Which statement regarding significant figures is false?
a. zeros can be significant
b. when multiplying, the answer is determined by the number of significant figures
c. when adding, the answer is determined by the number of decimal places
d. when dividing, the answer is determined by the number of decimal places
e. the number 50,004 has five significant figures

D is incorrect. When dividing, the answer is determined by the number of significant figures.

Answer/// he concludes that the atom particles can be broken due to the paddle wheel being moved by particles coming out of the metal;

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m