<span>To calculate the area of a sheet of paper in square centimeters, one must first transform the paper dimensions into centimeters. This can be done by multiplying 8.5 by 2.54 and 6.5 by 2.54. The resultant paper dimensions are 21.59cm by 16.51cm. The area is then determined by multiplying these dimensions, yielding an area of 356.4509cm2</span>
Unused chemicals should never be returned to their original containers, as this could lead to contamination. The leftover chemicals should be disposed of in the appropriate waste bin. If there is uncertainty about the procedure, consult your teacher.
The temperature difference after 3 hours is 5.16 K. Given that the moles of O₂ inhaled rate at 0.02 mole/min, which converts to 1.2 mole/hour, we know the average heat released during metabolism is 7.2 kJ/h·kg. Therefore, the amount of heat generated within 3 hours will be 7.2 kJ/h·kg multiplied by 3 hours, giving a result of 21.6 kJ/kg, or 21.6 x 10³ J/kg. Applying the formula Qp = Cp x ΔT, and taking the body's heat capacity to be 4.18 J/g·K, we find ΔT = 5.16 K.
