WILL GIVE BRAINLIEST FOR THE RIGHT ANSWER!!
1 answer:
Answer:
19 gram
Step-by-step explanation:
Formula of mass left after ionising: 
where M is original mass and n is half lives.
Using the equation:
→ 18.75
Therefore, 18.75 g left after ionising.
∵ If rounded to nearest gram then 19 gram.
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