A 15 g ice sample at -5°C is heated to water at 100°C. Calculate the ampount of heat needed. Specific heat of water and ice are 4.184 J/g °C and 2.108 J/g °C respectively. And heat of fusion is 6.01 kJ/mol

List four observations that indicate that a chemical reaction may be taking place

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?