I would say B... ultraviolet rays cause sun burns
Answer:
ummm is the language urdu?????
Answer:
the mass percentage of water of crystallization in washing soda is 62.9 %.
Explanation:
Answer: 7.8 moles of NaCl result from the complete reaction of 3.9 mol of 
Explanation:
To calculate the moles :

As
is the excess reagent,
is the limiting reagent as it limits the formation of product.
According to stoichiometry :
1 mole of
gives = 2 moles of 
Thus 3.9 moles of
will give=
of 
7.8 moles of NaCl result from the complete reaction of 3.9 mol of 
Chemical nomenclature, replete as it is withcompounds with complex names, is arepository for some very peculiar and sometimes startling names. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and Physics (a fundamental resource) will reveal not just the whimsical work of chemists, but the sometimes peculiar compound names that occur as the consequence of simple juxtaposition. Some names derive legitimately from their chemical makeup, from the geographic region where they may be found, the plant or animal species from which they are isolated or the name of the discoverer.