cernayanci
cernayanci
21-11-2019
Chemistry
contestada
How many atoms are in 0.5 g Helium (He)?
Respuesta :
gaalloo
gaalloo
21-11-2019
Well first you need to know the molar mass of He which is 4.0026g/mol and Avogadro’s number which is 6.022*10^23 (units). So the equation is
0.5gHe * mol/4.0026He *(6.022*10^23)He atoms/mol
=7.5*10^22 He atoms
Round to only one sig fig because 0.5g only has one
Final answer: 8*10^22 He atoms
Answer Link
VER TODAS LAS RESPUESTAS ( 44+ )
Otras preguntas
I need serious help with #5 (the question is attached!!!) AM I RIGHT? Please give honest answers and don’t just guess for points...
A population is in Hardy-Weinberg Equilibrium with respect to a gene, "yellow," which has 2 alleles, y and Y. Y, the wild type allele, is completely dominant to
nosotros era eras éramos erais eran
What is y =2/3x+ 4 written in standard form?
If your company does not have a manual that describes all the major product warranties, you should: A. Avoid talking about warranties with your customers B. C
MNOP is a trapezoid with median QR find X
To distinguish advertising, which typically is conveyed via print, TV, radio, the Internet, etc., from person-to-person forms of communication, including person
Murdock wants to get to his sister’s new house, which he knows is north of where he is right now. Stranded without a map or a telephone, he decides to keep driv
what is the correct term of the age of reptiles
The most populous cities in the Northeast are _____.
