Heated blocks of iron used to be used to warm beds. a 2058.4 g brick of iron would be heated to 370.0 °c and placed into a box
at the end of the bed. how many joules of energy would be released as it cooled to 25 °c overnight? (specific heat of fe = 0.449
j/g °c)

idk i’m struggling too

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

answersilicon (si); oxygen (o);