Answer: Lithium—7 is more abundant with 94.1%
Explanation:Please see attachment for explanation
Answer:
C. Scientific laws describe phenomena that can be observed in nature
Explanation:
Answer:
39 × 10²³
Explanation:
142.5/22 = 6.47 mole
Then n = n of molecules / nA = 39.01 × 10²³
Answer:
L=7.0125*10^-5
Explanation:
LET
Length of polyethene chain= L
Molecular weight OF polyethene= MW
Molecular weight of monomer =mw
Monomer length= l
L=(MW/mw) *l
L= (28.05g/mol10^6gmol-1) * 2.5
L=70.125*10^-6
L=7.0125*10^-5
Hence, the length will be L=7.0125*10^-5
.
The answer is B as isotopes are different versions of the same chemical element containing the same amount of protons and electrons but different amounts of neutrons.