Answer:
A. Rutherford's discovery that atoms contain a nucleus
Explanation:
Answer:
0.85M
Explanation:
Given parameters:
Mass of CuCl₂ = 400g
Volume of water = 3.5L
Unknown:
Molarity of the solution = ?
Solution:
Molarity is one of the ways of expressing the concentrations of a solution. It is defined as the number of moles per unit volume of a solvent.
Molarity = 
To find the number of moles of CuCl₂;
Number of moles = 
Molar mass of CuCl₂ = 63.6 + 2(35.5) = 134.6g/mol
Number of moles =
= 2.97moles
Molarity =
= 0.85M
Answer:
See explanation
Explanation:
The word equation is just a statement of the reaction in words as follows;
Magnesium oxide ----> Magnesium metal + oxygen gas
An unbalanced stoichiometric equation doesn't have equal number of atoms of each element on both sides.
Hence the unbalanced stoichiometric equation is as follows;
MgO(s) -----> Mg(s) + O2(g)