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J1234567890
Registered User Posts: **231** Junior Member

Test is Tuesday morning, start sharing concerns/questions

This discussion has been closed.

## Replies to: June 2017 Chemistry Regents

19New Member22New Member231Junior MemberWe got this in class...200 ways to pass the chemistry regents

625Member625Member231Junior Member625Member1. Ignore any zeros to the left of a number

2. Any non-zero digit is significant.

3. Any zero between two non-zero digits is significant

4. Any zero after a digit after a decimal point is significant.

Examples:

321 has 3 sig figs

33000000000 has 2 sig figs (since it is just 3.3*10^10)

4002000 has 4 sig figs (4.002*10^6)

.00000002 has 1 sig fig (2*10^-8)

.30000 has 5 sig figs (since the zeros after the 3 tell us that we know to 5 decimal places)

.0020 has 2 sig figs (2.0*10^.3)

When adding, subtracting, multiplying, dividing, etc. numbers with sig figs, you can only be as accurate as your lesst accurate number:

2.00g*.003L is only reported to 1 sig fig since 2.00 has 3 but .003 has only 1.

625Member231Junior Member625Member14New Member231Junior Member625Member16New Member231Junior Member