Answer:
percentage yield =[ experimental yield / theoretical yield] x 100
Explanation:
Answer:
B They move because of the convection currents in the mantle.
Answer:
D.
They have a positive charge and are present in the nucleus of an atom along with the neutrons.
explanation:
Protons have a positive charge.

Blank # 1 - keep safe distance from the burner
Blank # 2 - Place the equipments on the right place after use
Blank # 3 - perform experiments with proper lab equipment and safety tools
Blank # 4 - Don't break any test tube or lab equipment
(maybe it can be hazardous)
They are both made up of the same protein called "histones".