A scientist has a piece of lead in a beaker. The piece of lead has a…

A scientist has a piece of lead in a beaker. The piece of lead has a mass of 45. lug. What is the mass of the lead expressed in kg? O 4.51 x 10-8 kg 4.51 x 104 kg none of these choices O 4.51 x 10-2 kg O 4.51 x 1010 kg O 4.51 x 10-5 kg