Answer:
C. gravity causing a curved path as an object tries to go straight.
Explanation:
It is balaned
Left side
1 Na
1 C
3 Os
1 H
=========
Right side
Given that W=mg:
The weight of the box would be 50 N taking the value of 'g' as 10ms-2. Taking the value of 'g' as 9.8ms-2, the weight of the box would be 49 N.
(N = Newtons)
By weight the hydroxides are 45.9% of the weight
