The electron configuration of an atom can be determined by identifying first the right order of the electron shells. The atomic number of Magnesium is 12 so we expect the electrons also sum up to 12. The condensed electron configuration is Ne 3s2. The complete configuration is 1s2 2s2 2p6 3s2.
Answer:
If a disk rolls smoothly across a floor, what is the velocity of the point that is in contact with the floor? ... Twice the velocity of the center of the disk. Which gives the kinetic energy of an object rolling smoothly over a floor? The sum of the translational kinetic energy and the rotational kinetic energy.
Explanation:
Answer:
Empirical formula: CH₂
Explanation:
We need to find the empirical formula of a compound that has carbon and hydrogen.
To find the empirical formula of any compound, if we have the mass or mass percent, we should follow 3 steps:
<u>1. Calculate the moles, dividing by the atomic weight.</u>
The atomic weight for carbon and hydrogen are 12 g/mol and 1 g/mol, so, doing the division we have:
C = 85.5 / 12 = 7.125
H = 14.3 / 1 = 14.3
<u>2. Determine the number of atoms of each element in the formula</u>
To do this, we just divide the previous moles by the lowest quantity we obtain. In this case, the carbon:
C = 7,125 / 7,125 = 1
H = 14,3 / 7,125 = 2
This means we have 1 atom of carbon and 2 atoms of hydrogen.
<u>3. Write the empirical formula with the previously obtained atoms</u>
Now that we obtained the atoms of each element, we just write the empirical formula with these numbers:
C₁H₂ but we can neglect the number one so:
<h2>
Empirical formula: CH₂</h2>
Hope this helps
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Answer:
It's A if its on there I took this before and Right now I'm in 10th doing biotechnology
Explanation:
To show other people what DNA looks like, and to help herself think about DNA