Answer:
0.48 mols
Explanation:
to convert moles to mass u need to divide mass by the molar mass of NaCl which is 58.44g/mols.
28g ÷ 58.44g/mol = 0.48 mols
Answer:It means that you can’t see though that meateral.
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The person that helped you out.
Explanation:
Answer : The number of electrons shared between 1 nitrogen atom and 1 carbon atom are, Six.
Explanation :
Covalent bond : Covalent bonds are made by the sharing of valence electrons between the non-metal elements.
One covalent bond is formed by the sharing of two electrons.
In the given structure of compound, one nitrogen atom bonded with one carbon atom by three covalent bonds. That means the number of sharing electrons between the one nitrogen atom and one carbon atom are six.
Answer is: the two electrons in the fourth shell.
Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.
Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²; calcium has two valence electrons (4s²).
In reactions it lose those two electrons ang form cation with positive charge 2+.
Atomic number is the number of protons, which is characteristic of a chemical element.
Beryllium, magnesium,calcium and strontium are alkaline earth metals. The elements have very similar properties.
Alkaline earth metals have in common an outer s- electron shell (two electrons).