How many grams of water

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An beaker of water (125 mL) at 15 OC was frozen to ice at 0 OC. Calculate the heat loss from the water during this phase change.

4.) A piece of ice at 0 OC and weighting 35 g is added to a beaker of water at 18.0 OC. All the ice melts, and the temperature of the water in the beaker decreases to 12.0 OC.

How many grams of water were in the beaker (i.e., the initial volume of water in beaker)?
What mass of water will change it’s temperature by 3 degrees C when 525 J of heat is added to it?

2.) How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C?
If the half-life of a specific radioisotope is 7.2 days, how much activity would remain after 36 days?