Answer:
The vernal equinox occurs on March 20 or March 21 each year and signals the start of spring in the Northern Hemisphere (and fall in the Southern Hemisphere). The Earth tilts at an angle of 23.5 degrees on its axis relative to its plane of orbit around the sun. My source is history.com A, i think
Explanation:
hope this hlps
Answer:
Because the freezing point of pure water is 0°C, the sucrose solution freezes at ... where K b is the molal boiling point constant and m is the concentration of the solute ... Calculate the total ionic molality of a solution of 50.0 grams of aluminum.
Explanation:
Answer:
( 2 )Na2HPO4 → ( 1 )Na4P2O7 + ( 1 )H2O
Explanation:
The electronic configuration of magnesium is:
1s² 2s² 2p⁶ 3s² = [Ne] 3s²
This means that for a magnesium atom, in order to have its outermost orbital full, the easiest way would be to lose the two outermost electrons. This is seen in its relatively low first two ionization energies. <u>The third ionization energy is several times higher because the ion would move from a stable form to an highly unstable form.</u> (Mg⁺² → Mg⁺³ + e⁻).
- Sodium only has one electron in its outermost orbital, so its first ionization energy would be several times lower than the second.
hybridization is defined as mixing up of the atomic orbital with nearly same energies according to linear combination of atomic orbitals. the orbitals formed are equal in energy and are called hybrid orbitals .
