Which of the following statements about balanced chemical equations is correct? A.
The products must contain the same numbers and types of atoms as the reactants.

B.
The products must contain the same arrangement of atoms as found in the reactants.

C.
The products must contain the same numbers but not the same types of atoms as the reactants.

D.
The products must contain the same types but not the same numbers of atoms as the reactants.

A.

The products must contain the same numbers and types of atoms as the reactants.

Explanation: I think this

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

more infor would

a lot