Answer:
A
Explanation:
The answer A is the best answer because it contains the most general characteristic of a chemical change.
There will be a shift towards the reactants
At STP one mole of any gas occupies 22.4 L
moles NO2 = 99.0/22.4 = 4.42
mass NO2 = 4.42 mol x 46.0 g/mol=203 g
B. a circle graph
circle graphs are the best to show percentages because they’re very easy to look at and get info from