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Answer:
Organic evolution is the theory that more recent types of plants and animals have their origins in other pre-existing forms and that the distinguishable differences between ancestors and descendents are due to modifications in successive generations.
Explanation:
The chemical bonds in CH4 are all single bonds. C only can bond 4 times because it needs 8 electrons in it's outer shell and only has four right now. The bonds represented are all single bonds because there are two electrons present on each side of the carbon. Two electrons, in this case, equals one bond.
Answer:
NO₃⁻.
Explanation:
- Spectator ions are the ions that is present in the same form on both sides of a chemical equation (do not change).
For the reaction: Mg(s) + Zn²⁺ + 2NO₃⁻ → Mg²⁺ + 2NO₃⁻ + Zn(s),
- The reactants' side contains two ions
: Zn²⁺ and NO₃⁻.
- Also, the product's side also contains two ions
: Mg²⁺ and NO₃⁻.
<em>Because the nitrate anions are present on both sides of the equation, they are spectator ions.</em>
Answer:
170.38g is the mass of 1 mole of C₁₂H₂₆
Explanation:
To solve this question we must find the molar mass of the alkane C₁₂H₂₆. The molar mass is defined as the mass of one mole of a substance.
In 1 mole of C₁₂H₂₆ we have 12 moles of Carbon and 26 moles of Hydrogen. With the periodic table of elements we can know the molar mass of 1 mole of Carbon and 1 mole of hydrogen, and, thus, the molar mass of the alkane (Molar mass C = 12.01g/mol, H = 1.01g/mol)
<em>Molar mass C₁₂H₂₆:</em>
12C = 12*12.01g/mol = 144.12g/mol
26H = 26*1.01g/mol = 26.26g/mol
144.12g/mol + 26.26g/mol =
<h3>170.38g is the mass of 1 mole of C₁₂H₂₆</h3>