NaCl + AgNO are the reactants since the reactants are always on the left side of the yield.
B 3-4 is the auto
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<u>Answer:</u> The density of substance is 
<u>Explanation:</u>
To calculate density of a substance, we use the equation:

We are given:
Mass of substance = 61.6 g
Volume of substance = 
Putting values in above equation, we get:

Hence, the density of substance is 
It would be the top soil. The most dissimilar layer is the uppermost layer.