The reaction of fluorine with ammonia pro-
duces dinitrogen tetrafluoride and hydrogen
fluoride.
5f2(g) + 2nh3(g) - n, f2(g) + 6hf(g)
a. if you have 66.6 g nh3, how many grams of
f2 are required for a complete reaction?

b. how many grams of nh3 are required to
produce 4.65 g hf?

c. how many grams of n_fcan be produced
from 225 g f?
( tell me how to get the answers and i will give you brainliest)

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organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.