Which of these careers require working in dangerous situations, with hazardous chemicals, and/or taking risks?

prison guard
accountant
explosives engineer
waiter

explosive engineers and prison guards

Explanation:

All the rest involve serving people in different ways, not dealing with chemical. The word explosive should have been your first clue.

Prison guards can deal with dangerous inmates and be put in tough situations.

- Hope this helped! Let me know if you need a further explanation.

One: looks to be correct for both answers. Certainly the first one is. The second depends on your other choices. But military use is one.

Two: is correct. Pd has (in this case) an atomic mass of 114 and its number is 46

Three: Even with my slop numbers, 4.98  is the answer (although I get 4.99 but again, my numbers are pretty sloppy).

Four: Slop numbers say 78.3, but 78 is the right answer.

Five: Slop numbers agree with Al2S3. I think that's D

They are all correct. Very Fine Work.