PL ANSWER how does a balanced chemical equation represent the conservation of matter in a chemical reaction?

a. the type of matter in the products is different from the type of matter in the reactants.

b. there are more atoms in the reactants than in the products.

c. there are fewer atoms in the reactants than in the products.

d. the number of atoms of each element in the reactants equals the number of atoms of each element in the products.

"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"

it takes on an electronical energy

the answer is d. 74.02