Answer:
only 30% of total energy will be useful ..
So, Useful energy =

13.5J energy is useful
Answer:
8
Explanation:
What is the number of white blood cells permitted in a unit of leukoreduced red cells? 8 g/dL owing to chemotherapy with a drug known to cause bone marrow depression and immunodeficiency.
Neutropenia, a subtype of leukopenia, refers to a decrease in the number of circulating neutrophil granulocytes, the most abundant white blood cells<span>.</span>
When atoms in a covalent bond share electrons unequally (one atoms pulls more than the other), the bond is said to be a polar bond is formed when electrons are unequally shared between two atoms. Polar covalent bonding occurs because one atom has a stronger affinity for electrons than the other (yet not enough to pull the electrons away completely and form an ion).