Q1.6CYL - Chemistry (OpenStax)

Question

What is the density of a liquid with a mass of 31.1415 g and a volume of 30.13 cm³?

Step-by-Step Solution

Answer

Density =1.034 (round four significant figures, Three decimal places)

 

Step 1: Calculate the density

It is given that,

Mass of liquid=31.1415g

Volume of liquid=30.13cm³

 

   Density=Mass / Volume

 

           d=31.1415g / 30.13cm³

 

            =1.0335711915 g/cm³

Step 2: Apply the rules of significant figures

All of the digits in measurement, including the uncertain last digit, are called significant figures or significant digits.

Note that zero may be a measured value; for example, if you stand on a scale that shows weight to the nearest pound and it shows "120," then the 1 (hundreds), 2 (tens) and 0 (ones) are all significant (measured) values.

So, rounding off to 4 significant figures, the density will be 1.034 g/cm³