Verified answer

Answer:

Atomic mass of the element =Mass of one atom×6.02×10²³

=6.644×10-²³

×6.02×10²³

=40g

No. of gram atoms =

No.ofgram

Mass of the element in gram

= 40000/40

=1000 gram atoms

below answer is wrong by the way this is right.

mark me as brianliest.

Answer:

Mass of 1 mole Y atoms= mass of 1 atom × Avogadro constant

➾ 6.644 × 10-23 × 6.022×1023

➾ 40 g

♦ The atomic mass of Y = 40

= Mass of Y/Atmoic mass

= 40*1000/40

= 40