10 Which othetho these molecules or ions has a violation of the octet rule other

Question

10 Which othetho these molecules or ions has a violation of the octet rule other than H) a Co b. H2o (e) PC15 d. Br2 NH3 11. Calculate the mass ot vater in grams that can be heated from o c to 15 C by of from 100 °c to 25 oC. the mount of heat evolved from cooling 1.00 kg of water com 00 12. Thirty grams of ice at 0.0 °C is added to a Styrofoam cup containing 150 mL of water at 65 oC. After the ice has melted the temperature of the water in the cup is 40 °C. What is the heat of fusion of ice in this experiment?

Explanation / Answer

Qcold = mass of water * Cp water* (Tf-Ti)

Qcold = mass of water * 4.184*(15-0)

Qcold = mass of water *62.76

now.. Get Qcold from

Qhot = m*C(Tf-T)

Qhot = 1000*4.184*(25-100) = -313800

Qcold = -Qhot

Qcold = --313800 = 313800

then

Qcold = mass of water *62.76

313800= mass of water *62.76

mass of water = 313800/62.76

mass of water = 5000 g = 5 kg

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