Answer:
Explanation:
They play a very important part. The geometry is not a straight line. It is an angle over 90 which means that the molecule has the same general shape as a boomerang. The two hydrogens and the 2 lone electron pairs try to get away as far as possible from each other. The actual shape results in a tetrahedron shape. But the two hydrogens and 1 oxygen actually look like the aforementioned boomerang.
Answer:
isostatic adjustment movement
(0.878)(267.8) + (0.122)(269.9)=
268 u (three sig fig)
Check my calculations
If each atom of element D has 3 mass units and each atom of element E has 5 mass units, a molecule composed ..... The electron configuration for the carbon atom (c) is 1s2 2s2 2p2.
<span>30 grams.
The definition of "half life" is the amount of time it takes for half of a sample of the substance to radioactively decay. Since the half life is 64 hours for Yttrium-90, after 64 hours, you will only have half of that isotope left, therefore there will be 120g / 2 = 60 g left after 64 hours. But you need to wait another 64 hours after that to reach 128 hours. So halve the amount again, getting 60g/2 = 30g after 128 hours.
So the original 120 gram sample will decay to 30 grams after 128 hours.</span>