SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -2H2 + O2 → 2H2O (You can disregard the numbers in the equations during this activity.) Some of the substances in an equation are elements and some are compounds. In the equation above, hydrogen and oxygen are elements and water is a compound.
Detailed explanation-2: -Synthesis reactions occur when two or more reactants combine in order to form a singular product. In this case, the 4 hydrogen atoms in the 2 hydrogen gas molecules (H2 ) combine with the 2 oxygen atoms in the 1 molecule of oxygen gas (O2 ). In doing this, only one product, water or H2O H 2 O, is formed.
Detailed explanation-3: -The balanced chemical equation is: 2 H 2 O 2 ( aq ) Hydrogen peroxide → 2 H 2 O Water ( l ) + O 2 ( g ) Oxygen.
Detailed explanation-4: -We add 2 moles to balance H 2 O, making a total of 4 on both sides. LHS and RHS have 4 hydrogen atoms and 2 oxygen atoms. The final balanced equation is given below. 2 H 2 ( g ) + O 2 ( g ) → 2 H 2 O ( l )