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

C

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

C

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.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.