dndkns
dndkns
24-05-2014
Chemistry
contestada
How many atoms are there in 90.2 grams of selenium?
Respuesta :
Sabrina211
Sabrina211
25-05-2014
First calculate the moles of selenium by multiplying the mass x molar mass
90.2 × 78.96 = 7122.2 moles
Number of moles multiplied by avogadros number gives number of atoms
7122.2 × 6.022 × 10^{23} = 4.289×10^{27} atoms
Answer Link
VER TODAS LAS RESPUESTAS ( 97+ )
Otras preguntas
5 reasons that cells divide?
please help me A person launches a home-built model rocket straight upinto the air at y = 0 from rest at time t = 0 . (The positive y-direction is upwards). Th
if T (n) =3n-1 what is the 3rd term
What City in France was originally a Greek City state?
5 reasons that cells divide?
2x-8y=6 y=-7- x what are the coordinates
How did Brunelleschi build a dome that would not collapse??
the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.
Balance copper(II)sulfate+ammonium sulfide= copper(II) sulfide + ammonium sulfate
Rachel wants to reduce the size of her photo which factor listed the below would scale down (reduce) the size of her picture the most
