How many moles of solid naf would have to be added to 1. 0 l of 0. 286 m hf solution to achieve a buffer of ph 3. 78? assume there is no volume change. Ka for hf = 7. 2 × 10 –4.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

answer: i dont know the answer but this might

explanation:

l