1.

The mass of a piece of paper is 0.02 g and the mass of a solid substance and the piece of paper is 20.036 g. If the volume of the solid is 2.16 cm^3, calculate its density to the proper number of significant digits.

Answer»

`9.27 G CM^(-3)`
`9.3 g cm^(-3)`
`9.267 g cm^(-3)`
`43.24 g cm^(-3)`

Solution :`{:(20.036),(-0.02),(OVERLINE(20.016) ):}`
DENSITY ` = (20.02)/(2.16) = 9.268 " or" 9.27 g cm^(-3)`


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