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Question 1
Calculate rate constant k for a first order reaction with a half-life of 37.5 min.
O a
Ob
ос
1.33 x 10-2 min-1
9.24 x 10-3 min-1
26.0 min-1
1.85 x 10-2 min-1
154 x 10-4 min-1
O
e

Density because it’s holyyy

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium