Mg, Ca, Sr, Ba, Ra and other elements in the same vertical line
The complete equation for this reaction is,
Ba(NO3)2 + Na2PO4 = 2NaNO3 + BaPO4
Among the compounds present in the reaction, Barium Nitrate, Sodium Phosphate and Sodium Nitrate are soluble ionic compounds. Hence, they will completely ionize into ions. Only BaSO4 is insoluble which becomes the precipitate. Ionic equation is:
Ba2+ + 2NO3- + 2Na+ + PO42- = 2Na+ +NO3- + BaPO4
Cancel like ions,
Ba2+ + PO42- = BaPO4.
Thus, the stoichiometric coefficient of Barium ion is 1.
The answer is (3) 3. The calculation rule of significant figures is when multiplication and division, the significant figures of result is equal to the least of the numbers involved. The significant figure of 2.70 and 80.01 is 3 and 4.
Answer:
Pascal is the most common unit for measuring pressure
The average sea level pressure is 1013 mbar
