Your answer is A mixed with.
Answer:

Explanation:
B.

BALANCED. 7C, 16H, and 22O on each side of equation.
A.

NOT BALANCED. 7C on left and 6C on right.
C.

NOT BALANCED. 16H on left and 10H on right.
D.

NOT BALANCED. 7C on left and 14C on right.
Answer:
P.E = 25.48 J
Explanation:
Given data:
Mass = 2 Kg
Height = 1.3 m
Potential energy = ?
Solution:
Formula:
P.E = m . g . h
P. E = potential energy
m = mass in kilogram
g = acceleration due to gravity
h = height
Now we will put the values in formula.
P.E = m . g . h
P.E = 2 Kg . 9.8 m /s² . 1.3 m
P.E = 25.48 Kg. m² / s²
Kg. m² / s² = J
P.E = 25.48 J
B) They worries people would destroy the animals and land.
Molar mass of FE2O3=2(55.85)+3(16)=159.7
2.56g*1mol/159.7*2mol/1mol*55.85g/1mol=1.79g