HURRY POR FAVOR Suppose cobalt-60 undergoes a type of radioactive decay that does not
change the identity of the isotope. Which type of decay did the isotope
undergo?
O A. Gamma
B. Delta
C. Beta
D. Alpha

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.