Answer:
CaCl
2
Explanation:
As with all these problems, we assume a
100
⋅
g
of compound, and divide through by the ATOMIC masses of each component element:
Moles of calcium
=
36.1
⋅
g
40.08
⋅
g
⋅
mol
−
1
=
0.901
⋅
mol
.
Moles of chlorine
=
63.9
⋅
g
35.45
⋅
g
⋅
mol
−
1
=
1.802
mol
.
We divide each molar quantity through by the smallest molar quantity (that of calcium) to give an empirical formula of
CaCl
2
.
For ionic materials, we do not speak of the molecular formula, and the empirical formula is the formula we quote for reference.
Then you will multiply the number of moles by 6.022×1023formula units/mol . To determine the molar mass of a compound, add the atomic weight on the periodic table in g/mol times each element's subscript. Since the formula unit CaO has no subscripts, they are understood to be 1
According to the Aufbau principle, the 4s sublevel<span> is filled </span>before the 3d sublevel <span>because the </span>4s<span> is lower in energy. ... This is why when </span>electrons<span> are lost from the </span>orbitals<span> of the transition metals, they are lost from the </span>4s<span> first because it is higher in energy</span>
Answer:It would be orange
Explanation:I hope this helps
Burning is a chemical property so (c) for #1
Sodium has one valence electron in its 3rd orbit