Question

Which of the following chemical equations violates the law of conservation of mass?

\(Ti + 2Cl_2 \rightarrow TiCl_4\)
\(2C_2H_2 + 5O_2 \rightarrow 4CO_2 + 2H_2O\)
\(Li_2SO_4 + 2Ca(NO3)2 \rightarrow 2LiNO_3 + 2CaSO_4\)
\(MgSO_4 + 2NaOH \rightarrow Mg(OH)_2 + Na_2SO_4\)

Answer 1

@ganeshie8

Answer 2

Whichever one yields more or less substance than was in the products.

Answer 3

my bad not products, reactants

Answer 4

The second one?

Answer 5

whichever one isn't balanced

Answer 6

i think it is either b or d but im not sure

Answer 7

@Abhisar

Answer 8

I think the third reaction, because at the left side we have 1 atom of S, whereas at the right side we have 2 atoms of S

Answer 9

@sleepyjess Please, in order to check the conservation of mass in a chemical reaction, you have to verify that number of atoms of a certain substance at the left side of that reaction, is equal to the number of atoms of such substance at the right side of the same chemical reaction

Answer 10

I think it is the 2nd option because it has 5O\(_2\) only the right but it only has 4O on the left

Answer 11

SOrry in the second reaction you have, at left side, 10 atoms of O, and at the right side, you have 8+2=10 atoms of O.

Answer 12

thw symbol \[5O _{2}\], means that you have 5*2=10 atoms of Oxygen

Answer 13

Oh, I see where the other 8 are coming from now. So it would be the 3rd one.

Answer 14

that's right!

Answer 15

Thank you so much!

Answer 16

thank you!

Answer 17

Could you help me on one more?