Honors Fall Final 2024 Extension

Front

What are significant digits?

Back

Significant digits (or significant figures) are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How many significant digits are in the number 90,000.00?

Back

7 significant digits.

Front

How many significant digits are in the number 1500 mL?

Back

2 significant digits.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (in grams per mole).

Front

What is the molar mass of Na2SO4?

Back

The molar mass of Na2SO4 (Sodium Sulfate) is approximately 142.04 g/mol.

Front

How many significant digits are in the number 0.0002?

Back

1 significant digit.

Front

How many significant digits are in the number 9.80?

Back

3 significant digits.

Front

What is the significance of trailing zeros in a decimal number?

Back

Trailing zeros in a decimal number are significant because they indicate precision in measurement.

Front

What is the rule for counting significant digits in whole numbers?

Back

In whole numbers, only non-zero digits are significant. Leading zeros are not significant.

Front

What is the rule for counting significant digits in decimal numbers?

Back

In decimal numbers, all digits after the first non-zero digit are significant, including zeros.