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

the answer would be c

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"