A 18. The number of seconds in a 40-hour work week can be calculated as follows: 60 s
1 min
a. 60 S x
60 s
1 min
b.1sx
60 s
1 h
60 min
40 h
60 min
60 min
c. 40 hx
х
1 h
60 min
d. 40 h x
40 h
1 min
60 s
60 min

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The gas would begin to expand, and eventually the can would burst or explode.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na