Question

What happens to the mass of substances during a physical change?
What happens to the mass of substances during a chemical change?
How do you know when a chemical reaction has taken place?
How can you demonstrate the law of conservation of mass?

Answer 1

@neveralone

Answer 2

what question do you need help with? i see 4.

Answer 3

@jaxs

Answer 4

1. The mass of molecules will change, but the number of particles will stay the same. Basically meaning the molecules will spread out or compact depending on the change I believe.

Answer 5

What are the options
and there all question?

Answer 6

oh ok ok i got u

Answer 7

Well the last one is Ez The law of conservation of mass "states" that matter cannot be created or destroyed in a chemical reaction.

Answer 8

3. in order to tell if a chemical change has taken place is to use your senesce basically examples Color Change, The smell, and the temperature change.

Answer 9

@dukedadon

Answer 10

wsp?

Answer 11

ohh ok i gotchu

Answer 12

During a physical change, the arrangement of particles may change but the mass, number of atoms and number of molecules will stay the same.

Answer 13

Source : https://intl.siyavula.com/read/science/grade-10/physical-and-chemical-change/13-physical-and-chemical-change-04#:~:text=During%20a%20physical%20change%2C%20the,molecules%20will%20stay%20the%20same.&text=During%20a%20chemical%20change%2C%20the,involve%20large%20changes%20in%20energy.

Answer 14

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.

Answer 15

Source : https://intl.siyavula.com/read/science/grade-10/physical-and-chemical-change/13-physical-and-chemical-change-02#:~:text=In%20a%20chemical%20reaction%20the,destroyed%20in%20a%20chemical%20reaction.

Answer 16

There are five signs of a chemical change:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
Precipitate (formation of a solid).

Answer 17

and the last one would be : The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change.

Answer 18

Bro you got all that off google thats plagiarism

Answer 19

im chill im just sayin

Answer 20

Oh ok that good

Answer 21

the mass wont change, depending on the change however. chemical change and yes the weight will change