Hey there.
By adding up all the "exponents," you'll get a number of 19. By looking at a periodic table, the element of such an atomic number is potassium or K.
Answer:
2.76 gram
Explanation:
2AI + 6HCl → 2AlCl3 + 3H2
- get the mol of aluminum => n = m / M = 25 / 27 = 0.925 (mol)
- get the ratio mol of Hydro => nH2 = 0.925 * 3 / 2 = 1.38 (mol)
- get weight of hydro mH2 = n x M = 1.38 x 2 = 2.76 (gram)
Explanation:
Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.
Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.
Answer:
Which set of orbitals are degenerate?
Degenerate is used in quantum mechanics to mean 'of equal energy. ' It usually refers to electron energy levels or sublevels. For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy, as shown in the diagram.
Explanation:
The answer is B 5.40 x 10^14 Hz