1. State the number of significant figures in each of the italicized quantities: (a) One fluidounce equals 29.57 milliliters. (b) One liter equals 1000 milliliters. (c) One inch equals 2.54 centimeters. (d) The chemical costs 1.05 per pound. (e) One gram equals 1,000,000 micrograms. (f) One microgram equals 0.001 milligram.

## Step 1<br />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 any trailing zeros in the decimal portion.<br /><br />## Step 2<br />(a) 29.57 - This number has 5 significant figures (all non-zero digits and zeros between them are significant).<br />(b) 1000 - This number has 1 significant figure (leading zeros are not significant, but zeros between non-zero digits are).<br />(c) 2.54 - This number has 3 significant figures (all non-zero digits and zeros between them are significant).<br />(d) 1.05 - This number has 3 significant figures (all non-zero digits and zeros between them are significant).<br />(e) 1,000,000 - This number has 1 significant figure (leading zeros are not significant, but zeros between non-zero digits are).<br />(f) 0.001 - This number has 1 significant figure (leading zeros are not significant, but zeros between non-zero digits are).