akaylatatenbach
akaylatatenbach
31-08-2016
Chemistry
contestada
How many atoms is 50 g of He?
Respuesta :
Willchemistry
Willchemistry
01-09-2016
Atomic
mass He = 4.002 u.m.a
4.002 g --------------- 6.02x10
²³ atoms
50 g ------------------ ? atoms
50 x ( 6.02x10²³) / 4.002
= 3.01x10²⁵ / 4.002
=
7.52x10²⁴ atoms of He
Answer Link
VER TODAS LAS RESPUESTAS ( 74+ )
Otras preguntas
1. How many chromosomes are in each cell at the start of the second meiotic division? 2. Are the paired strands that comprise each chromosome at the start of th
On an airplane, there are two seats on the left side in each row and three seats on the right side. There are 30 seats on the right side of the plane.
4.5 3 5 х Find the length of x
If a srna is bound to the ribosome binding sequence of a mrna coding for an enzyme in a bacteria, what effect will this have on the amount of enzyme in this cel
In the video, you can see that when two hydrogen atoms approach one another, a covalent bond is formed due to the overlap of the 1s orbital of each hydrogen ato
How many bags of concrete do i need for a 10x10 slab.
Are the ratios 16:8 and 2:1 equivalent?
If a club has 20 members and 4 officers how many choices are there for secretary A. 20 B. 18 C.19 note: The secretary is the third officer to be elected.
what is the value of x22x+-15=100
Given that ABC ~ DEC, find the value of x.
