The formation of water from oxygen and hydrogen can be
described in the following word equation:

oxygen gas+ hydrogen gas - liquid water
In this reaction, liquid water is the

Select one:
•only compounds
•product
•waste
•reactant

The balanced chemical equation for the combustion of liquid methanol in oxygen gas to yield carbon dioxide gas and liquid water is:

2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(l)

If you multiply the coefficients (the numbers in front) times the subscripts for each element in each formula, you will find that there are 2 atoms of carbon, 8 atoms of hydrogen, and 8 atoms of oxygen on both sides of the equation, so it is balanced.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

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