Chemistry: Significant Figures

What is the first rule of significant figures

Every nonzero digit in a reported measurement is assumed to be significant

What is the 2nd rule of significant figures

Zeros appearing between nonzero digits are significant

What is the 3rd rule of significant figures.

Left most zeros in front of nonzero digits aren’t significant.

What is the 4th rule of significant figures

Zeros at the end of a number and to the right of a decimal point are always significant

What is the 5th rule of significant figures

Zeros at the rig end of a measurement that lie to the left of an understood decimal point are not significant.

What is the exception to rule 5.

If there is a written decimal the zeros to the left of a measurement become significant. Like 300.

What is the amount of significant figures if its an exact counted value

Unlimited

What is the amount of significant figures if its a defined quantities found in measurements.

Unlimited

What is the rule for adding and subtracting Sigfigs

It should be round to the same number of least decimal points.

What is the rule for multiplication and division sigfigs

Round the answer to the same number of sigfigs of the least.