Which has more atoms, 6.0 g of silicon (Si:28) or 6.0 of iron (Fe:56)?
Use Avogadro's number as 6.0 x1023

 6.0 g of silicon has more atoms

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

To calculate the moles, we use the equation:

a)

1 mole of Si contains = atoms

0.21 moles of Si contains = atoms

b)

1 mole of Fe contains = atoms

0.11 moles of Fe contains = atoms

Thus 6.0 g of silicon has more atoms

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.