Answer:
Ksp of PbSO4 is 2.5 *10^-8
Explanation:
Given -
Solubility of PbSO4 = 0.048g/Liter
[Pb+2] * [SO42-] = mass/molecular weight of PbSO4
[Pb+2] * [SO42-] = 0.048g/Liter/303.3g/mol = 0.000158 M
Concentration of PbSO4 = moles/volume = 0.000158 M/1L = 0.000158 M
Ksp = [Pb+2] * [SO42-]
ksp = 0.000158 * 0.000158 = 2.5 *10^-8
The atom that has the largest atomic radius is Fr.
Answer is: D.The viewer travels through the electron cloud, then the nucleus, and then the electron cloud again.
Atom is composed of the nucleus and the electron cloud.
Protons (positive particles) and neutrons (neutral particles) are in the nucleus of an atom and electrons (negative particles) are in the electron cloud.
Nucleus is in the centar of the atom atom and electron cloud is surrounding it.
Answer
is: concentration
ammonia is higher than concentration of ammonium ion.<span>
Chemical reaction of ammonia in water: NH</span>₃ + H₂O →
NH₄⁺ + OH⁻.<span>
Kb(NH</span>₃) = 1,8·10⁻⁵.<span>
c</span>₀(NH₃) = 0,8 mol/L.<span>
c(NH</span>₄⁺) =
c(OH⁻) = x.<span>
c(NH</span>₃) =
0,8 mol/L - x.<span>
Kb = c(NH</span>₄⁺) · c(OH⁻) /
c(NH₃).<span>
0,000018 = x² / 0,8 mol/L - x. </span>
<span>x</span>² + 0,000018x - 0,0000144 = 0.
<span>
solve quadratic equation: x = c(NH</span>₄⁺) = 3,79·10⁻<span>³ mol/L.</span>