Which one of the following substances would be expected to have the highest melting point? 1. Water (h2o) 2. Boron trifluoride (bf3) 3. Sodium fluoride (naf).

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

Kim jong un.yeet jkany leaking in the power plant can directly cause radiation and other bio hazards.brainliest answer pls.

C, small, hard spheres with insignificant volumes

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.