12- When a piece of glass was heated with 630 J of energy, the temperature of the glass increased from 36.5°C to 57.5°C. What is the
mass of this piece of glass? (Cp = 0.84 J/g.°C) show all your work*

Distance and velocity graph

Because a model would make the investigation easier to understand

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

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