Chadwick discovered the existence of neutrons which accounts for isotopy.
Isotopes exists because atoms of the same element may differ in the number of neutrons present in each one. This phenomenon is called isotopy.
Chadwick discovered the existence of isotopes by bombarding Beryllium with alpha particles obtained from Polonium decay.
The discovery of the existence of neutrons led us to the a better understanding of isotopes since isotopes differ only in the number of neutrons present.
Learn more: brainly.com/question/13214440
Answer:
1.67x10^23 atoms
Explanation:
From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 atoms.
This means that 1mole of gold contains 6.02x10^23 atoms.
1 mole of gold = 197g
197g of gold contains 6.02x10^23 atoms.
Therefore, 54.5g of gold will contain = (54.5 x 6.02x10^23) /197 = 1.67x10^23 atoms
P1V1=P2V2
SO
2X0.140=P2X4.50
P2=2X0.140/4.50
P2=0.0622 atm
To solve this question you need to calculate the number of the gas molecule. The calculation would be:
PV=nRT
n=PV/RT
n= 1 atm * 40 L/ (0.082 L atm mol-1K-<span>1 * 298.15K)
</span>n= 1.636 moles
The volume at bottom of the lake would be:
PV=nRT
V= nRT/P
V= (1.636 mol * 277.15K* 0.082 L atm mol-1K-1 )/ 11 atm= <span>3.38 L</span>
