9. KrF2 reacts with Au to give [KrF][AUF6]. Which of the following best describes the role of KrF2 in this reaction? A. KFF2 acts only as a reducing agent. B. KrF2 acts only as an oxidising agent. C. KrF2 acts as a fluoride donor and a reducing agent. D. KrF2 acts as a fluoride donor and an oxidising agent.

AHMAD, ASHNA 5 of 35 1 4. 6. 7 A student has two rubber balls of different masses to perform an experiment. Which experiment can the student do to objects? O Roll the rubber balls on thick carpet, and observe if either ball produces a spark. O Move a magnet near each rubber ball, and observe if either ball is attracted to the magnet. O Place the rubber balls ona rough surface, apply a small push, and record the time for each ball to move 30 cm. O Drop the rubber balls at the same time from 5 m, and record the time for each ball to hit the ground. P Type here to search 5.

25 1. T The specific heat of water is 4.18 J-g-¹ K-¹. How much heat is required to raise the temperature of 500 g of water from 20 °C to the boiling point (100 °C)? What is the molar heat capacity of water? Specific heat of 11₂0= 4₁185.5-1-14-1 motor mass of waver: 18,001g/mol mas of water = 5003 a. 5 D HRAMCAT Hear = 500g (thit 3). 2014 Initial Temp: 20%= 2931 molar hear capacity & spresse head capacting of w Anal Temp: 100% = 3731 Hear =? Molar heat coperty? Hent = 1672003 Hear = 167.23 = 4.182 * 75,23/10.19 2. In studying the energy generated by a person, you may view the person roughly as a constant pressure calorimeter using sugar (i.e., sucrose, C12H22O11) to generate power. The reaction of table sugar in a calorimeter is given by C. Q b. Calculate the enthalpy of combustion per mole of sugar utilization. Does the result of your calculation make sense? C12H22O11(s)+120₂(g) →12CO₂(g)+11H₂O+heat. →give the magnitudo (no sign is recessure) What is the heat released by consuming one…

2.50kcal to J