Answer:
Explanation:
Atomic mass of Nickel = 58.69 g/mol
Mass of 1 mole of nickel atom = 58.69 gm
Now, mass of 1 nickel atom = Gram atomic mass/Avogadro number
=
Now, price of Rhodium =$1500 per troy ounce
Price of nickel in market = 0.577$/oz
No. of rhodium atoms needed to buy 1 nickel atom is
Answer is: number is 0.14303691.
Carbon-13 (¹³C) is a stable isotope of carbon with mass number 13, it has six protons and seven neutrons.
Isotopes are chemical elements with same atomic number, but different mass number (different number of neutrons).
ω(¹³C) = 1.10% ÷ 100%.
ω(¹³C) = 0.0110; abundance of carbon-13 in nature.
m(¹³C) = 13.003355; the atomic mass of carbon-13.
ω(¹³C) · m(¹³C) = 0.0110 · 13.003355.
ω(¹³C) · m(¹³C) = 0.14303691.
Answer:
for the reaction is -198.762 J/K
Explanation:
Standard change in entropy for the system () is given by-
![\Delta S^{0}=[2moles\times S^{0}(NH_{3})_{g}]-[1mole\times S^{0}(N_{2})_{g}]-[3\times S^{0}(H_{2})_{g}]](https://tex.z-dn.net/?f=%5CDelta%20S%5E%7B0%7D%3D%5B2moles%5Ctimes%20S%5E%7B0%7D%28NH_%7B3%7D%29_%7Bg%7D%5D-%5B1mole%5Ctimes%20S%5E%7B0%7D%28N_%7B2%7D%29_%7Bg%7D%5D-%5B3%5Ctimes%20S%5E%7B0%7D%28H_%7B2%7D%29_%7Bg%7D%5D)
where 
represents standard entropy.
Here 
, 
and 
So, ![\Delta S^{0}=[2\times 192.45]-[1\times 191.61]-[3\times 130.684]J/K=-198.762J/K](https://tex.z-dn.net/?f=%5CDelta%20S%5E%7B0%7D%3D%5B2%5Ctimes%20192.45%5D-%5B1%5Ctimes%20191.61%5D-%5B3%5Ctimes%20130.684%5DJ%2FK%3D-198.762J%2FK)
The correct answer is B. The shape of a molecule where three pairs of electrons are shared is a trigonal planar. This is characterized by one central atom and three atoms forming an equilateral triangle which is bonded to the central atom.
