The formula for hydrate indicates the number of water molecules that are attached to each formula unit of the compound. Forexample, nickel (II) sulfate hexahydrate is a green/blue solid that has six water molecules included in the crystal foreach Ni2+and each SO42-ion.Many common minerals are
<h3>What is a hydrate ?</h3>
Any compound containing water in the form of H2O molecules, usually, but not always, with a definite content of water by weight. 
- The best-known hydrates are crystalline solids that lose their fundamental structures upon removal of the bound water.
- Hydrates are formed when water and light end natural gases come into contact at certain temperature and pressure conditions
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Answer:
The lungs are the organs most affected by coronavirus
Los pulmones son los órganos más afectados por coronavirus 
Explanation:
 
        
             
        
        
        
i beleive that is the respiratory system but ill double check in  a m inute
alright heres all your answers for that test question 1 true
question 2 oxygen question 3 carbon dioxide question 4 true question 5 alvoei question 6 diaphram question 7 respitory system  the last 3 are all true i hope i helped
 
        
             
        
        
        
Answer:
its created when the bacteria reduces the effectiveness of a drug and that drug no longer has a strong effect on it.
Explanation:
it is very bad because they can survive and multiply much more and since they are resistant we cannot get rid of them so medicine wont work against them.