Answer:
44.882
Explanation:
Li2S is made up of 2 Li and 1 S
Li's molar mass is 6.941 * (2) = 13.882
S's moalr mass is 32 * (1) = 32
add 12.882 + 32 = 44.882
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Answer:
Explanation:
We can use dot and cross diagrams to show how a pair of electrons forms a covalent bond.
Here is the dot and cross diagram for oxygen (O2), a diatomic molecule. Notice the lone pairs of electrons and the two shared pairs of electrons.
There are different kinds of covalent bonds:
a single covalent bond is when two atoms share a single pair of electrons. Represented by a single line (–).
a double covalent bond is when two atoms share two pairs of electrons. Represented by a double line (＝).
a triple covalent bond is when two atoms share three pairs of electrons. Represented by a triple line (≡).
Answer:
4s2
Explanation:
The electronic configuration of zinc in the ground state of the atom is 1s22s22p6 3s23p63d104s2. It can be written in a condensed form by showing the inert gas core as follows; [Ar] 3d¹⁰ 4s².
Zinc has a pseudo inert gas configuration when the 4s electrons are removed during oxidation. Hence this sublevel is usually affected when zinc atoms are oxidized according to the scheme;
Zn---->Zn^2+ + 2e-
<span>When the electron in a hydrogen atom transitions from a high energy state to a lower energy state, the energy lost from the electron is used to produce a photon corresponding to the loss of energy. That photon will correspond to exactly 1 wavelength. And since a hydrogen atom has only 1 electron, at any given moment, it can only produce 1 photon. And in order to simultaneously produce 4 photons for 4 spectral lines, that would require a simultaneous transition of 4 electrons which is 3 too many for a hydrogen atom.</span>
Both lactic acid and alcoholic fermentation begin with pyruvic acid and nadh. they are anaerobic processes that result in the production of energy in the absence of oxygen. So basically the two differences are that one makes ethanol and one makes lactic acid, and the other is that they are made by different species.
Alcohol fermentation requires aerobic conditions, while lactic acid fermentation requires anaerobic conditions.
