Question

A substance has twice the number of particles as 12 grams of carbon-12. How many
moles are in the substance?
A)1.5
B)2.5
C)3.0
D)2.0

Answer 1

Answer:

D)2.0

Explanation:

Avogadro’s number represent the number of the constituent particles which are present in one mole of the substance. It is named after scientist Amedeo Avogadro and is denoted by $N_0$.

Also, it is the number of particles in exactly 12.000 g of isotope carbon 12.

Avogadro constant:-

$N_a=6.023\times 10^{23}$

Thus,

Number of particles as 12 grams of carbon-12 constitutes 1 mole

Twice the number of particles as 12 grams of carbon-12 constitutes 1*2 mole

Thus, moles in the substance = 2.0 moles

Answer 2

Answer:

thanks... the answer would be D) 2.0

Explanation:

thank you...

have a great week everyone!