Which of the following chemical equations follows the Law of Conservation of Mass? Hint: which is balanced? Options: CO 2 + H 2 O --> C 6 H 12 O 6 + O 2 , C 6 O + H 12 O --> C 6 H 12 O 2 , CO 2 + H 2 O --> C 6 H 12 O 6 + O 2 , CO 2 +H 2 O --> C 6 H 12 O 6 +O 2

C 6 O + H 12 O --> C 6 H 12 O 2

Balance this equation: Sb 2 S 3 + O 2 --> Sb + SO 2

Sb 2 S 3 + 3O 2 --> 2Sb + 3SO 2

In chemical reactions, what does the principle of conservation of mass mean?

Matter is not created or destroyed.

Which of the following chemical equations is an example of a double replacement reaction? 2Al 2 O 3 ⟶ 4Al + 3O 2 , 2C 5 H 10 + 15O 2 ⟶ 10CO 2 + 10H 2 O, 2MgCl 2 + Na 2 CO 3 ⟶ 2 NaCl + MgCO 3 , K 2 O + H 2 O ⟶ 2 KOH

2MgCl 2 + Na 2 CO 3 ⟶ 2 NaCl + MgCO 3

The product of a complete combustion reaction is always:

Carbon Dioxide Gas and water vapor

Which of the following chemical equations is an example of a combustion reaction? 2Al 2 O 3 ⟶ 4Al + 3O 2 , 2C 5 H 10 + 15O 2 ⟶ 10CO 2 + 10H 2 O, 2MgCl 2 + Na 2 CO 3 ⟶ 2 NaCl + MgCO 3 , K 2 O + H 2 O ⟶ 2 KOH

2C 5 H 10 + 15O 2 ⟶ 10CO 2 + 10H 2 O

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