What Mass Of $14 \mathrm { C }$ , with a Half-Life Of

Multiple Choice

What mass of $14 \mathrm { C }$ , with a half-life of $5730 \mathrm { y }$ , do you need to provide a decay rate of $280.0 \mathrm {~Bq}$ ? The mass of ${ } ^ { 14 } \mathrm { C }$ is $14.00 \mathrm { u }$ , and $1 \mathrm { u } = 1.6605 \times 10 ^ { - 27 } \mathrm {~kg}$ .

A) $5.38 \times 10 ^ { - 19 } \mathrm {~kg}$
B) $1.70 \times 10 ^ { - 12 } \mathrm {~kg}$
C) $8.68 \times 10 ^ { - 13 } \mathrm {~kg}$
D) $3.84 \times 10 ^ { - 20 } \mathrm {~kg}$