A type of atom can be of any type. Elements are pure chemicals that cannot be converted into more basic compounds by conventional chemical processes.
A chemical element is a substance that cannot be disassembled chemically or physically into simpler substances. Chemical elements are the basic building blocks of matter because they are pure substances made up of atoms with the same atomic number (number of protons) in their nuclei. A chemical element is essentially a pure substance that cannot be disintegrated, degraded, or changed into other compounds through physical or chemical methods.
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Answer:
We have 1.69 moles of gas inside the balloon
Explanation:
Step 1: Data given
Volume of the balloon = 18.9 L
Temperature = 27.1 °C = 300.25 K
Pressure in the balloon = 2.20 atm
Step 2: Calculate the number of moles
p*V = n*R*T
n= (p*V)/(R*T)
⇒with n = the number of moles of gas
⇒with p = the pressure of gas = 2.20 atm
⇒with V = the volume of the gas = 18.9 L
⇒with R = the gas constant = 0.08206 L*atm/mol*K
⇒with T = the temperature = 27.1 °C = 300.25 K
n = (2.20 * 18.9) / ( 0.08206*300.25)
n = 1.69moles
We have 1.69 moles of gas inside the balloon
Answer:
A) The energy of a given orbital increases as the nuclear charge Z increases.
Explanation:
The energy of an orbital is as higher as the attraction force between protons and electrons is lower. So, as far as from nuclei, the orbital is more energetic. When Z increases, that means that the number of protons increases, so the attraction force increases, then the energy of a given orbital decrease.
Letter "b" is correct because of the Linus Pauling diagram in which the levels and sublevels are displaced to know its energy. The sublevel 3d is more energetic than the sublevel 4s, so it's necessary both quantum numbers.
Letter "c" is correct because the electrons at the same orbital have a greater repulsive force, so they can't shield electrons at the same orbital. But the inner electrons are attracted to the nuclei, so the repulsive force, plus the distance, will be less effective.
Letter "d" is correct because the penetration effect means the ability of an orbital to attract an electron. So, when the division in sublevels can explain that energy from the orbitals.
Letter "e" is correct because in the hydrogen atom there is only one orbital with one quantum number n and one quantum number l, which are n = 1, l = s, so the energy depends only on the quantum number n.
Answer:
Nitrile, amide, carboxylic acid, phenyl (aka. arene)
**There are so many functional groups, so I may list some you don't know. There may also be some that I am not aware of. However, these are all the ones I can see.**
Explanation:
Nitrile: (bottom-left) N triple bonded to C
Amide: (middle) N single bonded to 3 carbons
Carboxylic Acid: (bottom-right) C-CO2H
Phenyl: (top-right) six carbon ring with alternating double bonds