Originally 2.00 mol of gas are at STP. If the temperature changes to 47.0°C and the pressure decreases to half of what it was, how many liters do the two moles now occupy? (1 atm = 101 kPa, R = 8.31 J/mol ? K)
What will be an ideal response?
105 L
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To have a negative ion, you must have:
A) taken away a proton from the nucleus. B) added a positron to the nucleus. C) added a positron to the outer electron shell. D) added an electron to the outer electron shell. E) None of these; only positive ions can exist in nature.
During a hockey game, a puck is given an initial speed of 10 m/s. It slides 50 m on the horizontal ice before it stops due to friction. What is the coefficient of kinetic friction between the puck and the ice?
A) 0.090 B) 0.10 C) 0.11 D) 0.12
Open clusters are found in the ________ of our Milky Way Galaxy
Fill in the blank(s) with correct word
A 2000 kg car is traveling at 15.0 m/s down a long mountain grade of 2.0%. The mountain road is 5.0 km long. The heat generated at the brakes due to friction heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg 
What is the increase in the temperature of the brakes?
A. 43 
B. 54
C. 83
D. 95
E. 117