You have a pure (24-karat) gold ring with mass Gold has an atomic mass of and an atomic number of 79. (a) How many protons are i n the ring, and what is their total positive charge? (b) If the ring carries no net charge, how many electrons are in it?
1 answer:
Answer:
Explanation:
(a)
Gold has an atomic mass of 197 g/mol means 197 g of gold contains 6.023×10^{-23} atoms.
therefore number of atoms in 17.4 g is
Number of protons in each atom is 79.
therefore Total number of protons is 5.32×10^{22}×79 =4.2×10^24. protons
Their total positive charge is 4.2×10^{24}×1.6×10^{-19) =6.72×10^5 C.
(b)
equal number of protons should be there to neutralize the material therefore number of electrons is 4.2×10^(24.)
You might be interested in
Answer:
change in momentum
20m/s x2=40kg/m
The answer is 12.5 kg because 250N / 20m/s^2 I hope that helped
A. 1.35 is the number in between 1.2 and 1.5.
During the daytime, I have mostly line symmetry. During the night, I often have almost spherical symmetry.
Answer: Acted on by equal forces in opposite direction
Explanation:
Newton's First Law says that every body continue in its state of rest or constant speed on a straight line unless being acted upon by an external force.