chem 131 complete exam questions and correct detailed answers

A hot metal placed into a cup of cool water. The initial temperature of the water is 20 C. After several minutes, the temperature of the water stabilizes, and you notes that the temperature of the water increased by 10 C. What is the final temperature? - correct answers 30 C A chemical reaction is carried out in a sealed container at constant external pressure of 4atm. The intial volume of the container is 7L and the final volume is 2L. Determine the value of w - correct answers 20 L atm Which of the following molecules have hydrogen bonding intermolecular forces? - correct answers CH3COOH Which of the following gases has the highest average at 25 C? - correct answers NH3 For the reaction 4 Al(s)+3O2 (g) - 2Al2O3 (s)= -3344 kJ. What is the standard enthalpy of formation of aluminum oxide? - correct answers -1672 kJ If CO(g) and N2 (g) are allowed to effuse enough through a porus membrane under identical conditions, the rate of effusion for N2 will be ______ CO - correct answers about equal to A central atom with steric number (SN) of five with one lone pair has what geometry? - correct answers see-saw The value for specific heat capacity is - correct answers always positive What is/are the bond angle of a tetrahedral molecule - correct answers 109.5 What is the bond order of a species that has two electrons in the o molecular orbital, two electrons in the o molecular orbital, and six electrons in the pi molecular orbital? - correct answers 3 The meteorologist of Baldur's Gate records the barometric pressure for the city as being 29.62 inches of mercury. What is the pressure in atm? - correct answers 0.99 atm Which of the following bonds is polar? - correct answers O---H What is the hybridization of a trigonal pyramidal molecule - correct answers sp3 For a gas, which set of variables are inversely proportional to each other - correct answers P,V A paramagnetic species has _______ electrons and is ______ by a magnetic field - correct answers unpaired, attra