Answer:
light with a high enough intensity
Explanation:
E = mc^2
E = 8.90 * 10^12 Joules
c = 3 * 10^8 m/s
m = ????
8.90 * 10^12 = m * (3 * 10^8)^2
8.90 * 10^12 = m * 9 * 10^16
9.889 * 10^-4 kg = m <<<<< answer
All the elements in one group have the same number of valence electrons.
M(H2SO4)=n*M=4.75*98=465.5g