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klemol [59]
3 years ago
7

1. Which of the following best describes natural selection?

Chemistry
1 answer:
Shalnov [3]3 years ago
8 0

Answer:

D

Explanation:

according to Darwin, out of the vast no of individuals which compete for a place in the world, only those having advantageous variations survive and reproduce

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Formula unit of Magnesium oxide and Calcium bicarbonate and aluminum carbonate plzzzz​
Fudgin [204]

Magnesium oxide : MgO

Calcium bicarbonate:  Ca(HCO3)2

aluminum carbonate: Al2(CO3)3 or C3Al2O9

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3 years ago
You are driving your vehicle through a busy intersection. A vehicle drives across your path. You cannot avoid crashing into the
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3 years ago
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Based on the chemical formula and state of matter, which of these substances will conduct electricity?
Sergeu [11.5K]

Answer:

CuSO4(aq)

Explanation:

The aqueous form of copper sulfate will conduct electricity.

The Solid form will not be a good conductor.

C₅H₁₂ will not conduct electricity

CO₂ will not conduct electricity

  • Copper sulfate is an ionic compound
  • In aqueous solutions or molten forms, ionic compounds can conduct an electric current using free mobile ions as carriers.
  • This way, they are electrolytes.
  • In solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity.
6 0
2 years ago
How do you balance the chemical equation NaOH + H2SO4 > Na2SO4 +H2O
jenyasd209 [6]
Make sure there are the same number of atoms of each element on either side.
1) Check each one.
2) If one's out of balance, alter the equation to balance it and go back to 1)
3) When everything's balanced, you're finished!

We have 1 Na on the left and 2 Na on the right here. We'll need another NaOH to balance it:
2 NaOH + H₂SO₄ > Na₂SO₄ + H₂O
Now O is out of balance. There's 6 on the left and 5 on the right. We'll need more H₂O:
2 NaOH + H₂SO₄ > Na₂SO₄ + 2 H₂O
Fortunately H is in balance. S is also in balance here, so looks like we did it!

Need any more help?
5 0
3 years ago
What is the molar mass of magnesium hydroxide
leonid [27]
The molar mass of magnesium hydroxide is 58.3197 g/mol.
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3 years ago
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