Responses
water evaporating: liquid water becoming gaseous water
water evaporating: liquid water becoming gaseous water
water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules
water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules
water boiling: solid water becoming gaseous water
water boiling: solid water becoming gaseous water
water freezing: liquid water becoming solid water
7 answers
The change that is chemical among the options provided is:
water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules.
This process involves breaking the chemical bonds in water (H₂O) to form separate elements, oxygen (O₂) and hydrogen (H₂), which is indicative of a chemical change. The other changes listed (evaporating, boiling, and freezing) are physical changes.
The number that remains unchanged during photosynthesis is:
the number of carbon atoms.
During photosynthesis, carbon dioxide (CO₂) is absorbed by plants, and through the process, carbon atoms from CO₂ are used to synthesize glucose (C₆H₁₂O₆). While the number of carbon dioxide molecules decreases as they are converted into glucose, the total number of carbon atoms remains consistent, as each carbon dioxide molecule contributes carbon atoms to the glucose produced.
In a chemical reaction, the aspect of the reactants that changes is:
arrangement of the atoms.
During a chemical reaction, the atoms in the reactants are rearranged to form products, but the total mass and the names of the elements remain unchanged. The nuclei of the atoms also do not change during the reaction.
The correct response is:
the mass of the mouse minus the mass of waste produced by the snake.
When the snake digests the mouse, itAssimilates some of the mass from the mouse for growth and energy, but a portion of that mass is also converted into waste. Therefore, the increase in the snake's mass is the mass of the mouse minus the mass of waste produced.
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