Newspaper can be recycled again and again how many times ?
Newspaper can be recycled again and again how many times ?
A. 2
B. 3
C. 4
D. 5
A. 2
B. 3
C. 4
D. 5
A. Carbon=0, Oxygen=0
B. Carbon= +1, Oxygen= -1
C. Carbon= -1, Oxygen= +1
D. Carbon=0, Oxygen= -1
A. sodium
B. diamond
C. graphite
D. magnesium
A. Zinc
B. Carbon (Graphite)
C. ZnCl²
D. MnO²(Pyrolusite)
A. dinitrogen oxide
B. nitrogen dioxide
C. chlorine gas
D. chlorine dioxide
A. Snow
B. Storm
C. Intense heat
D. Rainfall
A. Roasting
B. Forth flotation
C. Electrolysis
D. Distillation