Chao is thinking about doing a project on plate tectonics for the school science fair. Which design would best relate to how the movement in the Earth’s mantle is related to plate motion?a pot of boiling water to which Chao will add food coloring to show the movement of the water
a flat shallow pan filled with a thick liquid heated by a hot plate with thick wooden blocks on top of the liquid
a flat shallow pan filled with small metal beads topped by an assembled puzzle that is shaken from side to side
a flat shallow pan filled with a thick liquid that can be heated by a hot plate with pieces of a thin plastic sheet floating on top of the liquid

The Correct answer is CH3COOH

The explanation:

when the electrolyte is: A substance that dissociates into ions in solution and acquires the capacity to conduct electricity.

- Electrolyte is actually a compound that dissolves easily in water and creates a solution that becomes a good conductor of electricity.

- The existence of free ions is the reason why the solution becomes a good conductor of electricity.

-The compounds that release small number of free ions on dissolving in water are called weak electrolytes

-and those that release large number of ions are strong electrolyte.

acetic acid partially dissociates in water to form two ions, H+ and CH3COO- , therefore making it a weak electrolyte

Answer:

Explanation:

you are on the moon or on Earth. Mass is an intrinsic property of matter and is a measure of the amount of matter in an object. It does not depend on the location of the object or the gravitational field it is in. Therefore, your mass would be the same on the moon as it is on Earth.

It would be the same on the moon as on Earth

Pentane burns in plenty of air: CO₂ and H₂O is produced.

C₅H₁₂ + 8 O₂ → 5 CO₂ + 6 H₂O

Pentane burns in limited amount of air: CO or even C is produced along with H₂O.

2 C₅H₁₂ + 11 O₂ → 10 CO + 12 H₂O

Explanation

Pentane is a hydrocarbon. There are five carbon atoms in each of its molecule. Its molecular formula will be C₅H₁₂.

Hydrocarbon fuels burn to produce CO₂ when there's plenty of air.

? C₅H₁₂ + ? O₂ → ? CO₂ + ? H₂O

• Among all species in this reaction, C₅H₁₂ has the largest number of atoms per molecule. Assume that the coefficient of C₅H₁₂ is one.

1 C₅H₁₂ + ? O₂ → ? CO₂ + ? H₂O

• C₅H₁₂ is the only reactant that contains C atoms. There are 5 C atoms in a C₅H₁₂ molecule. There should be the same number of C atoms in the products.
• CO₂ is the only product that contains C atoms. There are one C atom in each CO₂ molecule. 5 C atoms correspond to 5 CO₂ molecules.

1 C₅H₁₂ + ? O₂ → 5CO₂ + ? H₂O

• Similarly, C₅H₁₂ is the only reactant that contains H atoms. H₂O is the only product that contains H atoms. There are 12 H atoms in one C₅H₁₂ molecule, which corresponds to 6 H₂O molecules.

1C₅H₁₂ + ? O₂ → 5CO₂ + 6 H₂O

• Both CO₂ and H₂O are products that contains O atoms. There are 5 × 2 + 6 × 1 = 16 O atoms in total in 5 CO₂ molecules and 6 H₂O molecules. The 16 O atoms on the product side corresponds to 8 O₂ molecules on the reactant side.

1C₅H₁₂ + 8 O₂ → 5CO₂ + 6 H₂O

1 C₅H₁₂ + 8 O₂ → 5 CO₂ + 6 H₂O

• All coefficients shall be whole numbers. If there's any fraction in this equation, multiply both sides by the least common multiple of their denominators.

Hydrocarbon fuels burn to produce H₂O and CO when there's a limited supply of air. C (soot) might also be produced. Assuming that only CO is produced. Try to balance the equation using the same method.

1 C₅H₁₂ + 11/2 O₂ → 5 CO + 6 H₂O

2 C₅H₁₂ + 11 O₂ → 10 CO + 12 H₂O

Less O₂ is consumed for each mole of C₅H₁₂.

Consider: What would be the balanced equation when only C is produced?

Reference

"Products and effects of combustion", GCSE Chemistry (Single Science), BBC Bitesize.