You have a 450.0 mL balloon filled with 0.0184 moles of Helium gas. The volume of the balloon will change, but the pressure of the gas inside will always match the 1.00 atm pressure outside.
If the balloon is kept at a constant 25oC, how many moles of gas must you remove to shrink the
balloon down to 200.0 mL? (

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

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

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?