Which of the following mass measurements is the smallest? a. 78 kg b. 78 mg c....

Question

Question

Which of the following mass measurements is the smallest?
a. 78 kg
b. 78 mg
c. 78 pg
d. 78 fg
e. 78 ng

science chemistry

Answer 1

Answer #1

(A)1 Kg=1000g

78 Kg=78*1000=78000g

(B)1 mg=0.001g

78mg=78*0.001g=0.078g

(C)1pg=1e-12g

78pg=78*(1e-12)=(7.8e-11)g=10.202g

(D)1fg=(1e-15)g

78fg=78*(1e-15)=7.800000000000001e-14=7.202g

(E)1ng=1e-9g

78ng=78*(1e-9)=7.8e-8=21.202-9=12.202g

so,(B) has less mass measurement.Hence (B) is the correct answer

Answer 2

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