A 245.7g sample of metal at 75.2°C was placed in 115.43g water at 22.6°C. The final temperature of the water and metal was 34.6°C. What is the specific heat of the metal? The specific heat of water is 4.18 J/g∙°C.

law of conservation of matter

"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"

2b2t

explanation:

2b2t