Ionic bounds are formed due to the electrostatic attraction between oppositely charged ions in a chemical compound.
The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion (anion).
<span>The answer should be Uranium. As tiny amounts of that (rods normally) can fuel a whole nuclear energy station for years.</span>
Mixing helps ensure that the measured pH is reflective of the entire solution
Answer:
a) 0.30
Explanation:
Kc = [C] [D] / ([A] [B])
Set up an ICE table:
![\left[\begin{array}{cccc}&Initial&Change&Equilibrium\\A&0.4&-x&0.4-x\\B&0.4&-x&0.4-x\\C&0&+x&x\\D&0&+x&x\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D%26Initial%26Change%26Equilibrium%5C%5CA%260.4%26-x%260.4-x%5C%5CB%260.4%26-x%260.4-x%5C%5CC%260%26%2Bx%26x%5C%5CD%260%26%2Bx%26x%5Cend%7Barray%7D%5Cright%5D)
Plug in values and solve:
9 = x² / (0.4 − x)²
3 = x / (0.4 − x)
1.2 − 3x = x
1.2 = 4x
x = 0.3
Answer:
68g/mol
Explanation:
The formula of ammonium sulfide is:
Ammonium sulfide = (NH₄)₂S
The molar mass of a compound is the mass in gram of one mole of the substance. In a compound, it is expressed gram formula mass or gram-molecular weight.
It is determined by the addition of the component atomic masses and then expressed in grams;
Atomic mass of N = 14, H = 1 and S = 32
(NH₄)₂S = 2[14 + 4(1)] + 32 = 36 + 32 = 68g/mol
