the complete question in attached figure
Let
x------------------- > actual yield
y------------------- > theoretical yield
z------------------- > percent yield
we have that
z=x/y
we know
x=47 g
y=56 g
therefore
z=47/56=0.839 ---------------- > 83.9%
the answer is the option C 83.9%
Answer:
2H3PO4 +3Ca(OH) 2 = Ca3 (PO4) 2 +6H20
Because you need to know what you are looking for before actually trying something so you can prevent any accidents by doing stuff at random
The ability to attract an electron for bonding is called (option B) Electronegativity.