Mole number of 75 g is 0.4 mol. NO2 is 0.8 mol and is 36.8 g.
Explanation:
All matter has mass and occupies space. Volume is a measure of how much space an object occupies. ... "Mass" only depends on how much matter is in an object. "Weight", on the other hand, depends on how strongly gravity pulls on an object.
Answer:
the are coefficients for the atom. the tell how many there are.
Explanation:
they tell you how many atoms there are of its type.
ex. 4 C²H³. there are 4 of the c² and h³ (couldn't find a way to use subscript so used the power signs to show.)
NACL, or salt, is an ionic compound made up of a cation from a base and an anion from an acid. (Water being the base.) Your answer would be the last option, "Formed due to reaction of acid with water."