1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sdas [7]
2 years ago
15

Which statement below best describes the Theory of Plate Tectonics?

Chemistry
2 answers:
k0ka [10]2 years ago
3 0

A. plate tectonics slowly move in what is called Continental Drift, the Earth used to be one continent called Pangea and has shifted ever since.

Inessa [10]2 years ago
3 0

Answer:

A

Explanation:

The plates float on the magma and move with the molten rock underneath.

You might be interested in
I need help with this! I WILL GIVE YOU BRAINLIST!
melisa1 [442]

Answer:

Farther, longer, longer

Explanation:

The further away a planet is from the sun, the larger the orbit. This makes the time for the planet to make a revolution around the sun longer.

8 0
2 years ago
An neutral atom has 40 protons and 10 neutrons what is the mass number
olya-2409 [2.1K]

Answer:

50

Explanation:

40-10 = 30…...…............

5 0
3 years ago
Read 2 more answers
Solid aluminum and gaseous oxygen read in a combination reaction to produce aluminum oxide. 4Al(s) + 3O_2(g) rightarrow 2Al_2O_3
Kryger [21]

Answer:

4.7 g. Option 5 is the right one.

Explanation:

4Al(s) + 3O₂ (g) ⇄ 2Al₂O₃ (s)

We convert the mass of reactants to moles, in order to determine the limiting.

2.5 g Al / 26.98 g/mol → 0.092 moles of Al

2.5 g O₂ / 32g/mol → 0.078 moles of O₂

Ratio is 4:3. 4 moles of Al react with 3 moles of O₂

Then, 0.092 moles of O₂ would react with (0.092 . 3)/ 4 = 0.069 moles O₂

We have 0.078 moles of O₂ and we need 0.069 moles, the oxygen is the limiting in excess. Therefore the Al is the limiting reactant.

Ratio is 4:2. 4 moles of Al, can produce 2 moles of Al₂O₃

Then, 0.092 moles of Al would produce (0.092 .2) / 4 = 0.046 moles

If we convert the moles to mass, we find the anwer:

0.046 mol . 101.96 g/mol = 4.69 g

5 0
3 years ago
Help pls quickly!!!!!
Svetradugi [14.3K]
B is remaining the constant speed for 4 mins
7 0
2 years ago
The area of a triangle with a base of 4 meters and a height of 6 meters.
Tanya [424]

Answer: I believe the answer is 12

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?
    15·1 answer
  • What is the de Broglie wavelength (in nm) of a proton of traveling at 3.18% of the speed of light?
    15·1 answer
  • Please help Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Which of the following correctly shows the electron
    5·1 answer
  • Do all crystals have the same internal arrangements?
    7·1 answer
  • Beta particles will: 1. bend toward the North Pole of a magnet. 2 bend toward the South Pole of the magnet 3 not be affected by
    10·2 answers
  • Clay has a negative charge. What (3) nutrients need by plants have a<br> positive charge?
    7·1 answer
  • What is the wavelength of light that has an energy of 8.0 x 109J​
    12·1 answer
  • Similarities and differences between covalent bonds and molecular interactions
    12·1 answer
  • You read a primary source and a secondary source that discuss the same
    7·2 answers
  • Determine the molarity for each of the following Solution: 98.0 of phosphoric acids H3PO4 in 1.00L of Solution.​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!