Law of Conservation of Mass Is the mass

Law of Conservation of Mass Is the mass of the following equations conserved (balanced) or not? Explain.

The following chemical equation shows the decomposition of hydrogen peroxide into water and oxygen. When yeast is added to the peroxide, the decomposition speeds up by the yeast acting as a catalyst. D E C 2 H 2 O 2 N A L H = 4 A B O = 4 2 H 2 O + O 2 H =4 O =2+2 = 4

Acetic acid (vinegar) reacts with sodium bicarbonate (baking soda) and produces sodium acetate, water, and carbon dioxide. CH 3 COOH + Na. HCO 3 C= 3 H= 5 O= 5 Na = 1 D E C N A L A B CH 3 COONa + H 2 O + CO 2 C= 3 H= 5 O= 5 Na = 1

Is the mass conserved (balanced)? K = A B Br = N A L D E C 2 2 K = 2 Br = 2

Is the following chemical equation indicate a chemical reaction? L A C I M E H C N Ag + H a. O Fe + H S O I T T O A N EQU 2 2

Is the mass conserved (balanced)? Na = Cl = N LA D E C A B 1 T O N 2 Na = 2 Cl = 2

Is the following chemical equation indicate a chemical reaction? 4 Fe + 3 O 2 C A E H I M L A C N O I T A U 2 Fe O Q E 2 3

Mg + 10 O 2 Mg = O = 1 Mg. O A B 20 T O N N LA D E C Mg = 1 O =1

Does the following chemical equation follows the law of conservation of mass? L A C I M E Zn + C SH Ca. O N a O I T T Zn = 1 Ca =1 O A N S E= Q 1 U O = 1

Does the following chemical equation follows the law of conservation of mass? Mg + Cl 2 Mg = 1 N A L Cl = A B D E C 2 2 Mg. Cl Mg = 2 Cl = 2