What happens during a chemical reaction?
2 answers:
Answer: Option (a) is the correct answer.
Explanation:
A chemical reaction is defined as the reaction in which exchange of electrons take place between reactant molecules due to which bonds between reactant molecules are broken down.
This leads to the formation of new compounds known as products which occur due to formation of bonds.
For example,
Here, bonds between HCl and NaOH are broken down and formation of NaCl and occur due to new bond formation.
Thus, we can conclude that during a chemical reaction the 'reactants' bonds break, and bonds of the products form.
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Answer:
1.
2.
Explanation:
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1. In this case, since the volume of the rock is obtained via the difference between the volume of the cylinder with the water and the rock and the volume of the cylinder with the water only:
Thus, the density turns out:
2. In this case, given the density and mass of aluminum we can compute its volume as follows:
Moreover, as the volume is also defined in terms of width, height and length:
The height is computed to be:
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