Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.
A mole is defined to be like particales of a substance
Answer:
B
Explanation:
If you are comparing an amount you are trying to find the quantity or the total of something or the size therefore answer B is the right answer
Answer: Thus 8.41 g was the mass of the original sample
Explanation:
To calculate the moles :
According to stoichiometry :
As 3 moles of 
are produced by = 2 moles of 
Thus 0.103 moles of are produced by =
of
Mass of 
Thus 8.41 g was the mass of the original sample.
believe the answer is c. A and D are just mixing solutions. B is a change in state not chemicals. And E doesn't change the compounds
