because of the increasing shielding effect of inner shell electrons on the electron to be removed from the nuclear attraction.
Finally, we can conclude that as the atom becomes larger, the tendency to withhold the electrons on the outer shell decreases due to distance and the shielding/ screening effect.
Answer:
That's because Earth is so much larger. If the moon were bigger enough, it might be able to “pull a Charon” and lock us in as well. “It might be that you'd have to take a vacation to the other side of the Earth to ever see the moon,” Siegler said. More than that, becoming tidally locked with the moon would change time.
Explanation: