You are on a road trip through the mountains, and you notice that the cylinder in your car is not experiencing the same ideal expansion as when you originally calculated it at sea level. Rather than experiencing a change in volume of 488 mL as you calculated at sea level, it is experiencing a change in volume of 442 mL while driving through the mountains, with a total of 0.0727 g of gas phase molecules in the cylinder after the combustion reaction. Assuming that your car is still operating at 100% efficiency (as we assumed throughout the discussion problems on Tuesday), what is different now

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m

What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g