Which sequence of coefficients will balance the following equation ca (s) o2 (g) 2cao (s)

 Ca(s) + O₂(g)→ 2 CaO  (s)

The  sequence   of coefficient  that  will  balance the  above equation is

 2,1 ,2

Explanation

Coefficient  is the number in front  of  the formulas.

When balancing  the equation  the  number of atoms  in reactant side  must be  equal  to  number  of atoms  in product  side.

The sequence  that   balance the equation  above  is 2,1,2   therefore  the balanced  equation is as below.

2Ca (s)  +  O₂ → 2CaO (s)

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

it is easily magnetized.