Answer:
Option (c) is correct.
Explanation:
The density of a substance is 0.83 g/mL.
We know that the density of water is 1 g/mL
It means the density of the substance is less that that of density of water. If the density of substance is less that water then it will float on water's surface.
Hence, the correct option is (c) "The substance will FLOAT because it's density is SMALLER than water".
%yield = 91.8
<h3>Further explanation</h3>
Given
20 g NaCl
45 g AgCl
Required
%yield
Solution
Reaction
NaCl + AgNO₃ ⇒ AgCl + NaNO₃
mol NaCl :
= mass : MW
= 20 g : 58,44 g/mol
= 0.342
mol AgCl from equation :
= 1/1 x mol NaCl
= 1/1 x 0.342
= 0.342
Mass AgCl(theoretical) :
= mol x MW
= 0.342 x 143,32 g/mol
= 49.02 g
%yield = (actual/theoretical) x 100%
%yield = (45/49.02) x 100%
%yield = 91.8
Niels Bohr was a physicist who used quantum theory to create the modern atom model.