Go to the screen "mars mission landing sites," and and select opportunity landing site (2004). explore all five zoom levels offered, making sure to read the captions at the tops of the screens. based on the information provided, why was the landing site, called meridiani planum, chosen for the opportunity mission? a. the region was already known to have minerals likely to have formed in liquid water. b. the region was in the only part of mars that had not yet been explored. c. the region is near the martian equator, which makes landing easier. d. the region was already known to have very small rocks called "blueberries" that likely formed in liquid water. e. the region has very low elevation, and therefore might once have been in an ancient ocean.

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?