The error caused will lower the number of moles when he did not do the second heating.This question is related to the empirical formula.
<h3>What is Empirical formula ?</h3>
A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
The empirical formula is the simplest ratio of atoms in a given compound.
we know that heating is used to eliminate most of the water molecules which are attached to the compound in the question, it's given that the second heating was not performed by the students.
This means that there are still some water molecules attached to the compound. This will imply that higher mass will be calculated for the compound because the water molecules are also considered.
So now, if we look at the calculation for the number of moles of water in this, we can say that this will be lower than the actual amount.
This is because there are some unaccounted moles of water which are still attached to the compound and these will be accounted in the compound mass rather than the waters. Therefore, the number of moles will be lower.
Hence, The error caused will lower the number of moles when he did not do the second heating.
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Answer: What best describes the reaction is "A single replacement reaction takes place because zinc is more reactive than hydrogen."
Heres the answer to the rest of that paper as well
Option B
Explanation:
Hydroelectric power plants works by converting kinetic energy to mechanical and then electrical energy in the generator.
- Hydroelectric power plants produces electricity through a step wise process aimed at converting energy.
- Moving water is first dammed in a reservoir to ensure regular and year round supply of water.
- The reservoir water is then passed through a channel .
- Moving water possess kinetic energy which is the energy due to the motion of a body.
- This kinetic energy is channeled to driving motor parts in a generator using a turbine.
- This is mechanical energy.
- As the turbine rotates electrical energy is produced.
- Hydroelectric power generation is a renewable source of energy.
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Sharks need to be protect, if they weren’t the ecosystem would not do good. If the sharks weren’t there to eat the fish and other food then the fish population would grow. If the fish population grow then the seaweed and algae population would go down because the fish would eat it all. That is why sharks need to be protected.
