Answer: 14.0 moles of carbon.
Explanation: Using the Avogadro's number,
6.02 x 10^23 atoms -----> 1 mole of carbon .
8.43 x 10^24 atoms ----> 8.43 x 10^24/ 6.02 x 10^23 = 14.0moles of carbon.
70.0 g. The decomposition of 125 g CaCO3 produces 700 g CaO.
MM = 100.09 56.08
CaCO3 → CaO + CO2
Mass 125 g
a) Moles of CaCO3 = 125 g CaCO3 x (1 mol CaCO3/100.09 g CaCO3)
= 1.249 mol CaCO3
b) Moles of CaO = 1.249 mol CaCO3 x (1 mol CaO/1 mol CaCO3)
= 1.249 mol CaO
c) Mass of CaO = 1.249 mol CaO x (56.08 g CaO/1 mol CaO) = 70.0 g
Atoms are made up of three basic particles: protons, electrons, and neutrons. Protons and neutrons are found in the nucleus, and the nucleus is found in the very center of an atom. Protons are positively charged whereas neutrons have no charge.
Electrons are found on the electron shells, and the electron shells are found in in the outermost region of an atom. The outermost electron shell contains valence electrons. Electrons are negatively charged.
The number of protons vary depending on the atomic number of an atom. The number of neutrons vary depending on the atomic mass and atomic number of an atom. To find the neutron you must subtract the atomic mass from the atomic number. The number of electrons in a neutral atom also vary depending on the atomic number.
Sorry this is so long. I didn't quite understand your question so I added the last paragraph in just in case it was helpful in any way. I hope I helped!
<span>Warm air lifted over a moving cold air mass will produce a cold
front.</span>
The atom would have to contain the same amount of electrons in both the ground start and the excited state. If you count up the electrons in that configuration, there are 7 electrons. The atom with 7 electrons is Nitrogen. If you look at the configuration for Nitrogen, it is 2-5. So assuming you know how to write electron configurations out, your answer would be this:
<span>Nitrogen (N) = 1s2 2s2 2p3 in the ground state. Count those electrons up and you still have 7 electrons. Excited state is when an atom moves to a higher energy level. You'll still have the same number of electrons.</span>
