A cobalt block was heated in a calorimeter to increase its temperature by 41.5 °C. The energy produced by the experiment was 1,850 J. What was the mass of the cobalt block? Specific Heat (CCo =0.117 J/g ° C)

A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat  capacity of 3024 J/°C. The temperature increases by  1.126°C. Calculate the heat given off by the burning  Mg, in kJ/g and in kJ/mol.

Can balloons hold more air or more water before bursting? A student purchased a large bag of 12-inch balloons. He randomly selected 10 balloons from the bag and then randomly assigned half of them to be filled with air until bursting and the other half to be filled with water until bursting. He used devices to measure the amount of air and water was dispensed until the balloons burst. Here are the data

If 2.57 mol of ethane (Call) undergo com- bustion according to the unbalanced equation C2H6 +02 CO₂+H₂O, how many moles of O2 is required? Answer in units of mol.

A hand truck is used to move two kegs, each of a mass 32 kg. Assume g=9.8 m.s²² and neglect the weight of the hand truck. a=35 deg. 80 mm 350 mm 500 mm •G2 B 300 mm A P Determine the corresponding reaction at each of the two wheels in N.

63% E. 108 cubic centimeters Question #2: A store owner is stacking toasters that come in boxes measuring 1 cubic foot each, as shown below. What is the volume, in cubic feet, of the rectangular prism when it is full? Pause

Area = 0.3745 z=? OK

1. 11 yd SA = %3D

Do the following on paper, scan or photograph your work, and submit it. You have a room that is 4 m long, 7 m wide, and has a ceiling height of 3 m. The floor is hardwood,  = .15 at 500 Hz. The walls are gypsum wallboard (GWB),  = .30 at 500 Hz. The ceiling is acoustic ceiling tile (ACT),  = .95 at 500 Hz. What is the total absorption, A, in this room at 500 Hz?