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Mazyrski [523]
4 years ago
9

Determine the number of valence electrons for magnesium

Chemistry
1 answer:
12345 [234]4 years ago
3 0

Answer:

Magnesium has 2 valence electrons.

Explanation:

The atomic number of magnesium is 12. This means that it has 12 protons and 12 electrons. The first electron shell can hold 2 electrons, the second can hold 8, so the third will have 2 electrons. The outermost shell of the atom has two electrons. Therefore, magnesium has 2 valence electrons.

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3 years ago
C3H8 (g) + O2(g) → CO2 (g) + H2O(g)
lorasvet [3.4K]

Answer:

11.55 mol ≈ 11.6 mol CO2

Explanation:

                                  C3H8 (g) + 5O2(g) → 3CO2 (g) + 4H2O(g)

from reaction            1 mol                           3 mol

given                          3.85 mol                    x mol

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3 years ago
Which statements accurately describe matter? Check all that apply.
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8 0
4 years ago
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dolphi86 [110]

The correct order given below shows the changes that occurs in a mice population in response to changes in their environment:

  • The population of mice is in an environment with many black rocks
  • Mice with black for are more likely to survive and reproduce than mice with brown fur
  • After many generations, most of the mice in the population have black fur
  • A sandstorm covers most of the population's environment with brown sand
  • Mice with black fur are less likely to survive and reproduce than mice with brown fur
  • After many generations, most of the mice in the population have brown fur

<h3>What is the correct order for natural selection in the desert environment given?</h3>

Based on the process of natural selection due to envrionmental pressures, the population of the mice in the desert changes as follows before and after the environmental change:

  • The population of mice is in an environment with many black rocks
  • Mice with black for are more likely to survive and reproduce than mice with brown fur
  • After many generations, most of the mice in the population have black fur
  • A sandstorm covers most of the population's environment with brown sand
  • Mice with black fur are less likely to survive and reproduce than mice with brown fur
  • After many generations, most of the mice in the population have brown fur

Therefore, the correct order shows the changes that occurs in a mice population in response to changes in their environment.

Learn more about about adaptation at: brainly.com/question/25594630

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Which mineral property is easily observed but can be unreliable when it comes to mineral identification
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