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andrew11 [14]
2 years ago
5

Please help! USATestprep K12

Chemistry
2 answers:
NeX [460]2 years ago
8 0

Answer:

its none above

Explanation:

food webs have arrows that show the flow of energy from one orhganism to the next

bar graphs have bars and numbers and diagrams have words and pictures so it D

ycow [4]2 years ago
6 0

Answer: C

Explanation:

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A graph of coal reserves in the United States versus time slopes downward.
Dafna1 [17]

Answer:

increased

Explanation:

I believe to be increased ,because the coal is a natural resource to be used.

i really hope it helps

4 0
3 years ago
Read 2 more answers
Identify the element whose highest energy electron would have the following four quantum numbers?
ad-work [718]

C. 6, 1, 0, -1/2

Explanation:

The four quantum numbers are:

  • Principal quantum number (n): this represents the energy level in which an orbital is located.
  • Azimuthal quantum number gives the shape of the orbitals in subshells accommodating the electrons.
  • Magnetic quantum number gives the number of spatial orientations or degeneracy of the orbitals in the subshells.
  • Spin quantum number describes the spinning of an electron in either clockwise or anticlockwise directions.

To know the electron with the highest energy, we use the principal quantum number values.

n values takes whole numbers i.e n = 1,2,3,4,5,6,7.............

The higher the value, the higher the energy level.

From the given quantum numbers, C has the highest energy levels.

Learn more;

Quantum numbers brainly.com/question/9288609

#learnwithBrainly

4 0
3 years ago
Pls hlp me with these questions: brainliest, ratting, thx, etc.
daser333 [38]
1 elements
2 they have same number of valence electrons
3 period
4 0
2 years ago
What is the symbol for an ion with a 3+ charge, 28 electrons, and a mass number of 71
zhenek [66]

Answer:

Ga3+ is a gallium cation

7 0
2 years ago
Boron carbonate decomposes into boron oxide and carbon dioxide. How many moles of CO2
Paul [167]
<h3>Answer:</h3>

15 moles

<h3>Explanation:</h3>

The decomposition of boron carbonate is given by the equation;

B₂(CO₃)₃(s) → B₂O₃(s) + 3CO₂(g)

Moles of boron carbonate decomposed is 5.0 mol

To find the moles of CO₂ produced we are going to use the mole ratio.

Mole ratio of B₂(CO₃)₃ to CO₂ is 1 : 3

Therefore;

Moles of CO₂ = Moles of B₂(CO₃)₃ × 3

                      = 15 mol

Therefore, 15 moles of CO₂ will be produced

   

4 0
3 years ago
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