Answer:
2.08 moles (3 s.f.)
Explanation:
number of moles
= number of atoms ÷ Avogadro's constant
Avogadro's constant= 6.022 ×10²³
Thus, number of moles
= 1.25×10²⁴ ÷ (6.022 ×10²³)
= 2.08 moles (3 s.f.)
Methane CH4
ethane C2H6
propane C3H8
Butane C4H10
pentane C5H12
Answer: A wavelenghth is the<u> distance between successive crests</u> of one <u>wave</u>.