Which change is chemical?
water boiling
water undergoing electrolysis***
water freezing
water evaporating
Which number remains unchanged during photosynthesis?
the number of carbon atoms***
the number of water molecules
the number of glucose molecules
the number of carbon dioxide molecules
In a chemical reaction, which aspect of the reactants changes?
mass***
total mass
atoms
nuclei
A young snake eats and digests a mouse. The increase in the snake’s mass equals
the mass of the mouse plus the mass of waste produced by the snake.
the mass of the mouse plus the original mass of the snake.
the mass of the mouse.
the mass of the mouse minus the mass of waste produced by the snake.***
Cellular respiration transforms glucose and oxygen into carbon dioxide, water, and energy.
C6H12O6 + 6O2 → 6CO2 + ?H2O + Energy
Based on the law of conservation of matter, what is the missing coefficient for water?
4
6***
2
8
1. Water undergoing electrolysis
2. The number of carbon atoms
3. Arrangement of the atoms
4. The mass of the mouse minus the mass of waste produced by the snake.
5. (6)
The dude at the top lied about number 1 😒
All correct, 100% :)
All were right, thank you!
Yeah the other one is arrangement of the atoms. its question 3 for me
water undergoing electrolysis
the number of carbon atoms
mass
the mass of the mouse minus the mass of waste produced by the snake
6
In a chemical reaction the total mass remains unchanged the arrangement of atoms change
The REAL ANSWERS ‼️‼️‼️
Is correct