Answer:
The answer to your question is: D) 8
Explanation:
We can know the valence of an element if we know in which is located.
For example if an element is in group IA it would have 1 valence electron,
if an element is located in group IIIA it would have 3 valence electrons, if an element is located in group VIIA, it would have 7 valence electron and so on.
Neon is located in group VIIIA, so it would have 8 valence electrons.
Carbon Monoxide is a heterogeneous mixture. The answer is C. Please give brainliest thank you :)
Answer:
33
Explanation:
The atomic number of an element configuration 2,8, 8,2,13 is 33.
The electron configuration is defined as the arrangement of electrons in atomic or molecular orbitals of an atom. The sum of electrons in different orbitals shown in the electron configuration represents the atomic number of the atom.
So, atomic number of the element configuration 2,8, 8,2,13 is 33.
Answer is: 2065.15 kJ.
Balanced chemical reaction: 4NH₃ + 5O₂ → 4NO + 6H₂O<span>, ΔHrxn=−906 kJ.
m(</span>NH₃) = 155 g.
n(NH₃) = m(NH₃) ÷ M(NH₃).
n(NH₃) = 155 g ÷ 17 g/mol.
n(NH₃) = 9.118 mol.
Make proportion: 4 mol(NH₃) : 906 kJ = 9.118 mol : Q.
Q = 906 kJ · 9.118 mol / 4 mol.
Q = 2065.15 kJ.
5 dots since the lewis dot diagram only shows the valence electrons (please give me brainliest)