Which chemical equation follows the law of conservation of mass? A. 2NaOH + H2S04 - Na2SO4 + H20
B. NaOH+H2SO4 - Na2SO4 + 2H20
C. 2NaOH + H2S04 - Na2SO4 + 2H20
D. NaOH + H2SO4 - Na2SO4+H20

C. 2NaOH + H₂SO₄ -> Na₂SO₄ + 2H₂O

Explanation:

Simply count up the elements in the reactants and the products, then compare.

Reactants:

2 Na = 2 Na

2 O + 4 O = 6 O

2 H + 2 H = 4 H

Products:

2 Na = 2 Na

4 O + 2 O = 6 O

2 x H₂ = 4 H

Because the constituent elements in the reactants = products, the law of conservation of mass is preserved. You can check the other 3 options to see that they will not equal each other.

Don't forget to distribute the coefficients to every part of the formula; on the other hand, subscripts only apply to the element they are under. If a coefficient needs to be multiplied to an element with a subscript, use the subscript instead of 1 (1 is when there are no subscripts).

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.