1. A 115 V source of emf is attached to a heating element which is a coil of nichrome wire (p = 100x10-8 Q-m) of cross-section 1.20 square mm. What must be the length of the wire if the resistive power loss is equal to 700 watts? A certain transistor in an amplifier has 0.0008 A passing through it when 6 V is applied. What is the power dissipated by the transistor? Refer to Figure 1, The value of R in the circuit shown is R X, = 4Q .'.\\',',{.:z';?\\:';' TI 20A 100V Figure 1 Power consumed in the circuit shown in in Fig. 1 is 5. Calculate the normality of a solution of 4.202 grams of HNO3 in 600 mL of solution. H = 1; N = 14; O 10. 11. 12. =16 What is the %0 by mass of 5.0 grams of H20? H = 1 g/mol ; O = 16 g/mol What is the molality of a solution that contains 128 g of CH30H in 108 g of water? C=12 ; H=1; O=16 The density of an aqueous solution containing 12.50 grams K2S0O4 in 100g solution is 1.083 g/mL. Calculate the concentration of this solution in terms of %K2S04, and mole fraction of solvent. K2SO4 = 174 ; H20=18 An aerosol can contain 400.0 ml of compressed gas at 5.2 atm pressure. When the gas is sprayed into a large plastic bag, the bag inflates to a volume of 2.14 L. What is the pressure of gas inside the plastic bag? A 0.1014-g sample of purified glucose was burned in a C-H combustion train to produce 0.1486 g of CO2 and 0.0609 g of H20. An elemental analysis showed that glucose contains only carbon, hydrogen, and oxygen. If the glucose weighs 180 amu, what is the molecular formula of glucose? C=12;H=1: 0 =16 What is the simplest formula of a compound that is composed of 72.4% iron (MW = 55.8 g/mol) and 27.6% oxygen (MW = 16 g/mol) by weight? How many atoms are there in 9.0 grams of silver (MW = 107.87 g/mol)