A silver cube with an edge length of 2.26 cm and a gold
cube with an edge length of 2.70 cm are both heated to
89.6 °C and placed in 115.0 mL of water at 20.0°C.
What is the final temperature of the water when thermal
equilibrium is reached?
Substance
gold
silver
water
Specific heat (J/g.°C)
0.1256
0.2386
4.184
Density (g/cm)
19.3
10.5
1.00

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

Dsolubility let me know if you have any other questions for chemistry

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy