Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.
<span>When two or more substances are mixed together but not chemically joined they are called as mixtures. Therefore, it is only a physical change taking place.
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I hope this helps you! Good luck :)
Answer:- 0.158 moles
Solution:- Moles are calculated on dividing the grams by the molar mass.
25.0 grams of
are given and we are asked to calculate the moles.
For this we need the molar mass so let's calculate it first.
Molar mass is the sum of atomic masses of all the atoms present in the molecule.
Molar mass = 
= 158.036 gram per mol
Now, we will divide the given grams by molar mass to get the moles and the set is shown as:

= 
So, there are 0.158 moles of
.