K12 4.03 Heat Lab (PLEASE HELP) [30 POINTS] (REAL ANSWERS, please)

I can't find the enthalpy of fusion for one of my trials. Info I have: 3,160 heat absorbed and 55g of ice melted (410g for the calorimeter w/ nothing -- 452g in the calorimeter w/ water -- 500g in the calorimeter w/ ice and water -- then I poured out the water after stirring and got 445g for the remaining ice). Also, I'm not sure what it means when it says I need to find the percent error from the accepted enthalpy of fusion of water of 334 J/g?

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet

What is the oxidation state of an individual bromine atom in nabro3?

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms