Plzss : ) is 2h2 + o2 →2h2o a balanced chemical equation? is it obeying the law of conservation of matter? no, the equation is not balanced. the hydrogen (h) in the equation has less atoms represented on the products. no, the equation is not balanced. the oxygen (o) in the equation has less atoms represented on the products. yes, the equation is balanced. there are the same number of hydrogen (h) and oxygen (o) atoms on both sides of the equation.

The given reaction follows the law of conservation of mass and is balanced. Thus, the correct option is C.

The balanced chemical equation for the reaction has been:

The law of conservation of mass states that the mass of each element on the product and the reactant side has been equal. The mass has been proportional to the number of atoms, thus the atoms have been equal on both sides of the reaction.

In the given reaction:

Reactant = 4

Product = 4

Reactant = 2

Product = 2

Since there has been the same number of atoms of each element on both sides of the reaction, the reaction has been termed a balanced reaction. The law of conservation of mass has been followed in the equation.

Thus, option C is correct.

For more information about the law of conservation of mass, refer to the link:

link

It IS balanced.  There are 4 Hydrogen atoms on the left and the right and 2 Oxygen atoms on the left and the right.  

Step-by-step explanation:

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70