Answer:
more predators means less prey, it also probably affected other predators by introducing more territorial animals making it more crowded and harder to find a home for everyone
Answer:
selling sand I guess? Some places sell sand for high prices.
Explanation:
In a thermochemical equation, the enthalpy change is always written next to the balanced chemical equation.
For example, chemical reaction:
2Mg + O₂ → 2MgO. ΔH = -1204 kJ; this is exothermic reaction,
or chemical reaction: Fe₂O₃(s)
+ 3CO(g) → 2Fe(s) + 3CO₂<span>(g);ΔH = + 26.3 kJ, ths is endothermic reaction.</span>
<span>There are two types
of reaction: endothermic reaction (chemical reaction that absorbs more
energy than it releases) and exothermic reaction (chemical reaction that
releases more energy than it absorbs). </span>
Answer:
S = 0.2 E-7 M
Explanation:
- molar solubility (S) [=] mol/L
S S 2S + 0.4
∴ [F-] = 0.4 m = 0.4 mol/Kg
∴ solvent: H2O ⇒ δH2O = (997 Kg/m³)*(m³/1000L) = 0.997 Kg/L
⇒ [F-] = (0.4 mol/Kg)*(0.997 Kg/L) = 0.3988 M ≅ 0.4 M
∴ Ksp = 6.4 E-9 = [S]*[2S + 0.4]²
⇒ 6.4 E-9 = (S)*(4S² + 1.6S + 0.16)
⇒ 6.4 E-9 = 4S³ + 1.6S² + 0.16S
⇒ 4S³ + 1.6S² + 0.16S - 6.4 E-9 = 0
⇒ S = 0.2 E-7 M
