19. An unknown solid weighing 20 g is placed in a 2 L flask from which the air has been evacuated. After heating the flask to 1500C, the substance completely turned into a gas, and the pressure in the flask became equal to 0.5065 MPa. Find the relative molecular weight of the substance.
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
No feedback yet