A cape is designed for Lady Gaga's covered with 4280 sequins. If a sequin has a volume of 0.0229 cm3 and the sequins have a density of 41.1 g/cm3, calculate

Question

(a) the mass in kg of sequins on Lady Gaga's cape.

(b) the mass in lb of sequins on Lady Gaga's cape.

Answer 1

0.0229 cm2 / sequin x 4280 sequin = 98.012 cm3

98,012 cm3 x 41.1 g / cm3 = 4,028 g x 1 kg / 1000 g = 4.03 kg (3 sig. figs.)

1 lb = 454 g

4028 g x 1 lb / 454 g = 8.87 lbs