Question

If 125 g of ice at 0.0°C is added to 1.95 L of water at 90 °C, what is the final temperature of the mixture?

Answer 1

From your previous post.
q1 to melt ice + q2 to heat melted ice to final T + q3 to cool 90 C water to final T = 0

q1 to melt ice is that mass ice x heat fusion. (That change the phase)
q2 to raise T of melted ice is that mass H2O x specific heat H2O x (Tfinal-Tinitial). (That within a phase)
q3 to cool the 90 C H2O is that mass x specific heat H2O x (Tfinal-Tinitial)(another within a phase)

And if you add