Question

What is the mass of 3.50×10^26 atoms of copper

Answer 1

The atomic mass of Cu is 63.546 atomic mass units(A.M.U)
So,
mass of 3.5×10^26 atoms of Cu
=63.546×3.5×10^26
= 222.411×10^26 A.M.U
=222.411×10^26×1.66×10^(-24) gram
= 369.20226×10^2 gram Ans!!!!

Answer 2

gftyrytyty

Step-by-step explanation:

According to Avogadro's number, in 1 mole of a substance there are
`6.022 * 10^(23)` atoms and mass of copper is 63.55 g.

Hence, in
`3.50 * 10^(26)` atoms the mass of copper will be calculated as follows.

`6.022 * 10^(23)` = 63.55 g

Mass in
`3.50 * 10^(26)` atoms =
`(63.55 g)/(6.022 * 10^(23)) * 3.50 * 10^(26)`

=
`36.93 * 10^(3)`

Thus, we can conclude that mass of copper is
`36.93 * 10^(3)` for
`3.50 * 10^(26)` atoms.