Question

How many atoms are in 93.5 grams of calcium
a.) 93.5 atoms
b.) 187 atoms
c.) 2.33 × 10⁰ atoms
d.) 5.63 × 10²⁵ atoms
e.) 1.40 × 10²⁴ atoms

Answer 1

Explanation:

Weight of calcium =20 g

Atomic weight of calcium =40 g/g atom

Number of gram atoms of calcium =

40 g/gatom

20 g

=0.5 gram atoms.

The Avogadro's number is 6.023×10

23

atoms/ g atom

The number of atoms of calcium =0.5 gram atoms ×6.023×10

23

atoms/ g atom

=3.01×10

23

atoms

Answer 2

Answer:

Explanation:

e.