List the ways in which tadpole and frogs differ from each other?
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A tadpole starts out as a body mass with an elongated tail. As metamorphosis takes effect, it begins sprouting legs and arms and grows small teeth that allow it to eat algae and small bugs. The body elongates, and the tail shrinks. The main difference, however, in the body structure of a tadpole is that it has gills. Gills allow the tadpole to breathe underwater. This is important because it does not have legs and arms yet, or the muscular structure to support itself on land.
Frogs have a strong muscular structure that allows them to be mobile both on land and in the water. Their hind legs are long and powerful, and their feet are webbed for greater swimming efficiency. Most importantly, mature frogs breathe through lungs instead of gills. Mature frogs can no longer breathe under water.
Movement
Tadpoles have one way of moving: swimming. Tadpoles will stay in the water until they evolve into frogs. Young tadpoles are not very proficient swimmers and attach themselves to foliage until they are more developed. As they mature, the tadpoles begin to learn to swim by moving their tails back and forth.
Frogs, on the other hand, can both swim and hop. The difference between a frog swimming and a tadpole swimming is the means of propulsion. Tadpoles use their tails, but frogs have no tails. Frogs use their hind legs and propel themselves forward in a kicking motion. On land, frogs can move by hopping around, something that tadpoles are not capable of.
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A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate this solid from the solution?
Describe the conditions that are necessary for snow to fall
1. a change of matter (substance) from one form to another without a change inchemical properties
B) It can be spontaneously magnetized.
C) Its magnetization is temperature dependent.
D) The electrons in the iron spin in the same direction.
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Answer:
Option A
Explanation:
Ferromagnetic materials have the property to be attracted to magnets while ferrimagnetic material is the magnetic property of materials having atomic moments aligned in opposite directions. In ferrimagnetic material as the magnetic moments are aligned in opposite direction, they cancel out the magnetic field.
Answer: A. It has opposing magnetic moments.
Explanation:
Magnetite , Fe3O4 is Ferrimagnetic and quite different from Ferromagnetic minerals because it's magnetic moments are aligned in opposite directions.
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If 2.70 mol C2H4 is reacted with 6.30 mol O2 identify the limiting reagent
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The limiting reagent is O₂.
Firstly, write the balanced chemical equation:
C₂H₄ + O₂ → CO₂ + H₂O
Then, we need to write the mole ratio of the reactants
The theoretical mole ratio is given by the coefficients of the balanced chemical equation: 3 moles of O₂ react with 1 mol of C₂H₄
Now, let's write the mole ratio of the substances available
≈
We concluded that,
Since, the ratio of the O₂ to C₂H₄ available is less than the theoretical ratio of O₂ needed to react with C₂H₄, the former is not enough: it will be consumed before the other reagent and it is the limiting reactant.
Hence, the limiting reagent is O₂.
Learn more:
Answer:
- The limiting reagent is O₂.
Explanation:
1. Write the balanced molecular equation:
2. Write the mole ratio of the reactants
The theoretical mole ratio is given by the coefficients of the balanced molecula equation: 3 moles of O₂ react with 1 mol of C₂H₄
3. Write the mole ratio of the substances available
4. Conclusion
Since the ratio of the O₂ to C₂H₄ available is less than the theoretical ratio of O₂ needed to react with C₂H₄, the former is not enough: it will be consumed before the other reagent and it is the limiting reactant.
Hence, the limiting reagent is O₂.
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