When hydrogen gas burns and presence of oxygen, atoms are rearranged and new substances is formed, which of these statements best describe what happens?
A. The properties of new substances are difficult, so a physical change takes place.
B. The properties of new substances are the same so a physical change took place.
C. The properties of new substances are difference of a chemical change took place.
D. The properties of New substances are the same so
a chemical change took place
C. The properties of new substances are different so a chemical change took place.
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When hydrogen gas burns and presence of oxygen, atoms are rearranged and new substances is formed, which of these statements best describe what happens?
A. The properties of new substances are difficult, so a physical change takes place.
B. The properties of new substances are the same so a physical change took place.
C. The properties of new substances are difference of a chemical change took place.
D. The properties of New substances are the same so
a chemical change took place
I apologize for any confusion earlier. The correct answer is:
C. The properties of new substances are different, so a chemical change took place.
During the combustion of hydrogen gas in the presence of oxygen, the hydrogen and oxygen atoms rearrange to form water vapor as a new substance. This process involves a chemical change, as the properties of the resulting substance (water vapor) are different from those of the individual reactants (hydrogen and oxygen gases).
C. The properties of new substances are different, so a chemical change took place.
To determine which statement best describes what happens when hydrogen gas burns in the presence of oxygen, we need to understand the difference between physical and chemical changes.
A physical change refers to a change in the form or state of matter without any change in the chemical composition. For example, melting ice to form water is a physical change because the chemical composition of water remains the same.
On the other hand, a chemical change involves a rearrangement of atoms, resulting in the formation of new substances with different properties than the original substances. For example, when hydrogen gas burns (combines with oxygen), it forms water (H2O), which has different properties than hydrogen gas (H2) or oxygen gas (O2).
Considering this information, the most appropriate statement that describes what happens when hydrogen gas burns in the presence of oxygen is:
C. The properties of new substances are different, so a chemical change took place.
In this case, the formation of water from hydrogen and oxygen involves a chemical change because the chemical composition of the substances is altered, resulting in the formation of a new substance with different properties.