2C₃H₇OH + 9O₂ = 6CO₂ + 8H₂O
V(O₂)=12.0 dm³
n(C₃H₇OH)=0.1 mol
n(O₂)=12.0 dm³/22.4 dm³/mol=0.5357 mol
C₃H₇OH : O₂ 2:9 1:4.5
0.1:0.5357
oxygen in excess
V(CO₂)=3Vm*n(C₃H₇OH)
V(CO₂)=3*22.4*0.1=6.72 dm³
Most likely the phone because the poster would glide the shoe box isn't that heavy and the penny is light so i would think its the phone because its medium size and is heavier
Answer: A chemical change results from a chemical reaction while a physical change is when matter changes forms. In other words, a chemical change produces a new substance, and a physical change does not. For example, a chemical change includes burning, cooking, rusting and rotting, among many others. An example of a physical change includes boiling, melting, freezing, and shredding. Usually, physical changes can be undone while chemical changes cannot. The only way to reverse a chemical change is by creating another chemical reaction.
Any chemical reaction would always result to a chemical change. If you can see observations of a change in color, bubbling or any liberation of gas, formation of a precipitate, or a change in temperature, then a chemical change has occurred. I can't say which combinations would result to a chemical change because there are no choices. I can only give an example. If HCl reacts with NaOH,
HCl + NaOH → NaCl + H₂O
This is a chemical change because a precipitate in the form of NaCl salt is formed.
Answer:
B) ethanol
Explanation:
I got a 100% on my test plus its the answer on usatestprep