Answer:
2+
Explanation:
Nickel has an atomic number of 28 meaning that it contains 28 protons in its nucleus. It would need 28 electrons in order to have no charge, because the positive and negative charges balance each other out. Since this atom of Ni has 26 electrons, it has lost 2 of its electrons, and therefore has a positive charge of 2.
Answer:
hope that helps
Explanation:
The total mass of reactants taken = 15.9 + 20.0 = 35.9 gm. From the conservation of mass the final mass of the contents of the vessel should also be 35.9 gm. But it is only 29.3 gm. The difference is due to the mass of released carbon dioxide gas.Hence the mass of carbon dioxide gas released = 35.9 – 29.3 = 6.6 gm
Answer:
Answer is in image see it..
M = n / V
Where, M is molarity (M or mol/L), n is number of moles of the solute (mol) and V is volume of the solution (L).
Here the solute is KNO₃.
The given molarity is 1.3 M
This means 1L of solution has 1.3 moles of KNO₃.
Hence moles in 600 mL = 1.3 M x 0.6 L = 0.78 mol
Therefore to make 1.3 M KNO₃ solution, needed moles of KNO₃ is 0.78 mol