Question

Nazeeh conducted an experiment to demonstrate the law of conservation of matter. He burned a strip of magnesium that had a beginning mass of 5.0 g over an open flame. The magnesium gave off a bright white light and smoke as it was being burned. The white ash that was left over had a mass of 4.5 g. Nazeeh concluded that his experiment did not uphold the law of conservation of matter.

What did Nazeeh NOT take into consideration when drawing his conclusion?
A
that some of the mass was lost to the air as light

B
that mass has absolutely no relationship to matter

C
that some of the mass was lost to the air as smoke

D
that ash has a lower mass than the strip of magnesium

Answer 1

C

Step-by-step explanation:

A: Light isn´t part of the mass of magnesium, light is energy, it doesn´t occupate space.

B: Mass clearly have a relationship with matter, if you increase the amout of mass, you will increase the amout of matter, one way or another.

C: It is correct, some of the mass was lost because hot gases tend to go up.

D: Yes, the ash has a lower mass than magnesium, but it is not because ash is lighter or something like that. It is because some of the ash was lost due to the air.

Answer 2

C

that some of the mass was lost to the air as smoke