Water exists as a solid, liquid, and gas on Earth. It is the only substance that naturally exists in all three states within the relatively small range of air temperatures and pressures found at the Earth's surface. How is this property of water central to the planet's dynamics? 1.By changing states, water can evaporate and transpire into the atmosphere. 2.By changing states, water can condense and travel from the atmosphere to Earth's surface. 3.By changing states, water can fall as precipitation that and cause erosion and weathering of Earth's surface. A. 1 only B. 1 and 2 C. 2 and 3 D.1,2 and 3

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

The p sub shell can hold up to 8 electrons in an atom. true or false?

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