How many atoms of k are present in 195.49 grams of k

If you want to create an electrical current, which situation would produce a solution capable of this

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml