5.60*10²³ is the answer First you find the molar mass of nickel then you you turn grams to moles to atoms and boom there's your answer.
Answer:true
Explanation:
Invasive species are species that are not native that come in and steal the resources that the natives need
The compound that contains ionic bonds is CaO, Calcium oxide.
Answer:
Acidic conditions
Explanation:
From the equations, it is clear that addition of acid favours the precipitation of calcium oxalate. As acid is added, the equilibrium position continues to shift to the far right, favouring the complete dissociation of the oxalic acid. This decreases the pH of the solution by increasing oxonium ion concentration.
Similarly, as the oxalate ion concentration increases, the precipitation of the calcium oxalate is favoured at low pH. Hence the answer.
Answer:
4.39
Explanation:
Let's consider the following reaction at equilibrium.
2 NH₃(g) ⇄ 3 H₂(g) + N₂(g)
The concentration equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.
Kc = [H₂]³.[N₂]/[NH₃]²
Kc = (0.700)³.(0.800)/(0.250)²
Kc = 4.39