how many significant figures are present in 0.0025

The number 0.00 has 2 significant figures.

Explanation:

• The zeros after the decimal point and after the decimal are significant because they indicate precision.
• The first zero before the decimal point is not significant (it's just a placeholder).
• So, in 0.00 , the two zeros after the decimal are significant.

Summary:

• 0.00 → 2 significant figures.