B.) 129.9 grams
To find the mass, you need to use the following equation:
Q = mcΔT
In this equation,
> Q = energy (J)
> m = mass (g)
> c = specific heat (J/g°C)
> ΔT = change in temperature (°C)
The specific heat of copper is 0.385 J/g°C. Knowing this, you can plug the given values into the equation and simplify to isolate "m".
Q = mcΔT < Equation
5000 J = m(0.385 J/g°C)(200 °C - 100 °C) < Insert values
5000 J = m(0.385 J/g°C)(100) < Subtract
5000 J = m(38.5) < Multiply 0.385 and 100
129.9 = m < Divide both sides by 38.5
"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."
i think that is the right