Asample of ascorbic acid (vitamin c) is synthesized in the laboratory. it contains 1.50 g of carbon and 2.00 g of oxygen. another sample of ascorbic acid isolated from citrus fruits contains 6.25 g of carbon.?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.