Under what circumstances does a product or work lose its original copyright protection?

Copyright is a form intellectual property protection. This serves to protect the original works of authorship including literary, musical, and dramatic works. This differs to patent since copyright is for artistic works and patent is for inventions.

A copyright lifespan is equivalent to the life of the author plus 70 years. The only circumstance in which the author loses the copyright protection is when the product is sold to another person/company.

The author sells the work to another person/company

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

indium, and thallium have three electrons i think