2. What must be Final temperature of 200 g of water if it was heated from 30 degree Celsius and absorbed 400 Joules of energy?

answer is a

explanation:

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 your not at all which answer i've seen you do this on another question!