How many moles of oxygen atoms are on 4.7x1022 molecules of carbon dioxide? 0.076 mol
0.23 mol
0.038 mol
0.15 mol

0.076

Explanation:

n=4.7×10^22/6.022×10^23

n=0.076mol

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current