I don't even know what the instructions mean because I was absent in class for a day. PLEASE ANSWER WITHIN A DAY IF POSSIBLE. I'm gonna have to try and figure it out if not lol. Thanks <3

Of course: ) what’s your name ?

Answer: temperature? i hope this and have a wonderful

Heat of fusion= heat/mass  heat of fusion = 12.03kj/36 g= 0.3342 kj/g or 334.2 j/g

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.