3. a) Density is defined as mass per unit volsme. If the standard volume of a penny is 0.40 cm', caleulate the density of the perny after heating. Anvwer should be expressed in g/ cm3. b) The density of some common metals are listed below. Copper=8.96g/cm2Zine=7.14g/cm3Gold=19.32g/cm3 Based on these values, were you successful in transforming the penny into gold? Explain your reasoning. 4. Modern pennies are made of 97.5% zine and 2.5% copper. These pennies have a mass of 2.50g and a volume equal to 0.40cm3 i Use dimensional analysis to calculate the mass of zinc in a penny. ii. Use dimensional analysis to calculate the mass of copper in a penny. iii. If the current value of zinc metal is 1.17S/lb and the current value of copper metal is $2.71/lb calculate the total value of metal in a penny. 3. a) Density is defined as mass per unit volsme. If the standard volume of a penny is 0.40 cm', caleulate the density of the perny after heating. Anvwer should be expressed in g/ cm3. b) The density of some common metals are listed below. Copper=8.96g/cm2Zine=7.14g/cm3Gold=19.32g/cm3 Based on these values, were you successful in transforming the penny into gold? Explain your reasoning. 4. Modern pennies are made of 97.5% zine and 2.5% copper. These pennies have a mass of 2.50g and a volume equal to 0.40cm3 i Use dimensional analysis to calculate the mass of zinc in a penny. ii. Use dimensional analysis to calculate the mass of copper in a penny. iii. If the current value of zinc metal is 1.17S/lb and the current value of copper metal is $2.71/lb calculate the total value of metal in a penny