the SI unit of mass is kilogram
Answer: 20 mg Te-99 remains after 12 hours.
Explanation: N(t) = N(0)*(1/2)^(t/t1/2)
N(t) = (80 mg)*(0.5)^(12/6)
N(t) = 20 mg remains after 12 hours
Answer:
Here is the link
Explanation:
A poem about the scientific method
2AgNO3 + CaCl2 ----> 2AgCl + Ca(NO3)2