Aballoon filled with 1.0 mol of argon is placed into a large chamber filled with air at 300 k and 1.0 atm. first, a vacuum pump attached to the chamber reduces the pressure to 0.1 atm. the vacuum pump is turned off, and the chamber is sealed. second, the chamber is heated to 400 k (the gas inside the chamber remains in thermodynamic equilibrium with the chamber walls). cp, m (ar)=20.79 j mol-1 k-1 calculate for this combined process, where the system is defined as the gas inside the balloon, which behaves as a perfect gas under these pressure conditions. (hint: choose any path you want; e. g. the second step could be broken down into heating from 300 to 400 k followed by irreversible isothermal expansion from 0.1 atm to the final pressure.)

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

1. list three scientific reasons cockroaches may fly.