6) When 5.00 grams of ammonium chloride, NH. Cl, is added to 100 ml of water the temperature drops by 4.2°C how much would the temperature change if 10.0 grams is added to 1000 ml. of water?
7) 2.71 grams of a fuel was burned releasing 4.10 k) of energy into some amount of water. The water
changed from 22.2 °C to 53.1 °C. How much water was heated?
8) A 125.0 gram sample of a metal, X, was heated to 400.0 °C and placed onto a 1.000 kg block of ice at
0.0°C. Some of the ice melted, but after the metal and ice reached thermal equilibrium the temperature
of the metal, ice and liquid water remained at 0.0°C. If the specific heat of the metal was 0.245 1/g°C
calculate the heat lost by the metal?

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?