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Question 14 (8 points) A certain radioactive substance

/in /by

Question 14 (8 points) A certain radioactive substance has a half-life
of 1 hour. If you start with a 1,224 g sample at noon, how much is left at 3:00 PM?
Answer in grams in integers

Question 15 (4 points)
What is the formula for the ionic compound formed by these ions? Al3+ and S2−
Question 15 options:
Multiple Choice

1.Al2S3

2.Al3S3

3.Al2S3

4.Al2S4

 
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