A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds Select one:
a)2,700 seconds
b)16,200 seconds
c)270 seconds
d)6,480 seconds

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

catya that's not even a b or c

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: